Boeing KC-135 Stratotanker

US military aerial refueling and transport aircraft

KC-135 Stratotanker

File:F-15C Eagle from the 67th Fighter Squadron at Kadena AB is refueled by a KC-135R Stratotanker from the 909th Air Refueling Squadron .jpg
A KC-135R refuels an F-15C Eagle
Role  | Aerial refueling and transport aircraft

Type of aircraft

National origin | United States
Manufacturer  | Boeing
First flight  | 31 August 1956
Introduction  | June 1957
Status  | In service
Primary users  | United States Air Force
French Air Force
Turkish Air Force
Republic of Singapore Air Force
Produced  | 1955–1965
Number built | 803
Developed from | Boeing 367-80
Variants  | Boeing C-135 Stratolifter
Boeing EC-135
Boeing NC-135
Boeing OC-135B Open Skies
Boeing RC-135
Boeing WC-135 Constant Phoenix

The Boeing KC-135 Stratotanker is an American military aerial refueling aircraft that was developed from the Boeing 367-80 prototype, alongside the Boeing 707 airliner. It is the predominant variant of the C-135 Stratolifter family of transport aircraft. The KC-135 was the United States Air Force's first jet-powered refueling tanker and replaced the KC-97 Stratofreighter. The KC-135 was initially tasked with refueling strategic bombers, but it was used extensively in the Vietnam War and later conflicts such as Operation Desert Storm to extend the range and endurance of US tactical fighters and bombers.

The KC-135 entered service with the United States Air Force (USAF) in 1957; it is one of nine military fixed-wing aircraft with over 60 years of continuous service[1] with its original operator. The KC-135 is supplemented by the larger McDonnell Douglas KC-10 Extender. Studies have concluded that many of the aircraft could be flown until 2030, although maintenance costs have greatly increased. The KC-135 is to be partially replaced by the Boeing KC-46 Pegasus.

## Contents

* 1 Development
* 1.1 Background
* 1.2 Engine retrofits
* 1.3 Avionics upgrades
* 1.4 Further upgrades and derivatives
* 2 Design
* 3 Operational history
* 3.1 Introduction into service
* 3.2 Research usage
* 3.3 Replacements
* 4 Variants
* 5 Operators
* 5.1 Former operators
* 6 Accidents
* 7 Aircraft on display
* 8 Specifications (KC-135R)
* 9 See also
* 10 References
* 11 Bibliography
* 12 External links

## Development[edit | edit source]

### Background[edit | edit source]

Starting in 1950 the Air Force operated the world's first production aerial tanker, the Boeing KC-97 Stratofreighter, a gasoline fueled piston-engined Boeing Stratocruiser (USAF designation C-97 Stratofreighter) with a Boeing-developed flying boom and extra kerosene (jet fuel) tanks feeding the boom. The Stratocruiser airliner itself was developed from the B-29 bomber after World War II. In the KC-97, the mixed gasoline/kerosene fuel system was clearly not desirable and it was obvious that a jet-powered tanker aircraft would be the next development, having a single type of fuel for both its own engines and for passing to receiver aircraft. The 230 mph (370 km/h) cruise speed of the slower, piston-engined KC-97 was also a serious issue, as using it as an aerial tanker forced the newer jet-powered military aircraft to slow down to mate with the tanker's boom.

Like its sibling, the commercial Boeing 707 jet airliner, the KC-135 was derived from the Boeing 367-80 jet transport "proof of concept" demonstrator, which was commonly called the "Dash-80". The KC-135 is similar in appearance to the 707, but has a narrower fuselage and is shorter than the 707. The KC-135 predates the 707, and is structurally quite different from the civilian airliner. Boeing gave the future KC-135 tanker the initial designation Model 717.[2]

File:Boeing B-52D-70-BO (SN 56-0582) is refueled by Boeing KC-135A-BN (SN 55-3127) 061127-F-1234S-009.jpg

A KC-135A refueling a B-52D during the Cold War. Both aircraft types were operated by the Strategic Air Command.

In 1954 USAF's Strategic Air Command (SAC) held a competition for a jet-powered aerial refueling tanker. Lockheed's tanker version of the proposed Lockheed L-193 airliner with rear fuselage-mounted engines was declared the winner in 1955.[3] Since Boeing's proposal was already flying, the KC-135 could be delivered two years earlier and Air Force Secretary Harold E. Talbott ordered 250 KC-135 tankers until Lockheed's design could be manufactured. In the end, orders for the Lockheed tanker were dropped rather than supporting two tanker designs. Lockheed never produced its jet airliner, while Boeing would eventually dominate the market with a family of airliners based on the 707.[4][5]

In 1954, the Air Force placed an initial order for 29 KC-135As, the first of an eventual 820 of all variants of the basic C-135 family. The first aircraft flew in August 1956 and the initial production Stratotanker was delivered to Castle Air Force Base, California, in June 1957. The last KC-135 was delivered to the Air Force in 1965.

File:General Curtis LeMay arrived in Buenos Aires Argentine on November 11, 1957.jpg

On 11 November 1957, Air Force Vice Chief of Staff General Curtis LeMay tested the first KC-135 on a long-haul flight from Westover Air Force Base, Massachusetts to Buenos Aires, Argentina.

Developed in the early 1950s, the basic airframe is characterized by 35-degree aft swept wings and tail, four underwing-mounted engine pods, a horizontal stabilizer mounted on the fuselage near the bottom of the vertical stabilizer with positive dihedral on the two horizontal planes and a hi-frequency radio antenna which protrudes forward from the top of the vertical fin or stabilizer. These basic features make it strongly resemble the commercial Boeing 707 and 720 aircraft, although it is actually a different aircraft.

Reconnaissance and command post variants of the aircraft, including the RC-135 Rivet Joint and EC-135 Looking Glass aircraft were operated by SAC from 1963 through 1992, when they were reassigned to the Air Combat Command (ACC). The USAF EC-135 Looking Glass was subsequently replaced in its role by the U.S. Navy E-6 Mercury aircraft, a new build airframe based on the Boeing 707-320B.

### Engine retrofits[edit | edit source]

All KC-135s were originally equipped with Pratt & Whitney J57-P-59W turbojet engines, which produced 10,000 lbf (44 kN) of thrust dry, and approximately 13,000 lbf (58 kN) of thrust wet. Wet thrust is achieved through the use of water injection on takeoff, as opposed to "wet thrust" when used to describe an afterburning engine. 670 US gallons (2,500 L) of water are injected into the engines over the course of three minutes. The water is injected into the inlet and the diffuser case in front of the combustion case. The water cools the air in the engine to increase its density; it also reduces the turbine gas temperature, which is a primary limitation on many jet engines. This allows the use of more fuel for proper combustion and creates more thrust for short periods of time, similar in concept to "War Emergency Power" in a piston-engined aircraft.

File:KC-135R-Taxi.JPG

A nose-on view of several re-engined KC-135R aircraft taxiing prior to takeoff. The new engines are CFM56-2 high-bypass turbofans.

In the 1980s, the first modification program retrofitted 157 Air Force Reserve (AFRES) and Air National Guard (ANG) tankers with the Pratt & Whitney TF33-PW-102 turbofan engines from 707 airliners retired in the late 1970s and early 1980s. The modified tanker, designated the KC-135E, was 14% more fuel-efficient than the KC-135A and could offload 20% more fuel on long-duration flights. Only the KC-135E aircraft were equipped with thrust reversers for aborted takeoffs and shorter landing roll-outs. The KC-135E fleet has since either been retrofitted as the R-model configuration or placed into long-term storage ("XJ"), as Congress has prevented the Air Force from formally retiring them. The final KC-135E, tail number 56-3630, was delivered by the 101st Air Refueling Wing to the 309th Aerospace Maintenance and Regeneration Group (AMARG) at Davis–Monthan Air Force Base in September 2009.[6]

File:KC-135-Stratotanker-Cockpit.jpg

Flight deck of KC-135R; instrument panel has been modified under the Pacer-CRAG program

The second modification program retrofitted 500 aircraft with new CFM International CFM56 (military designation: F108) high-bypass turbofan engines produced by General Electric and Safran. The CFM56 engine produces approximately 22,500 lbf (100 kN) of thrust, nearly a 100% increase compared to the original J57 engine. The modified tanker, designated KC-135R (modified KC-135A or E) or KC-135T (modified KC-135Q), can offload up to 50% more fuel (on a long-duration sortie), is 25% more fuel-efficient, and costs 25% less to operate than with the previous engines. It is also significantly quieter than the KC-135A, with noise levels at takeoff reduced from 126 to 99 decibels.[7][8]

The KC-135R's operational range is 60% greater than the KC-135E for comparable fuel offloads, providing a wider range of basing options.[9]

Upgrading the remaining KC-135Es into KC-135Rs is no longer in consideration; this would have cost approximately US$3 billion, $24 million per aircraft.[9] According to Air Force data, the KC-135 fleet had a total operation and support cost in fiscal year 2001 of about $2.2 billion. The older E model aircraft averaged total costs of about $4.6 million per aircraft, while the R models averaged about $3.7 million per aircraft. Those costs include personnel, fuel, maintenance, modifications, and spare parts.[10]

### Avionics upgrades[edit | edit source]

File:KC-135 Block 45 glass cockpit 2017.jpg

Block 45 glass cockpit

In order to expand the KC-135's capabilities and improve its reliability, the aircraft has undergone a number of avionics upgrades. Among these was the Pacer-CRAG program (compass, radar and GPS) which ran from 1999 to 2002 and modified all the aircraft in the inventory to eliminate the Navigator position from the flight crew. The fuel management system was also replaced. The program development was done by Rockwell Collins in Iowa[11] and installation was performed by BAE Systems at the Mojave Airport in California.[12] Block 40.6 allows the KC-135 to comply with global air-traffic management. The latest block upgrade to the KC-135, the Block 45 program, is online with the first 45 upgraded aircraft delivered by January 2017. Block 45 adds a new glass cockpit digital display, radio altimeter, digital autopilot, digital flight director and computer updates. The original, no longer procurable, analog instruments, including all engine gauges, were replaced.[13] Rockwell Collins again supplied the major avionic modules and the modification work is being done at Tinker AFB.[14]

### Further upgrades and derivatives[edit | edit source]

The KC-135Q variant was modified to carry JP-7 fuel necessary for the Lockheed SR-71 Blackbird by separating the JP-7 from the KC-135's own fuel supply (the body tanks carrying JP-7, and the wing tanks carrying JP-4 or JP-8). The tanker also had special fuel systems for moving the different fuels between different tanks.[15] When the KC-135Q model received the CFM56 engines, it was redesignated the KC-135T model, which was capable of separating the main body tanks from the wing tanks where the KC-135 draws its engine fuel. The only external difference between a KC-135R and a KC-135T is the presence of a clear window on the underside of the empennage of the KC-135T where a remote controlled searchlight is mounted. It also has two ground refueling ports, located in each rear wheel well so ground crews can fuel both the body tanks and wing tanks separately.

File:FRL-Mk.32B-Pod-S.jpg

Cutaway of the Flight Refueling Limited Mk.32B Refueling Pod

Eight KC-135R aircraft are receiver-capable tankers, commonly referred to as KC-135R(RT). All eight aircraft were with the 22d Air Refueling Wing at McConnell AFB, Kansas, in 1994.[16] They are primarily used for force extension and Special Operations missions, and are crewed by highly qualified receiver capable crews. If not used for the receiver mission, these aircraft can be flown just like any other KC-135R.

The Multi-point Refueling Systems (MPRS) modification adds refueling pods to the KC-135's wings. The pods allow refueling of U.S. Navy, U.S. Marine Corps and most NATO tactical jet aircraft while keeping the tail-mounted refueling boom. The pods themselves are Flight Refueling Limited MK.32B model pods, and refuel via the probe and drogue method common to Navy/Marine Corps tactical jets, rather than the primary "flying boom" method used by Air Force fixed-wing aircraft. This allows the tanker to refuel two receivers at the same time, which increases throughput compared to the boom drogue adapter.[17]

A number of KC-135A and KC-135B aircraft have been modified to EC-135, RC-135 and OC-135 configurations for use in several different roles (although these could also be considered variants of the C-135 Stratolifter family).

## Design[edit | edit source]

File:KC-135Boom-operator-521.jpg

USAF KC-135R boom operator view from boom pod

The KC-135R has four turbofan engines, mounted under 35-degree swept wings,[18] which power it to takeoffs at gross weights up to 322,500 pounds (146,300 kg). Nearly all internal fuel can be pumped through the tanker's flying boom, the KC-135's primary fuel transfer method. A boom operator stationed in the rear of the aircraft controls the boom while lying prone, viewing through a window at the bottom of the tail. Both the flying boom and operators station are similar to those of the previous KC-97. A special shuttlecock-shaped drogue, attached to and trailing behind the flying boom, may be used to refuel aircraft fitted with probes. This apparatus is significantly more unforgiving of pilot error in the receiving aircraft than conventional trailing hose arrangements; an aircraft so fitted is also incapable of refueling by the normal flying boom method until the attachment is removed. A cargo deck above the refueling system can hold a mixed load of passengers and cargo. Depending on fuel storage configuration, the KC-135 can carry up to 83,000 pounds (38,000 kg) of cargo.

## Operational history[edit | edit source]

### Introduction into service[edit | edit source]

File:KC-135 refueling.jpg

An F-15 backs out after refueling from a KC-135R.

The KC-135 was initially purchased to support bombers of the Strategic Air Command, but by the late 1960s, in the Southeast Asia theater, the KC-135 Stratotanker's ability as a force multiplier came to the fore. Midair refueling of F-105 and F-4 fighter-bombers as well as B-52 bombers brought far-flung bombing targets within reach, and allowed fighter missions to spend hours at the front, rather than a few minutes, which was usual due to their limited fuel reserves and high fuel consumption. KC-135 crews refueled both Air Force and Navy / Marine Corps aircraft; though they would have to change to probe and drogue adapters depending upon the mission, the Navy and Marine Corps not having fitted their aircraft with flying boom receptacles since the USAF boom system was impractical for aircraft carrier operations. Crews also helped to bring in damaged aircraft which could sometimes fly while being fed by fuel to a landing site or to ditch over the water (specifically those with punctured fuel tanks). KC-135s continued their tactical support role in later conflicts such as Operation Desert Storm and current aerial strategy.

SAC had the KC-135 Stratotanker in service with Regular Air Force SAC units from 1957 through 1992 and with SAC-gained ANG and AFRES units from 1975 through 1992.[19] Following a major USAF reorganization that resulted in the inactivation of SAC in 1992, most KC-135s were reassigned to the newly created AMC.[19] While AMC gained the preponderance of the aerial refueling mission, a small number of KC-135s were also assigned directly to United States Air Forces in Europe (USAFE), Pacific Air Forces (PACAF) and the Air Education and Training Command (AETC). All AFRC KC-135s and most of the ANG KC-135 fleet became operationally-gained by AMC, while Alaska Air National Guard and Hawaii Air National Guard KC-135s became operationally-gained by PACAF.[citation needed]

AMC manages 396 Stratotankers, of which the AFRC and ANG fly 243 in support of AMC's mission as of May 2018.[20] The KC-135 is one of a few military aircraft types with over 50 years of continuous service with its original operator as of 2009.[21][22]

Israel was offered KC-135s again in 2013, after turning down the aging aircraft twice due to expense of keeping them flying.[23][24] The IAF again rejected the offered KC-135Es, but said that it would consider up to a dozen of the newer KC-135Rs.[25]

### Research usage[edit | edit source]

File:KC-135A with Winglets in flight.jpg

KC-135 winglet flight tests at Armstrong Flight Research Center.

Besides its primary role as an inflight aircraft refueler, the KC-135, designated NKC-135, has assisted in several research projects at the NASA Armstrong Flight Research Center at Edwards Air Force Base, California. One such project occurred between 1979 and 1980 when special wingtip "winglets", developed by Richard Whitcomb of the Langley Research Center, were tested at Armstrong, using an NKC-135A tanker loaned to NASA by the Air Force. Winglets are small, nearly vertical fins installed on an aircraft's wing tips. The results of the research showed that drag was reduced and range could be increased by as much as 7 percent at cruise speeds.[26][27] Winglets are now being incorporated into most new commercial and military transport/passenger jets, as well as business aviation jets.

NASA also has operated several KC-135 aircraft (without the tanker equipment installed) as their famed Vomit Comet zero-gravity simulator aircraft. The longest-serving (1973 to 1995) version was KC-135A, AF Ser. No. 59-1481, named Weightless Wonder IV and registered as N930NA.[28]

### Replacements[edit | edit source]

Main article: KC-X

File:KC135s Afghanistan.jpg

KC-135Rs at twilight on the flight line

Between 1993 and 2003, the amount of KC-135 depot maintenance work doubled, and the overhaul cost per aircraft tripled.[29] In 1996, it cost $8,400 per flight hour for the KC-135, and in 2002 this had grown to $11,000. The Air Force's 15-year estimates project further significant cost growth through fiscal year 2017. KC-135 fleet operations and support costs were estimated to grow from about $2.2 billion in fiscal year 2003 to $5.1 billion (2003 dollars) in fiscal year 2017, an increase of over 130 percent, which represented an annual operating cost growth rate of about 6.2 percent.[30]

The Air Force projected that E and R models have lifetime flying hour limits of 36,000 and 39,000 hours, respectively. According to the Air Force, only a few KC-135s would reach these limits by 2040, when some aircraft would be about 80 years old. A later 2005 Air Force study estimated that KC-135Es upgraded to the R standard could remain in use until 2030.[9][better source needed]

In 2006, the KC-135E fleet was flying an annual average of 350 hours per aircraft and the KC-135R fleet was flying an annual average of 710 hours per aircraft. The KC-135 fleet is currently flying double its planned yearly flying hour program to meet airborne refueling requirements, and has resulted in higher than forecast usage and sustainment costs.[31] In March 2009, the Air Force indicated that KC-135s would require additional skin replacement to allow their continued use beyond 2018.[32]

File:Kc135-f35-marchafb.jpg

View from the boom operator's hatch as a F-35 takes on fuel from a KC-135 of the 912d ARS

The USAF decided to replace the KC-135 fleet. However, the fleet is large and will need to be replaced gradually. Initially the first batch of replacement planes was to be an air tanker version of the Boeing 767, leased from Boeing. In 2003, this was changed to contract where the Air Force would purchase 80 KC-767 aircraft and lease 20 more.[33] In December 2003, the Pentagon froze the contract and in January 2006, the KC-767 contract was canceled. This move followed public revelations of corruption in how the contract was awarded, as well as controversy regarding the original leasing rather than outright purchase agreement. The then Secretary of Defense Rumsfeld stated that that move would in no way impair the Air Force's ability to deliver the mission of the KC-767, which would be accomplished by implementing continuing upgrades to the KC-135 and KC-10 Extender fleet.

In January 2007, the U.S. Air Force formally launched the KC-X program, with a request for proposal (RFP). KC-X was the first phase of three acquisition programs meant to replace the KC-135 fleet.[34] On 29 February 2008, the US Defense Department announced that it had selected the EADS/Northrop Grumman "KC-30" (to be designated the KC-45A) over the Boeing KC-767.[35][36][37] Boeing protested the award on 11 March 2008, citing irregularities in the competition and bid evaluation.[38] On 18 June 2008, the US Government Accountability Office sustained Boeing's protest of the selection of the Northrop Grumman/EADS's tanker.[39] In February 2010, the US Air Force restarted the KC-X competition with the release of a revised request for proposal (RFP).[40][41] After evaluating bids, the USAF selected Boeing's 767-based tanker design, with the military designation KC-46, as a replacement in February 2011.[42] The first KC-46A Pegasus was delivered to the U.S. Air Force on 10 January 2019.[43]

Two foreign users of the KC-135, the French Air Force and the Republic of Singapore Air Force took deliveries of Airbus A330 MRTTs as replacements for their Stratotankers.[44][45]

## Variants[edit | edit source]

See Boeing C-135 Stratolifter for further details on the C-135 family.

File:KC135family.jpg

Active KC-135 aircraft liveries

KC-135A

Original production version powered by four Pratt & Whitney J57s, 732 built. Given the Boeing model numbers 717-100A, 717-146 and 717-148.[46]

NKC-135A

Test-configured KC-135A.

KC-135B

Airborne command post version equipped with turbofan engines, 17 built. Provided with in-flight refueling capability and redesignated EC-135C.[47] Given the model number 717-166.[46]

KC-135D

All four RC-135As (Pacer Swan) were modified to partial KC-135A configuration in 1979.[48][49] The four aircraft (serial numbers 63-8058, 63-8059, 63-8060 and 63-8061) were given a unique designation KC-135D as they differed from the KC-135A in that they were built with a flight engineer's position on the flight deck.[50] The flight engineer's position was removed when the aircraft were modified to KC-135 standards but they retained their electrically powered wing flap secondary (emergency) drive mechanism and second air conditioning pack which had been used to cool the RC-135As on-board photo-mapping systems.[51] Later re-engined with Pratt & Whitney TF33 engines and a cockpit update to KC-135E standards in 1990 and were retired to the 309th AMARG at Davis-Monthan AFB, AZ in 2007.[49][52]

KC-135E

Air National Guard and Air Force Reserve KC-135As re-engined with Pratt & Whitney TF33-PW-102 engines from retired 707 airliners (161 modified). All E model aircraft were retired to the 309th AMARG at Davis-Monthan AFB by September 2009 and replaced with R models.[6][53]

NKC-135E

Test-configured KC-135E. 55-3132 NKC-135E "Big Crow I" & 63-8050 NKC-135B "Big Crow II" used as airborne targets for the Boeing YAL-1 Airborne Laser carrier.

KC-135Q

KC-135As modified to carry JP-7 fuel necessary for the SR-71 Blackbird, 56 modified,[47] survivors to KC-135T.

KC-135R (1960s)

4 JC/KC-135As converted to Rivet Stand (Later Rivet Quick) configuration for reconnaissance and evaluation of above ground nuclear test (55-3121, 59–1465, 59–1514, 58–0126; 58-0126 replaced 59-1465 after it crashed in 1967). These aircraft were powered by Pratt & Whitney J57 engines and were based at Offutt AFB, Nebraska.

KC-135R

KC-135As and some KC-135Es re-engined with CFM56 engines, more than 417 converted[20]

KC-135R(RT)

Receiver-capable KC-135R Stratotanker; eight modified with either a Boeing or LTV receiver system and a secure voice SATCOM radio. Three of the aircraft (60-0356, -0357, and -0362) were converted to tankers from RC-135Ds, from which they retained their added equipment.

File:KC-135R Stratotanker (62-3567) of the Turkish Air Force arrives 2016 RIAT 7Jul2016 arp.jpg

Boeing KC-135R Stratotanker (code 62–3567) of the Turkish Air Force arrives at the 2016 Royal International Air Tattoo, England

KC-135T

KC-135Q re-engined with CFM56 engines, 54 modified.

C-135F

A new-built variant for France as dual-role tanker/cargo and troop carrier aircraft.[48] 12 were built for the French Air Force with the addition of a drogue adapter on the refueling boom. Given Boeing model numbers 717-164 and 717-165.[54]

C-135FR

11 surviving C-135Fs upgraded with CFM International F108 turbofans between 1985 and 1988. Later modified with MPRS wing pods.[54]

EC-135Y

An airborne command post modified in 1984 to support CINCCENT. Aircraft 55-3125 was the only EC-135Y. Unlike its sister EC-135N, it was a true tanker that could also receive in-flight refueling. Pratt & Whitney TF33-PW-102. Retired to 309th AMARG at Davis-Monthan AFB, AZ.

## Operators[edit | edit source]

File:Flag of Chile.svg Chile

* Chilean Air Force operates 3 KC-135Es. It received its first KC-135E in February 2010.[55]

France

* French Air and Space Force operates 11 C-135FRs and 3 KC-135Rs, which are being replaced by 15 Airbus A330 MRTTs, French military designation Phénix, from 2018 to 2023.

File:62-3563 Boeing KC-135R Stratotanker Turkey - Air Force (43417006652).jpg

Turkish KC-135R Stratotanker nicknamed Asena.

Turkey

* Turkish Air Force operates 7 KC-135Rs.

File:KC-135 Stratotanker Elephant Walk.jpg

Six KC-135 Stratotankers demonstrate the elephant walk formation.

File:Kc135-3533-marchafb-lg.jpg

Cargo door of a USAF KC-135 of the 452d AMW at March Air Reserve Base

File:Pease Air National Guard Base 03Sept2013.jpg

64 ARS and 157 ARW personnel working on a KC-135R at Pease ANGB in September 2013

File:Flag of the United States.svg United States

* United States Air Force operates 398 KC-135s (156 Active duty, 70 Air Force Reserve, and 172 Air National Guard) as of May 2017[update].[56]
* 57th Wing – Nellis Air Force Base, Nevada
* 509th Weapons Squadron – Fairchild Air Force Base, Washington
* 97th Air Mobility Wing – Altus Air Force Base, Oklahoma
* 54th Air Refueling Squadron
* 412th Test Wing – Edwards AFB, California
* 412th Flight Test Squadron
* 418th Flight Test Squadron
* 6th Air Refueling Wing – MacDill AFB, Florida
* 50th Air Refueling Squadron
* 91st Air Refueling Squadron
* 99th Air Refueling Squadron – Birmingham Air National Guard Base, Alabama (Associate with 117th ARW)
* 22d Air Refueling Wing – McConnell AFB, Kansas
* 349th Air Refueling Squadron
* 350th Air Refueling Squadron
* 92d Air Refueling Wing – Fairchild AFB, Washington
* 92d Air Refueling Squadron
* 93d Air Refueling Squadron
* 97th Air Refueling Squadron
* 384th Air Refueling Squadron
* 912th Air Refueling Squadron – March ARB, California (Associate with 452d ARW)
* 375th Air Mobility Wing – Scott AFB, Illinois
* 906th Air Refueling Squadron (associate with 126th ARW)
* 18th Wing – Kadena AB, Japan
* 909th Air Refueling Squadron
* 100th Air Refueling Wing – RAF Mildenhall, England, UK
* 351st Air Refueling Squadron
* Air Force Reserve
* 434th Air Refueling Wing – Grissom ARB, Indiana
* 72d Air Refueling Squadron
* 74th Air Refueling Squadron
* 452d Air Mobility Wing – March ARB, California
* 336th Air Refueling Squadron
* 459th Air Refueling Wing – Andrews AFB, Maryland
* 756th Air Refueling Squadron
* 507th Air Refueling Wing – Tinker AFB, Oklahoma
* 465th Air Refueling Squadron
* 730th Air Mobility Training Squadron (Altus AFB, Oklahoma)
* 914th Air Refueling Wing \- Niagara Falls International Airport, New York
* 328th Air Refueling Squadron
* 927th Air Refueling Wing – MacDill AFB, Florida (Associate with 6th AMW)
* 63d Air Refueling Squadron
* 931st Air Refueling Group – McConnell AFB, Kansas (Associate with 22d ARW)
* 18th Air Refueling Squadron
* 940th Air Refueling Wing – Beale AFB, California
* 314th Air Refueling Squadron
* Air National Guard
* 101st Air Refueling Wing – Bangor, Maine
* 132d Air Refueilng Squadron
* 108th Wing – McGuire AFB, New Jersey
* 141st Air Refueling Squadron
* 117th Air Refueling Wing – Birmingham, Alabama
* 106th Air Refueling Squadron
* 121st Air Refueling Wing – Rickenbacker ANGB, Ohio
* 166th Air Refueling Squadron
* 126th Air Refueling Wing – Scott AFB, Illinois
* 108th Air Refueling Squadron
* 127th Wing – Selfridge ANGB, Michigan
* 171st Air Refueling Squadron
* 128th Air Refueling Wing – Milwaukee, Wisconsin
* 126th Air Refueling Squadron
* 134th Air Refueling Wing – Knoxville, Tennessee
* 151st Air Refueling Squadron
* 141st Air Refueling Wing – Fairchild AFB, Washington (Associate with 92d ARW)
* 116th Air Refueling Squadron
* 151st Air Refueling Wing – Salt Lake City, Utah
* 191st Air Refueling Squadron
* 154th Wing – Hickam AFB, Hawaii
* 203d Air Refueling Squadron
* 155th Air Refueling Wing – Lincoln, Nebraska
* 173rd Air Refueling Squadron
* 161st Air Refueling Wing – Phoenix Sky Harbor International Airport / Goldwater Air National Guard Base, Arizona
* 197th Air Refueling Squadron
* 168th Air Refueling Wing – Eielson AFB, Alaska
* 168th Air Refueling Squadron
* 171st Air Refueling Wing – Pittsburgh IAP Air Reserve Station, Pennsylvania
* 146th Air Refueling Squadron
* 147th Air Refueling Squadron
* 185th Air Refueling Wing – Sioux City, Iowa
* 174th Air Refueling Squadron
* 186th Air Refueling Wing – Meridian, Mississippi
* 153d Air Refueling Squadron
* 190th Air Refueling Wing – Topeka, Kansas
* 117th Air Refueling Squadron
* Meta Aerospace operates 4 KC-135Rs.[57] These aircraft were purchased from the Republic of Singapore Air Force when the latter retired them in 2019. They were delivered in late 2020.[58]

Note Italy has been reported in some sources as operating several KC-135s,[59] however these are actually Boeing 707-300s converted to tanker configuration.[60][61]

### Former operators[edit | edit source]

Singapore

* Republic of Singapore Air Force operated 4 former USAF KC-135R tankers, first delivered September 10, 1999;[62] they were occasionally used as VIP, aeromedical transports[citation needed] and military support.[63] The aircraft were retired in June 2019, having been replaced in service by 6 Airbus A330 MRTTs. They were subsequently purchased by private US defence services company Meta Aerospace in October 2020.[58]

File:Flag of the United States.svg United States

* NASA (until 2004)
* United States Air Force
* 6th Air Refueling Wing – MacDill AFB, Florida
* 911th Air Refueling Squadron – Seymour-Johnson AFB, North Carolina (Associate with 916th ARW)
* 22d Air Refueling Wing – McConnell AFB, Kansas
* 344th Air Refueling Squadron
* 97th Air Mobility Wing – Altus Air Force Base, Oklahoma
* 55th Air Refueling Squadron (1994-2009)[64]
* 916th Air Refueling Wing – Seymour Johnson AFB, North Carolina
* 77th Air Refueling Squadron
* 931st Air Refueling Group – McConnell AFB, Kansas (Associate with 22d ARW)
* 924th Air Refueling Squadron
* Air National Guard
* 107th Air Refueling Wing – Niagara Falls ARS, New York
* 136th Air Refueling Squadron (1994–2008)[65]
* 121st Air Refueling Wing – Rickenbacker ANGB, Ohio
* 145th Air Refueling Squadron (1975–2013)[66]
* 137th Air Refueling Wing – Tinker AFB, Oklahoma
* 185th Air Refueling Squadron (2008–2015)[67][68]
* 157th Air Refueling Wing – Pease ANGB, New Hampshire
* 133d Air Refueling Squadron (1975–2019)[69][70]
* 163rd Air Refueling Wing – March ARB, California
* 196th Air Refueling Squadron (1993–2006)[71]
* 184th Air Refueling Wing – McConnell AFB, Kansas
* 127th Air Refueling Squadron (2002–2008)[72]
* 189th Air Refueling Wing – Little Rock AFB, Arkansas
* 154th Air Refueling Squadron (1973–1986)[73]

## Accidents[edit | edit source]

For accidents involving other C-135 variants, see Boeing C-135 Stratolifter, Boeing RC-135, Boeing EC-135, Boeing NC-135, and Boeing WC-135 Constant Phoenix.

As of 2020, 52 Stratotankers have been lost to accidents during the over sixty years of service, involving 385 fatalities.

27 June 1958
USAF KC-135A, serial number 56-3599, stalled and crashed at Westover Air Force Base after the crew failed to extend the flaps on takeoff, killing all 15 on board. The aircraft was attempting a world speed record between New York and London.[74]
31 March 1959
USAF KC-135A, 58-0002, entered a thunderstorm near Killeen, Texas. Two engines separated and one of the engines struck the tail, causing loss of control. The aircraft crashed on a hillside, killing all four crew on board. The aircraft had been delivered just six weeks before the accident.[75]
15 October 1959
USAF KC-135A, 57-1513, collided in mid-air with B-52F 57-0036 at 32,000 feet (9,800 m) over Leitchfield, Kentucky, killing all six on board both aircraft.[76]
3 February 1960
USAF KC-135A, 56–3628, crashed on takeoff in extremely gusty crosswind conditions at Roswell-Walker AFB, NM. The airplane skidded into two other KC-135 tankers (57-1449 and 57–1457) and a hangar and burst into flames. The aircraft was on a training flight, but the instructor pilot was occupying the jump seat instead of one of the pilot seats as directed by the local commander. The destruction of three aircraft, along with the death of all six in the crew plus an additional two deaths on the ground made this a unique mishap.[77]
18 November 1960
USAF KC-135A, 56-3605, crashed on landing at Loring Air Force Base due to an excessive sink rate, killing one of 17 on board.[78]
9 May 1962
USAF KC-135A, 56-3618, crashed on takeoff from Loring Air Force Base due to engine failure, killing all six on board.[79]
8 August 1962
USAF KC-135A, 55-3144, crashed on approach to Runway 11 at Hanscom Field in Bedford, Massachusetts, killing all three on board. Stock footage of this same aircraft had been used during the opening credits of the film Dr. Strangelove.
10 September 1962
USAF KC-135A, 60-0352 on a flight from Ellsworth Air Force Base to Fairchild Air Force Base crashed into a mountain just 20 miles (32 km) northeast of Spokane, Washington. The flight hit fog on approach to the air base and hit Mount Kit Carson, a 5,271 ft (1,607 m) mountain. The crash killed all four crew and 40 passengers on board.[80]
27 February 1963
USAF KC-135A, 56-3597, crashed on takeoff at Eielson Air Force Base due to engine separation, killing all seven on board; two on the ground died when debris from the crash struck a guard house and nearby waiting room.[81]
21 June 1963
USAF KC-135A-BN Stratotanker, 57-1498 out of Westover AFB crashed on approach during a training flight in a wooded area near Belchertown, MA. One of the four occupants was killed.[82]
28 August 1963
USAF KC-135A, 61-0322, collided in mid-air with KC-135A 61-0319 300 miles (480 km) west of Bermuda, killing all 11 on board both aircraft.[83][84]
8 July 1964
USAF KC-135A, 60-0340, collided in mid-air with F-105 Thunderchief 61-0091 during in-flight refueling over Death Valley, California, killing all five on board both aircraft.[85]
4 January 1965
USAF KC-135A, 61-0265, crashed on climbout from Loring Air Force Base after two engines separated, killing all four on board.[86]
16 January 1965
USAF KC-135A 57-1442, crashed after its rudder control system suffered a malfunction[87] shortly after takeoff from McConnell Air Force Base, Kansas.[88] The fuel-laden plane crashed in northeast Wichita at a street intersection and caused a considerable fire. A total of 30 were killed, including 23 on the ground and the seven member crew.[89]
26 February 1965
USAF KC-135A, 63-8882, collided in mid-air with B-47E 52-0171 over the Atlantic Ocean, killing all eight on board both aircraft.[90]
3 June 1965
USAF KC-135A, 63-0842, lost electrical power on takeoff and crashed at Walker Air Force Base, killing all five on board.[91]
17 January 1966
A fatal collision occurred between a B-52G, 58-0256, and a KC-135A, 61-0273, flying out of Moron AB, Spain while flying over Palomares, Spain. The B-52G was on an Operation Chrome Dome mission, which required multiple air refuelings.[92] The mishap caused both aircraft to break up in mid-air and killed all four crew members on the KC-135A and three of the seven on the B-52G, while causing radiological contamination, as nuclear weapons had to be recovered from on land and at sea, nearby.[93]
19 May 1966
USAF KC-135A, 57-1444, of 4252nd Strategic Wing, crashed on takeoff from Kadena Air Base, killing all 11 on board as well as a motorist on nearby Highway 16. The aircraft was bound for Yokota Air Base to repair a KC-135 when it lifted off too soon during a heavy-weight takeoff.[94]
19 January 1967
USAF KC-135A, 56-3613, crashed into Shadow Mountain, foothill of Mount Spokane (elevation 4,340 ft (1,320 m) MSL) while descending towards Fairchild Air Force Base, killing all nine on board.[95]
17 January 1968
USAF KC-135A, 58-0026, stalled and crashed at Minot Air Force Base after the pilot overrotated the aircraft during takeoff in a snowstorm, killing all 13 on board including the 15th Air Force Vice Commander MGen Charles Eisenhart. This accident was instrumental in the decision to refit the KC-135 fleet with the Collins FD-109(V) integrated flight director system, in place of the earlier "round dial" cockpit layout.[96]
30 July 1968
USAF KC-135A, 56-3655, crashed on Mount Lassen after the vertical stabilizer broke off after a sharp turn while practicing an emergency descent, killing all nine on board.[97]
24 September 1968
USAF KC-135A, "55-3133A", crashed on landing at Wake Island, Micronesia. Aircraft developed engine problems while en route from Andersen AFB, Guam to Hickam AFB, HI and during landing at Wake Island the aircraft contacted the surface of the water and bounced onto the east end of the runway.[98] There were 11 fatalities out 56 persons on board.[99]
1 October 1968
USAF KC-135A, 55-3138, struck concrete and steel light poles on takeoff and crashed at U-Tapao Airport, Thailand after a loss of power in an engine and resultant loss of control, killing all four on board.[100]
22 October 1968
USAF KC-135A, 61-0301, flew into a mountain while descending to Ching Chuan Kang Air Base, Taiwan, killing all six on board.[101]
19 December 1969
USAF KC-135A, 56-3629, crashed into the sea on climbout from Ching Chuan Kang Air Base due to low-level windshear, killing all four on board.[102]
3 June 1971
USAF KC-135Q, 58-0039, exploded in mid-air and crashed at Centenera, Spain, killing all five on board.[103]
13 March 1972
KC-135A, 58-0048, crashed while landing at Carswell AFB. Its right wing struck the ground, which led to the airplane exploding and killing all 5 on board.[104]
8 March 1973
USAF KC-135A, 63-7989, collided with KC-135 63-7980 on the ramp at Lockbourne Air Force Base and caught fire, killing two of five on board.[105]
7 December 1975
USAF KC-135A, 60-0354, from Plattsburgh AFB, NY, crashed after takeoff at Eielson AFB, AK, killing all four crewmembers.[106] Launch was delayed because of problems with the receiver aircraft. The KC-135 was required to sit at the end of the runway in extremely cold weather, without heat, with engines shut down. Repeated requests for a mobile heat source were denied by the command post. Landing gear failed to retract after takeoff. Crewmembers may have suffered from hypothermia.[107]
6 February 1976
USAF KC-135A, 60-0368, flew into a mountain while descending to Torrejon Air Base, Spain, killing all seven on board. The aircraft was assigned to the 410th BMW/46th AREFS at K.I. Sawyer AFB, Michigan, but, as is often the case on Tanker Task Force deployed operations, the flight crew was from another SAC unit at Seymour-Johnson AFB, NC.[108] Only two aircraft crew chiefs on board were from K I Sawyer AFB, MI.[109]
26 September 1976
USAF KC-135A, 61-0296, crashed while on approach to Wurtsmith Air Force Base, Michigan, killing 15 passengers and flight crew on board. The aircraft was flying a "First Team" mission taking 10 passengers to HQ-Strategic Air Command for briefings and orientation. The crew became distracted by a cabin pressurization problem after an intermediate stop and descended into a wooded area about 12 miles (19 km) southwest of Alpena, Michigan. There was one survivor, reportedly a crew chief who was in the boom operator aft station (boom pod) at the time of the crash.[110]
29 April 1977
USAF KC-135A, 58-0101 from Castle AFB hit five or six cows while practicing night takeoffs and landings at Beale AFB. Takeoff was aborted and the plane overran the runway and caught on fire. Of the crew of 7, there were no fatalities. During that time cattle strayed through a broken fence from a nearby field and onto the runway.[110]
19 September 1979
USAF KC-135A, 58-0127, from Castle AFB crashed on the runway during a simulated engine failure on a training flight, killing 15 of 20 occupants on board.[110]
13 March 1982
Arizona ANG KC-135A, 57-1489 collided in mid-air with a civilian Grumman-American AA-1 Yankee near Luke AFB, AZ. The collision, which occurred as the tanker was descending on an IFR flight plan through an undercast, was struck by the civilian aircraft operating VFR just below the cloud deck, causing the tail of the KC-135 to be severed by the force of the impact. The two civilians on the AA-1 and all four crew on the KC-135 were killed. Included among the dead was the squadron commander of the 197th AREFS, Lt Col James N. Floor.[111]
19 March 1982
USAF KC-135A, 58-0031, exploded in mid-air at 13,700 feet (4,200 m) and crashed at Greenwood, Illinois, due to a possible overheated fuel pump, killing all 27 on board.[112]
19 March 1985
USAF 8th AF KC-135A 61-0316 caught fire during ground refueling at Cairo International Airport (CAI), Cairo, Egypt. The interior of the airplane was burned out and the aircraft was written off as damaged beyond repair although the wing structure was used in repairing KC-135A 58-0014 (which was later converted to a KC-135E). There were no injuries reported.[113]
28 August 1985
USAF KC-135A 59-1443 was damaged beyond repair when a student pilot allowed an engine to contact the runway during a landing attempt at Beale Air Force Base near Marysville, California. During the go-around the instructor lost control of the aircraft while performing checklist items for an in-flight fire. All seven (three instructors and four students) aboard the aircraft died in the crash.[114]
17 June 1986
USAF KC-135A,63-7983, crashed while en route to Howard AFB, Panama. It struck a hill south of the nearby Rodman Naval Station, killing all four crew members on board.[115] The tanker and crew were based at Grissom Air Force Base, Indiana.[116]
13 March 1987
USAF KC-135A, 60-0361, crashed at Fairchild Air Force Base after encountering wake turbulence from a B-52, while practicing a low-level refueling display. The aircraft rolled 80 degrees to the left, which stalled both left side engines (#1 and #2). The crew was able to recover to wings level, but were too low and impacted the ground in an open area of the base. The accident killed all six on board and one person on the ground.[117][118]
11 October 1988
USAF KC-135A, 60-0317, crashed at Wurtsmith Force Base after a hard landing following a steep approach during crosswinds. The airplane went off the side of the runway and broke up. A fire erupted and killed all six crewmembers on board, while 10 passengers were able to jump to safety.[119] Pilot error was determined as the cause of the accident.[120]
20 November 1988
USAF KC-135 suffered a failure of a sighting window next to the sextant port in the cockpit during a trans-Atlantic flight. A boom operator died when he was sucked partway through the 10-inch by 8-inch window opening as the cockpit depressurized. None of the 17 others on board were injured.[121]
31 January 1989
USAF KC-135A, 63-7990, crashed on takeoff from Dyess AFB, TX after the water-injection system for the Pratt & Whitney J-57 engines failed and the remaining "dry" thrust was insufficient for flight at the takeoff gross weight. The mission was scheduled as a non-stop flight to Hickam AFB/Honolulu HI with an en route F-16 air refueling mission. 7 crew members and 12 passengers, including military spouses, retired military members and one child, were killed.[122] The aircraft and crew were based at K I Sawyer AFB, MI.[108]
20 September 1989
USAF KC-135E, 57-1481, exploded on the ground at Eielson Air Force Base due to an overheated fuel pump, killing two of seven on board. The crew was shutting down the engines when the explosion occurred.[123]
4 October 1989
KC-135A, 56-3592, from en route from Loring Air Force Base crashed into a hill along the west side of Trans-Canada Highway 2 at Carlingford, New Brunswick due to an overheated fuel pump, killing all four crew members.[124] After five accidents involving fuel pump overheating, crews were to keep 3,000 pounds (1,400 kg) of fuel in the tank.[125]
11 January 1990
KC-135E, 59-1494, caught fire on the tarmac at Pease Air National Guard Base during maintenance work; there were no injuries, however the aircraft was destroyed.[126][127][128]
6 February 1991
KC-135E, call sign "Whale 05", 58-0013 , flown by Maj. Kevin Sweeney (pilot), Capt. Jay Selanders (co-pilot), Capt. Greg Mermis (navigator), and Senior Master Sgt. Steve Stucky (boom operator), during the Gulf War, after entering severe wake turbulence from a passing KC-135, the plane lost both engines from under the left wing. The crew landed it successfully and it was later returned in service. The entire crew received the Distinguished Flying Cross for their actions. This accident was covered in Air Disasters episode "Mission Disaster" in 2021.[129][130]
10 December 1993
a Wisconsin Air National Guard KC-135R, 57-1470, exploded while undergoing routine ground maintenance at General Mitchell Air National Guard Base due to an overheated fuel pump. Six NCO maintenance personnel were killed.[131][132]
13 January 1999
Washington Air National Guard KC-135E, 59-1452, crashed on approach in Geilenkirchen, Germany due to the horizontal stabilizer being in a 7.5 nose-up trim condition, killing all 4 crew members.[133]
7 April 1999
Air National Guard KC-135R, 57-1418, was damaged beyond repair while undergoing a cabin pressurization check while in depot maintenance at the Oklahoma City Air Logistics Center at Tinker AFB, Oklahoma. During a previous maintenance event, the pressure relief valves were secured shut and not released afterwards. This created a catastrophic explosion that nearly separated the empennage from the aircraft and destroyed the aft fuselage section. No personnel were injured or killed during the mishap, but the aircraft was a total loss.[134]
26 September 2006
USAF KC-135R, 63-8886, was damaged beyond economical repair when it was struck by a Tupolev Tu-154 of Altyn Air, EX-85718, while stopped on a taxiway after landing at Manas Air Base. As the Tu-154 took off, its right wing struck the fairing of the KC-135R's No. 1 engine. The force of the impact nearly severed the No. 1 engine and destroyed a portion of the left wing. The resulting fire caused extensive damage to the KC-135. The Tu-154 lost about 6 feet (1.8 m) of its right wingtip, but was able to get airborne and return to the airport for an emergency landing. The tanker crew had been directed to use a taxiway which was not usable for night operations and the controller failed to note that they reported "holding short" of that taxiway, rather than "clear of" that point. The crew of the KC-135 evacuated the aircraft without serious injuries.[135]
3 May 2013
A McConnell AFB, KS (USAF) KC-135R, 63-8877, flown by a Fairchild AFB, Washington aircrew, broke up in flight about eight minutes after taking off from Manas Air base in Kyrgyzstan, killing all three crew members.[136][137] After investigation, it was determined that a rudder power control unit malfunction led to a Dutch roll oscillatory instability. Not recognizing the Dutch roll, the crew used the rudder to stay on course, which exacerbated the instability, leading to an unrecoverable flight condition. The over-stressed tail section detached and the aircraft broke apart soon after. The aircraft was at cruise altitude about 200 km west of Bishkek before it crashed in a mountainous area near the village of Chorgolu, close to the border between Kyrgyzstan and Kazakhstan.[138][139][140][141]

## Aircraft on display[edit | edit source]

* 55-3118 The City of Renton – KC-135A on static display at the entrance to McConnell Air Force Base, Kansas. It was the first aircraft built and was used in a variety of test roles. It was later converted to an EC-135K before reverting to a tanker configuration.[142]
* 55-3130 Old Grandad – KC-135A on static display at the March Field Air Museum, March ARB, California.[143]
* 55-3139 City of Atwater – KC-135A on static display at the Castle Air Museum at the former Castle AFB, California.[144][145]
* 56-3595 – KC-135A on static display at the Barksdale Global Power Museum at Barksdale Air Force Base, Louisiana.[146][147]
* 56-3611 – KC-135E on static display Scott Field Heritage Air Park at Scott Air Force Base, Illinois.[148][149][150]
* 56-3639 – KC-135A on static display at the Linear Air Park at Dyess Air Force Base, Texas.[151]
* 56-3658 Iron Eagle – KC-135E on static display at the Kansas Aviation Museum.[152][153]
* 57-1429 – KC-135E on static display at the Museum of the Kansas National Guard at Forbes Field Air National Guard Base in Kansas.[154][155]
* 57-1458 – KC-135E on static display at Eielson Air Force Base, Alaska.[156][157]
* 57-1495 – KC-135E in storage at Lincoln Air National Guard Base, Nebraska.[158][159]
* 57-1507 – KC-135E on static display at the Air Mobility Command Museum at Dover Air Force Base, Delaware.[160]
* 57-1510 Never Forget – KC-135E on static display at the Hill Aerospace Museum at Hill Air Force Base, Utah.[161]
* 59-1481 – KC-135A on static display at Ellington Field Joint Reserve Base, Texas. It was operated by NASA as N930NA and one of two KC-135s used for zero-gravity and other research purposes.[162]
* 59-1487 – KC-135E on static display at the 126th Air Refueling Wing / Illinois Air National Guard complex at Scott Air Force Base.[163][164]
* 59-1497 – KC-135E on static display at Joint Base McGuire-Dix-Lakehurst, New Jersey.[165][166]
* 60-0329 – KC-135R stored at the National Museum of the United States Air Force in Dayton, Ohio, pending future display.[167]
* 63-7998 – KC-135A on static display at the Pima Air & Space Museum, adjacent to Davis-Monthan AFB, Arizona. It was operated by NASA as N931NA and is the second of their two research aircraft.[168]
* 63-8005 – KC-135A on static display at Grand Forks AFB, North Dakota.

## Specifications (KC-135R)[edit | edit source]

File:Usaf.kc135.taildetail.fairford.arp.jpg

Tail of an Air Force Reserve Command KC-135R tanker showing refueling boom

File:US Navy 090429-N-9062E-001 An F-A-18F Super Hornet from the.jpg

Boom-drogue adapter refueling a U.S. Navy F/A-18F Super Hornet

Data from USAF Fact Sheet,[20] Boeing.com : KC-135[169]

General characteristics

* Crew: 3 (pilot, co-pilot and boom operator; some KC-135 missions require the addition of a navigator.)
* Capacity: up to 80 passengers / 83,000 lb (38,000 kg) or 6 463L pallets
* Length: 136 ft 3 in (41.53 m)
* Wingspan: 130 ft 10 in (39.88 m)
* Height: 41 ft 8 in (12.70 m)
* Wing area: 2,433 sq ft (226.0 m2)
* Airfoil: root: BAC 310/311/312; tip: BAC 313[170]
* Empty weight: 98,392 lb (44,630 kg)

* Operating empty weight: 124,000 lb (56,245 kg)
* Gross weight: 297,000 lb (134,717 kg)
* Max takeoff weight: 322,500 lb (146,284 kg)
* Fuel capacity: 200,000 lb (90,718 kg)
* Powerplant: 4 × CFM International F108-CF-100 turbofan engines, 21,600 lbf (96.2 kN) thrust each

Performance

* Maximum speed: 504 kn (580 mph, 933 km/h)
* Maximum speed: Mach 0.9
* Cruise speed: 460.5 kn (529.9 mph, 852.8 km/h) at 30,000 ft (9,144 m)
* Range: 1,303.5 nmi (1,500.0 mi, 2,414.1 km) with 150,000 lb (68,039 kg) of transferable fuel
* Ferry range: 9,572 nmi (11,015 mi, 17,727 km)
* Service ceiling: 50,000 ft (15,000 m)
* Rate of climb: 4,900 ft/min (25 m/s)

## See also[edit | edit source]

* Vomit Comet - Fixed-wing aircraft that provides brief near-weightless environments - Fixed-wing aircraft that provides brief near-weightless environments
* 1966 Palomares B-52 crash - 1966 collision between a USAF B-52G and KC-135 over the Mediterranean Sea off the coast of Spain - 1966 collision between a USAF B-52G and KC-135 over the Mediterranean Sea off the coast of Spain
* List of United States military aerial refueling aircraft

Related development

* Boeing 367-80 - 1954 American quadjet prototype aircraft - 1954 American quadjet prototype aircraft
* Boeing C-135 Stratolifter - Military transport aircraft by Boeing - Military transport aircraft by Boeing
* Boeing C-137 Stratoliner - VIP transport aircraft derived from the Boeing 707 - VIP transport aircraft derived from the Boeing 707
* Boeing 707 - Narrow-body jet airliner family - Narrow-body jet airliner family

Aircraft of comparable role, configuration, and era

* Airbus A310 MRTT - Airbus A310 Multi-Role Tanker Transport (MRTT) air to air refuelling tanker / transport aircraft - Airbus A310 Multi-Role Tanker Transport (MRTT) air to air refuelling tanker / transport aircraft
* Airbus A330 MRTT - Aerial refuelling tanker aircraft - Aerial refuelling tanker aircraft
* EADS/Northrop Grumman KC-45 - Proposed aerial refueling tanker aircraft - Proposed aerial refueling tanker aircraft
* Airbus CC-150 Polaris - Canadian military transport aircraft - Canadian military transport aircraft
* Boeing KC-767 - 2000s American military tanker/transport aircraft - 2000s American military tanker/transport aircraft
* Boeing KC-46 Pegasus - 2010s American military aerial refueling and transport aircraft - 2010s American military aerial refueling and transport aircraft
* Ilyushin Il-78 - Soviet/Russian aerial refueling tanker - Soviet/Russian aerial refueling tanker
* Lockheed L-193 - Aircraft development - Aircraft development
* Lockheed Martin KC-130 - Aerial refueling tanker based on Lockheed Martin C-130 - Aerial refueling tanker based on Lockheed Martin C-130

## References[edit | edit source]

1. ^ The nine military fixed-wing aircraft with over 60 years of continuous service are Boeing B-52 Stratofortress bomber (1955); Lockheed C-130 Hercules cargo & troop transporter (1956); Tupolev Tu-95 bomber (1956); Boeing KC-135 "Stratotanker" mid-air refueller (1957); Lockheed U-2 "Dragon Lady" reconnaissance (1957); Ilyushin Il-18 transport (1958); Antonov An-12 transport & patrol (1959); Northrop T-38 Talon jet trainer (1961); and Lockheed P-3 Orion naval & submarine surveillance (1962). There is also one helicopter: Boeing CH-47 Chinook (1962).
2. ^ Lombardi, Michael (July 2006). "Historical Perspective, Start of a PROUD MISSION" (PDF). Boeing Frontiers. Chicago, Illinois: Boeing. Archived (PDF) from the original on 12 June 2014. Retrieved 21 October 2014.
3. ^ Bright, Charles (January 1986). "VII - The Heartbreak Market: Airliners". The Jet Makers: The Aerospace Industry from 1945–1972. Lawrence, Kansas: University Press of Kansas. ISBN 978-0700601721. Retrieved 21 October 2014.
4. ^ Hopkins, III, Robert S. (1997). Boeing KC-135 Stratotanker: More Than Just a Tanker. Leicester, England: Midland Publishing Limited. ISBN 1-85780-069-9.
5. ^ May, Mike (Spring 2004). "Gas Stations in the Sky". Invention & Technology. American Heritage Society. Archived from the original on 27 April 2010. Retrieved 21 October 2014.
6. ^ a b Beckham, SSgt Tim (25 September 2009). "Final KC-135E retires at Davis-Monthan". Archived from the original on 2 November 2014. Retrieved 21 October 2014.
7. ^ "KC-135 Stratotanker". boeing.com. Boeing. June 2011. Archived from the original on 29 June 2011. Retrieved 21 October 2014.
8. ^ The noise reduction of 27 dB means the resultant sound pressure level is about 5% of the original level.
9. ^ a b c "KC-135E". globalsecurity.org. GlobalSecurity.org. Archived from the original on 6 October 2014. Retrieved 21 October 2014.
10. ^ Curtin, Neal P. (24 June 2003). Testimony Before the Subcommittee on Projection Forces, Committee on Armed Services, House of Representatives; Military Aircraft: Information on Air Force Aerial Refueling Tankers (PDF) (Report). General Accounting Office. Archived (PDF) from the original on 24 September 2015. Retrieved 21 October 2014. "According to Air Force data, the KC-135 fleet had a total operation and support cost in fiscal year 2001 of about $2.2 billion. The older E model aircraft averaged total costs of about $4.6 million per aircraft, while the R models averaged about $3.7 million per aircraft. Those costs include personnel, fuel, maintenance, modifications, and spare parts."
11. ^ "Boeing KC-135 - Rockwell Collins Pacer CRAG Avionics Upgrade". Jane's Aircraft Upgrades. London, England: Janes Information Group. 7 March 2012. Archived from the original on 16 June 2012. Retrieved 21 October 2014.
12. ^ "BAE SYSTEMS delivers final Pacer CRAG KC-135". Aerotech News and Review. Lancaster, California: Aerotech News and Review, Inc. 20 September 2002.
13. ^ USAF receives new Block 45 upgrade KC-135 Stratotanker Archived 27 March 2018 at the Wayback Machine, Srivari Aishwarya, Air Force Technology, 26 January 2017.
14. ^ Davis, Greg L. "KC-135 MOD program closes out year with magic number: Block 45" Archived 28 March 2018 at the Wayback Machine, 72nd Air Base Wing Public Affairs, 24 January 2017.
15. ^ Graham, Richard (1996). SR-71 Revealed: The Untold Story. pp. 38–39. ISBN 0760301220.
16. ^ Hopkins, pp. 71–72.
17. ^ "KC-135R Stratotanker". GlobalSecurity.org. Archived from the original on 8 October 2014. Retrieved 21 October 2014.
18. ^ "Boeing: Commercial Airplanes - 707 - 707 Family Home". Boeing.com. Boeing. Archived from the original on 26 February 2013. Retrieved 21 October 2014.
19. ^ a b HQ USSTRATCOM/CSH (January 2004). History of the United States Strategic Command, June 1, 1992 — October 1, 2002 (PDF) (Report). United States Strategic Command. p. 21\. Archived from the original (PDF) on 6 March 2016. Retrieved 23 October 2014. "[...] a similar ceremony [at Scott AFB] marked the inactivation of MAC and the activation of the new Air Mobility Command (AMC), which now assumed responsibility for SAC's KC-135 and KC-10 air refueling aircraft."
20. ^ a b c "KC-135 Stratotanker". AF.mil. US Air Force. 14 May 2018. Archived from the original on 24 September 2021. Retrieved 28 September 2021.
21. ^ "Boeing KC-135 Celebrates 50 Years of Service". aahs-online.org. American Aviation Historical Society. 2009. Archived from the original on 22 December 2014. Retrieved 23 October 2014.
22. ^ Armstrong, Brandice J. (12 September 2006). "Airman celebrates different KC-135 anniversary". USAF News. 72d Air Base. Archived from the original on 4 November 2014. Retrieved 23 October 2014.`{{cite news}}`: CS1 maint: location (link)
23. ^ Opall-Rome, Barbara (29 April 2013). "Israelis Slam US-Hyped Arms Package". Defense News. Gannett Government Media Corporation. Archived from the original on 28 June 2013. Retrieved 30 April 2013.
24. ^ Pellerin, Cheryl (22 April 2013). "Hagel, Yaalon Finalize New Israel Military Capabilities". American Forces Press Service. Pentagon. Archived from the original on 30 April 2013. Retrieved 22 April 2013.
25. ^ Egozi, Arie (2 September 2013). "Israel seeks R-model KC-135s from USA". flightglobal.com. Archived from the original on 23 October 2014. Retrieved 23 October 2014.
26. ^ "NASA Dryden Flight Research Center, KC-135 Stratotanker Photo Collection". dfrc.nasa.gov. NASA. Archived from the original on 3 February 2007. Retrieved 23 October 2014.
27. ^ Heilig, Jennings (8 September 2002). "C-135 Variants - Part 2". clubhyper.com. Archived from the original on 23 September 2015. Retrieved 23 October 2014.
28. ^ Heilig, Jennings (8 September 2002). "C-135 Variants - Part 6". clubhyper.com. Archived from the original on 23 September 2015. Retrieved 23 October 2014.
29. ^ Hebert, Adam J. (January 2003). "When Aircraft Get Old". Air Force Magazine. Arlington, Virginia: Air Force Association. Archived from the original on 26 February 2003. Retrieved 23 October 2014.
30. ^ MILITARY AIRCRAFT: DOD Needs to Determine its Aerial Refueling Aircraft Requirements (Report). US General Accounting Office. 4 June 2004. p. 3\. GAO-04-349. Archived from the original on 23 October 2014. Retrieved 23 October 2014. "Operations and support costs for the KC-135 fleet are estimated to grow from about $2.2 billion in fiscal year 2003 to $5.1 billion (fiscal year 2003 dollars) in fiscal year 2017, an increase of $2.9 billion, or over 130 percent, which represents an annual growth rate of about 6.2 percent."
31. ^ "Opening Statement of Chairman Roscoe Bartlett, Hearing on the Aerial Refueling Recapitalization Program" (PDF) (Press release). Washington, D.C.: globalsecurity.org. 28 February 2006. Archived (PDF) from the original on 24 September 2015. Retrieved 23 October 2014.
32. ^ "Thin Skin". Aviation Week & Space Technology. Penton Media. 70 (10): 18. 9 March 2000. Archived from the original on 25 October 2014. Retrieved 23 October 2014.
33. ^ Tirpak, John A. (February 2004). "Tanker Twilight Zone". Air Force Magazine. Arlington, Virginia: Air Force Association. Archived from the original on 6 February 2004. Retrieved 23 October 2014.
34. ^ "Air Force Posts Request for Proposals for Tankers" (Press release). US Department of Defense. 30 January 2007. Archived from the original on 1 December 2009. Retrieved 23 October 2014.
35. ^ "Tanker Contract Award Announced". Air Force Print News. 29 February 2008. Archived from the original on 4 November 2014. Retrieved 23 October 2014.
36. ^ Gilmore, Gerry J. (29 February 2008). "Air Force Awards Tanker Contract to Northrop Grumman". American Forces Press Service. Archived from the original on 23 October 2014. Retrieved 23 October 2014.
37. ^ Miller, Kent; Putrich, Gayle S.; Tran, Pierre (29 February 2008). "Tanker Contract Decision Announced". Army Times. Springfield, Virginia. Retrieved 23 October 2014.
38. ^ "Boeing Protests U.S. Air Force Tanker Contract Award" (Press release). St Louis, Missouri: Boeing. 11 March 2008. Archived from the original on 23 October 2014. Retrieved 23 October 2014.
39. ^ Gary L. Kepplinger, General Counsel (18 June 2008). "B-311344; B-311344.3; B-311344.4; B-311344.6; B-311344.7; B-311344.8; B-311344.10; B-311344.11, The Boeing Company, June 18, 2008". Archived from the original on 23 October 2014. Retrieved 23 October 2014.
40. ^ "KC-X Tanker Modernization Program, Solicitation Number: FA8625-10-R-6600" (Press release). US Department of Defense. 8 February 2010. Archived from the original on 23 October 2014. Retrieved 23 October 2014.
41. ^ Reed, John (25 February 2010). "USAF Sets KC-X First Flight, IOC Dates". Defense News. Springfield, Virginia. Archived from the original on 29 May 2012. Retrieved 23 October 2014.
42. ^ Riley, Charles (24 February 2011). "Air Force awards Boeing $35 billion contract". CNN. Archived from the original on 28 February 2011.
43. ^ "U.S. Air Force Accepts First Boeing KC-46A Pegasus Tanker Aircraft" (Press release). Boeing. 10 January 2019. Archived from the original on 10 January 2019. Retrieved 28 January 2019.
44. ^ Chuanren, Chen (2 December 2018). "Singapore Officially Unveils A330 MRTT". AINOnline. Archived from the original on 2 December 2018. Retrieved 19 July 2022.
45. ^ Cenciotti, David (6 July 2018). "Here Are The Very First Photos Of The New A330 Multi-Role Tanker Transport In French Air Force Livery". The Aviationist. Archived from the original on 9 August 2018. Retrieved 19 July 2022.
46. ^ a b "KC-135". US Warplanes.net. Archived from the original on 5 February 2013. Retrieved 17 December 2012.
47. ^ a b Donald, David. "Boeing Model 717 (C/KC-135 Stratoliner/Stratotanker)." The Complete Encyclopedia of World Aircraft. Barnes & Noble Books, 1997. ISBN 0-7607-0592-5.
48. ^ a b Office of the Under Secretary of Defense for Acquisition and Sustainment (31 August 2018). "DoD 4120.15-L: Model Designation of Military Aerospace Vehicles" (PDF). DoD Washington Headquarters Services. DoD. Archived (PDF) from the original on 12 November 2020. Retrieved 28 September 2021.
49. ^ a b Hopkins, p.144
50. ^ Pither, Page 73
51. ^ Hopkins, pp. 142–144.
52. ^ Pither, p. 73.
53. ^ Baker, MSgt Burke. "48-year-old KC-135 retires" Archived 11 June 2008 at the Wayback Machine, Air Force news, 22 May 2008.
54. ^ a b Hopkins III, Robert S. (2017). The Boeing KC-135 Stratotanker; More Than a Tanker. Crecy Publishing Limited. pp. 114–117. ISBN 978-1-91080-901-3.
55. ^ "Llegó el 1er KC-135E para la FACh - ModoCharlie". modocharlie.com. 16 February 2010. Archived from the original on 24 March 2017. Retrieved 26 April 2018.
56. ^ "2017 USAF Almanac, Fact and Figures" Archived 26 April 2018 at the Wayback Machine. Air Force Magazine, May 2017.
57. ^ "Meta Strategic Mobility". Meta Aerospace. Retrieved 25 November 2021.
58. ^ a b "RSAF KC-135Rs find new home with US firm Meta Aerospace". flightglobal.com. 1 October 2020. Retrieved 25 November 2021.
59. ^ "Boeing wins Italian bid military 767s", Italy operates 4 KC-135s, SeattlePi.com, 10 July 2001
60. ^ "Aeroflight's listing of Italian Air Force aircraft". Archived from the original on 27 April 2008.
61. ^ "Airframe tracking information from Airlinerlist.com". airlinerlist.com. Archived from the original on 1 October 2017. Retrieved 26 April 2018.
62. ^ "Boeing: Boeing Delivers First KC-135R to Singapore Air Force". Archived from the original on 14 October 2007.
63. ^ "Singapore to join coalition against Islamic State". AFP. Archived from the original on 4 November 2014. Retrieved 4 November 2014.
64. ^ "Chronology of Altus Air Force Base". Retrieved 24 October 2022.
65. ^ "107th Air Refueling Wing Bids Veteran Tanker Aircraft Goodbye". New York State: Division of Military and Naval Affairs. 23 January 2008. Retrieved 22 May 2021.
66. ^ "End of an Era". 121st Air Refueling Wing. 24 September 2013. Retrieved 22 May 2021.
67. ^ "Total Force Tinker to Get New Facility". Air Force Magazine. 22 September 2008. Retrieved 22 May 2021.
68. ^ Campbell, Micah (10 July 2015). "Oklahoma's 137th Air Refueling Wing closes one chapter before moving to next mission". National Guard. Retrieved 22 May 2021.
69. ^ "Granite Wings: The N.H. Air National Guard's History book – 1947-1998" (PDF). New Hampshire Air National Guard. Retrieved 22 May 2021.
70. ^ "End of an Era". 157th Air Refueling Wing. 28 March 2019. Retrieved 22 May 2021.
71. ^ "History". 163d Attack Wing. Retrieved 22 May 2021.
72. ^ "The History of the 184th Wing". 184th Wing. Retrieved 22 May 2021.
73. ^ "Factsheets: 189th Airlift Wing". 189th Airlift Wing. 20 October 2008. Archived from the original on 4 March 2016. Retrieved 22 May 2021.
74. ^ Accident description for 56-3599 at the Aviation Safety Network
75. ^ Accident description for 58-0002 at the Aviation Safety Network
76. ^ Accident description for 57-1513 at the Aviation Safety Network
77. ^ Accident description for 56-3628 at the Aviation Safety Network
78. ^ Accident description for 56-3605 at the Aviation Safety Network
79. ^ Accident description for 56-3618 at the Aviation Safety Network
80. ^ Accident description for 60-0352 at the Aviation Safety Network
81. ^ Accident description for 56-3597 at the Aviation Safety Network
82. ^ Accident description for 57-1498 at the Aviation Safety Network
83. ^ Accident description for 61-0322 at the Aviation Safety Network
84. ^ Accident description for 61-0319 at the Aviation Safety Network
85. ^ Accident description for 60-0340 at the Aviation Safety Network
86. ^ Accident description for 61-0265 at the Aviation Safety Network
87. ^ Grawe, Jim. "Wichita Airplane Crash 1965". Kansapedia. Kansapedia. Archived from the original on 6 December 2016. Retrieved 6 January 2017.
88. ^ Accident description for 57-1442 at the Aviation Safety Network
89. ^ "1965 KC-135 tanker crash on Piatt St". Wichita Eagle. Wichita, Kansas. 15 January 2011. Archived from the original on 14 December 2013. Retrieved 21 October 2014.
90. ^ Accident description for 63-8882 at the Aviation Safety Network
91. ^ Accident description for 63-0842 at the Aviation Safety Network
92. ^ Accident description for 61-0273 at the Aviation Safety Network
93. ^ "Spain, U.S. Agree to Radioactivity Cleanup 40 Years After Atomic Accident". Fox News. 8 October 2006. Archived from the original on 11 January 2014. Retrieved 21 October 2014.
94. ^ Accident description for 57-1444 at the Aviation Safety Network
95. ^ Accident description for 56-3613 at the Aviation Safety Network
96. ^ Accident description for 58-0026 at the Aviation Safety Network
97. ^ Accident description for 56-3655 at the Aviation Safety Network
98. ^ Accident description for 55-3133A at the Aviation Safety Network
99. ^ Shalhoup, Dean (28 May 2011). "Fateful flight for Nashua airman". Nashua Telegraph. Nashua, New Hampshire. Archived from the original on 3 March 2016. Retrieved 20 October 2014.
100. ^ Accident description for 55-3138 at the Aviation Safety Network
101. ^ Accident description for 61-0301 at the Aviation Safety Network
102. ^ Accident description for 58-0031 at the Aviation Safety Network
103. ^ Accident description for 58-0039 at the Aviation Safety Network
104. ^ Accident description for 58-0048 at the Aviation Safety Network
105. ^ Accident description for 63-7989 at the Aviation Safety Network
106. ^ Accident description for 60-0354 at the Aviation Safety Network
107. ^ Hoctor, Christopher J.B. (January 2014). Voices from an Old Warrior: Why KC-135 Safety Matters (PDF). Columbia, Missouri: Mizzou Publishing. p. 63\. ISBN 9781616004606. Archived (PDF) from the original on 4 March 2016. Retrieved 21 October 2014.
108. ^ a b "46th Air Refueling Squadron History". 46thars.tripod.com. Archived from the original on 2 December 2013. Retrieved 26 April 2018.
109. ^ Accident description for 60-0368 at the Aviation Safety Network
110. ^ a b c Accident description for 61-0296 at the Aviation Safety Network
111. ^ Accident description for 57-1489 at the Aviation Safety Network
112. ^ Accident description for 58-0031 at the Aviation Safety Network
113. ^ Ranter, Harro. "ASN Aircraft accident Boeing KC-135A Stratotanker 61-0316 Cairo International Airport (CAI)". www.aviation-safety.net. Retrieved 19 March 2018.
114. ^ Aviation Safety Network, Accident description, Flight Safety Foundation
115. ^ Accident description for 63-7983 at the Aviation Safety Network
116. ^ "Four Killed in U.S. Air Force Tanker Crash". Associated Press. 17 June 1986. Archived from the original on 28 October 2014. Retrieved 20 October 2014.
117. ^ Accident description for 60-0361 at the Aviation Safety Network
118. ^ "4" (PDF). GAO/NSIAD-88-172 Report to the Honorable Edward F. Feighan, House of Representatives; Strategic Air Command: KC-135A Crash and the Need for SAC Air Show Regulations (Report). General Accounting Office. July 1988. Archived (PDF) from the original on 24 September 2015. Retrieved 20 October 2014.
119. ^ Accident description for 60-0317 at the Aviation Safety Network
120. ^ "Air Force Policies Cited in Jet Crash". The Argus-Press. Owosso, Michigan. Associated Press. 7 March 1989. p. 5\. Archived from the original on 23 March 2017. Retrieved 24 September 2017.
121. ^ "BIZARRE ACCIDENT. An Air Force reservist died... – Orlando Sentinel".
122. ^ Accident description for 63-7990 at the Aviation Safety Network
123. ^ Accident description for 57-1481 at the Aviation Safety Network
124. ^ Accident description for 56-3592 at the Aviation Safety Network
125. ^ "Fredericton - Faculty of Arts - Centres - The Gregg Centre - New Brunswick Military Heritage Project - UNB". www.unb.ca. Archived from the original on 24 January 2017. Retrieved 26 April 2018.
126. ^ "Tanker Plane Explodes on Runway". The Palm Beach Post. AP. 12 January 1990. Archived from the original on 3 April 2019. Retrieved 30 June 2017 - via newspapers.com.
127. ^ "Hull-loss description". aviation-safety.net. Archived from the original on 3 July 2018. Retrieved 30 June 2017.
128. ^ "KC-135E Fire at Pease AFB January 1990". nhshotgunner. 9 February 2015. Archived from the original on 30 October 2021. Retrieved 30 June 2017 - via YouTube.
129. ^ "Only pilot who landed a KC-135 after two engines ripped off in combat writes his story". speakingeagles.com. Archived from the original on 19 June 2019. Retrieved 19 June 2019.
130. ^ "25th Anniversary of Desert Storm: Grissom Airmen share their story". Grissom Air Reserve Base. Archived from the original on 25 February 2021. Retrieved 17 May 2021.
131. ^ Accident description for 57-1470 at the Aviation Safety Network
132. ^ Brandon, Karen (11 December 1993). "Guard Plane Explodes, 6 Killed". Chicago Tribune. Archived from the original on 10 December 2018. Retrieved 10 December 2018.
133. ^ Accident description for 59-1452 at the Aviation Safety Network
134. ^ Ranter, Harro. "ASN Aircraft accident Boeing KC-135R Stratotanker 57-1418 Oklahoma City-Tinker AFB, OK (TIK)". aviation-safety.net. Archived from the original on 15 June 2017. Retrieved 26 April 2018.
135. ^ Accident description for 63-8886 at the Aviation Safety Network
136. ^ Accident description for 63-8877 at the Aviation Safety Network
137. ^ Humphrey, Jeff (20 June 2013). "Cellphone video may have captured deadly KC-135 crash". Spokane, Washington. Archived from the original on 19 October 2014. Retrieved 22 April 2020.`{{cite news}}`: CS1 maint: unfit URL (link)
138. ^ "Investigation board determines cause of KC-135 crash in May". 14 March 2014. Archived from the original on 2 November 2014. Retrieved 21 October 2014.
139. ^ Davis, Kristin (13 March 2014). "Malfunction, pilot error caused May KC-135 crash". Air Force Times. Springfield, Virginia. Retrieved 21 October 2014.
140. ^ Camden, Jim (13 March 2014). "Tanker's tail separated in flight before Kyrgyzstan crash". Spokesman-Review. Spokane, Washington. Archived from the original on 22 October 2014. Retrieved 21 October 2014.
141. ^ United States Air Force Aircraft Accident Investigation Board Report; KC-135R, T/N 63-8877; 22d Air Refueling Wing McConnell Air Force Base, Kansas; Location: 6 Miles South of Chaldovar, Kyrgyz Republic (PDF) (Report). 31 December 2013. Archived (PDF) from the original on 21 October 2014. Retrieved 21 October 2014.
142. ^ Bernal Del Agua, David (25 June 2014). "Anything but a tanker: the first KC-135-story". McConnell Air Force Base. Archived from the original on 13 May 2016. Retrieved 14 November 2016.
143. ^ "KC-135A Stratotanker". March Field Air Museum. March Field Air Museum. Archived from the original on 15 November 2016. Retrieved 14 November 2016.
144. ^ "Aircraft on Display". Castle Air Museum. Archived from the original on 14 November 2016. Retrieved 14 November 2016.
145. ^ "Airframe Dossier - Boeing KC-135A-BN Stratotanker, s/n 55-3139 USAF, c/n 17255". Aerial Visuals. AerialVisuals.ca. Archived from the original on 14 November 2016. Retrieved 14 November 2016.
146. ^ "20. KC-135". Barksdale Global Power Museum. Archived from the original on 14 November 2016. Retrieved 14 November 2016.
147. ^ "Airframe Dossier - Boeing KC-135A-BN Stratotanker, s/n 56-3595 USAF, c/n 17344". Aerial Visuals. AerialVisuals.ca. Archived from the original on 9 April 2017. Retrieved 14 November 2016.
148. ^ "Airpark". Scott Air Force Base. Archived from the original on 14 November 2016. Retrieved 14 November 2016.
149. ^ "KC-135 Stratotanker". Scott Field Heritage Air Park. Scott Field Heritage Air Park. Archived from the original on 20 August 2016. Retrieved 14 November 2016.
150. ^ "Airframe Dossier - Boeing KC-135E Stratotanker, s/n 56-3611 USAF, c/n 17360". Aerial Visuals. AerialVisuals.ca. Archived from the original on 14 November 2016. Retrieved 14 November 2016.
151. ^ "Airframe Dossier - Boeing KC-135A-BN Stratotanker, s/n 56-3639 USAF, c/n 17388". Aerial Visuals. AerialVisuals.ca. Archived from the original on 9 April 2017. Retrieved 14 November 2016.
152. ^ "KC-135E". Kansas Aviation Museum. 9 June 2014. Archived from the original on 19 October 2016. Retrieved 14 November 2016.
153. ^ "Airframe Dossier - Boeing KC-135E Stratotanker, s/n 56-3658 USAF, c/n 17407". Aerial Visuals. AerialVisuals.ca. Archived from the original on 14 November 2016. Retrieved 14 November 2016.
154. ^ "Static Displays". Museum of the Kansas National Guard. Archived from the original on 13 May 2016. Retrieved 14 November 2016.
155. ^ "Airframe Dossier - Boeing KC-135E Stratotanker, s/n 57-1429 USAF, c/n 17500". Aerial Visuals. AerialVisuals.ca. Archived from the original on 14 November 2016. Retrieved 14 November 2016.
156. ^ Thibault, Janine (30 March 2010). "KC-135 finds home at Heritage Park". Eielson Air Force Base. Archived from the original on 14 November 2016. Retrieved 14 November 2016.
157. ^ "Record Listing". Living History Registry. Living History Registry. Archived from the original on 14 November 2016. Retrieved 14 November 2016.
158. ^ Baugher, Joe (28 July 2016). "1957 USAF Serial Numbers". JoeBaugher.com. Archived from the original on 20 July 2011. Retrieved 14 November 2016.
159. ^ Smith, Robert (5 June 2015). "Nebraska Scavenger Hunt". Rambles in the Air. WordPress.com. Archived from the original on 15 November 2016. Retrieved 14 November 2016.
160. ^ "KC-135E Stratotanker". Air Mobility Command Museum. AMC Museum Foundation, Inc. Archived from the original on 1 September 2016. Retrieved 14 November 2016.
161. ^ "Boeing KC-135E "Stratotanker"". Hill Air Force Base. 11 August 2009. Archived from the original on 13 May 2016. Retrieved 14 November 2016.
162. ^ "Airframe Dossier - Boeing KC-135A-BN Stratotanker, s/n 930 NASA, c/n 17969, c/r N930NA". Aerial Visuals. AerialVisuals.ca. Archived from the original on 14 November 2016. Retrieved 14 November 2016.
163. ^ "Boeing KC-135A-BN Stratotanker 59-1487". 126th Air Refueling Wing. Archived from the original on 15 April 2016. Retrieved 14 February 2022 - via Wikimedia Commons.
164. ^ Boyd, Don (29 September 2011). "USAF Boeing KC-135A-BN Stratotanker #59-1487 at Scott AFB aviation stock photo #0656". PBase. Archived from the original on 14 November 2016. Retrieved 14 November 2016.
165. ^ "Airframe Dossier - Boeing KC-135E Stratotanker, s/n 59-1497 USAF". Aerial Visuals. AerialVisuals.ca. Archived from the original on 14 November 2016. Retrieved 14 November 2016.
166. ^ "United States Air Force Boeing KC-135A (59-1497)". netAirspace.com. netAirspace.com. Archived from the original on 19 February 2017. Retrieved 14 November 2016.`{{cite web}}`: CS1 maint: unfit URL (link)
167. ^ "National Museum of the United States Air Force™ > Upcoming > KC-135". National Museum of the USAF. 1 October 2015. Retrieved 4 May 2022.
168. ^ "Boeing KC-135A Stratotanker". Pima Air & Space Museum. Pimaair.org. Archived from the original on 20 December 2016. Retrieved 14 February 2022.
169. ^ "KC-135 STRATOTANKER : Historical Snapshot". Boeing. Archived from the original on 27 December 2015.
170. ^ Lednicer, David. "The Incomplete Guide to Airfoil Usage". m-selig.ae.illinois.edu. Retrieved 16 April 2019.

## Bibliography[edit | edit source]

* Hopkins, III, Robert S. (1997). Boeing KC-135 Stratotanker: More Than Just a Tanker. Leicester, England: Midland Publishing. ISBN 1-85780-069-9.
* Pither, Tony (1998). The Boeing 707 720 and C-135. Tunbridge Wells, England: Air-Britain (Historians) Ltd. ISBN 0-85130-236-X.

## External links[edit | edit source]

Wikimedia Commons has media related to:
KC-135 Stratotanker (category)

* USAF KC-135 fact sheet and photo gallery at official USAF website
* KC-135 history page and KC-135 image gallery on Boeing.com
* KC-135 page on awacs-spotter.nl
* Photo gallery of NASA's KC-135A tanker
* KC-135 page at globalsecurity.org
* KC-135 page at fas.org \- (not updated since late 1999, but still perhaps useful)
* C-135 page at aero-web.org \- Includes specs for many variants
* Smart Tankers (Defence Today)
* The short film 15 AF Heritage - High Strategy - Bomber and Tankers Team (1980) is available for free download at the Internet Archive.
* National Museum of the Air Force video tour of KC-135

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* 815
* 818
* 820
* 853
* 953

* 707
* 717 (i)
* 717 (ii)
* 720
* 727
* 733
* 737
* 739
* 747
* 757
* 767
* 777
* 787
* 2707

Turbine engines|

* 8C
* 500
* 502
* 520
* 550

Vessels|

* 929

Other|

* Boeing Customer Codes

* v
* t
* e

Boeing 367-80, C-135, and 707/C-137 family variants

Civil/Commercial|

* 367-80
* 707
* 720

Military:
C-135 (717/739)|

* C-135
* EC-135
* KC-135
* NC-135
* OC-135
* RC-135
* WC-135

Military:
707/C-137|

* C-137
* EC-18
* CC-137
* KC-137
* VC-137
* SAM 26000
* SAM 27000
* E-3
* CT-49
* E-6
* E-8

* v
* t
* e

United States military transport aircraft designations, Army/Air Force and Tri-Service systems

Army/Air Force sequence
(1925-1962)|

* C-1
* C-2
* C-3
* C-4
* C-5
* C-6
* C-7
* C-8
* C-9
* C-10
* C-11
* C-12
* C-131
* C-14
* C-15
* C-16
* C-17
* C-18
* C-19
* C-20
* C-21
* C-22
* C-23
* C-24
* C-25
* C-26
* C-27
* C-28
* C-29
* C-30
* C-31
* C-32
* C-33
* C-34
* C-35
* C-36
* C-37
* C-38
* C-39
* C-40
* C-41
* A
* C-42
* C-43
* C-44
* C-45
* C-46
* C-47
* F
* T
* AC-47
* C-48
* C-49
* C-50
* C-51
* C-52
* C-53
* C-54
* C-55
* C-56
* C-57
* C-58
* C-59
* C-60
* C-61
* C-62
* C-63
* C-64
* C-65
* C-66
* C-67
* C-68
* C-69
* C-70
* B
* C-71
* C-72
* C-73
* C-74
* C-75
* C-76
* C-77
* B-D
* C-78
* C-79
* C-80
* C-81
* C-82
* C-83
* A
* B
* C-84
* C-85
* C-86
* C-87
* C-88
* C-89
* C-90
* C-91
* C-92
* C-93
* C-94
* C-95
* C-96
* C-97
* KC-97
* C-98
* C-99
* C-100
* C-101
* C-102
* C-103
* C-104
* C-105
* C-106
* C-107
* C-108
* C-109
* C-110
* C-111
* C-112
* C-113
* C-114
* C-115
* C-116
* C-117
* D
* C-118
* C-119
* AC-119
* C-120
* C-121
* F
* C-122
* C-123
* A
* C-124
* C-125
* C-126
* C-1272
* C-127 (I)
* C-127 (II)
* C-128
* C-129
* C-130
* J
* AC-130
* DC-130
* EC-130/H
* HC-130
* KC-130
* LC-130
* MC-130
* WC-130
* C-131
* C-132
* C-133
* C-134
* C-135
* KC-135
* C-136
* C-1372
* YC-137 (I)
* YC-137 (II)
* C-137
* C-1381
* C-1391
* C-140
* C-141
* C-142

Tri-service sequence
(1962-present)|

* C-1
* C-2
* C-3
* C-4
* C-5
* C-6
* C-72
* C-7/B
* RC-7
* C-8
* C-9
* C-102
* C-10
* KC-10
* C-11
* C-12
* RC-12
* C-131
* C-14
* C-15
* C-161
* C-17
* C-18
* C-19
* C-20A-D
* F-H
* C-21
* C-22
* C-23
* C-24
* C-25
* C-26
* C-27
* J
* C-28
* C-29
* C-301
* C-31
* C-32
* C-33
* C-341
* C-35
* C-363
* C-37A
* B
* C-38
* C-391
* C-40
* C-41
* C-421
* C-431
* C-441
* C-45
* C-46

Revived original sequence
(2005-present)|

* C-143
* C-144
* C-145
* C-146
* C-147

Non-sequential designations|

* C-767
* C-880

Related designations|

* CT-39
* CT-43
* CV-2
* CV-7

1 Not assigned  • 2 Assigned to multiple types  • 3 Unconfirmed

* v
* t
* e

United States Air Force system numbers

100–199|

* 100
* 101
* P
* 102
* 103
* 104
* 105
* 1061
* 107
* A-1
* A-2
* 1081
* 1091
* 110
* 1111
* 112
* 1131
* 1141
* 1151
* 1161
* 117
* L
* M
* 118
* A
* L
* P
* 119
* C/F
* E
* L
* T
* Y
* 120
* 121
* 122
* 123
* 124
* 125
* 126
* 1271
* 128
* 129
* 130
* 131
* 132
* A
* B
* 133
* 1341
* 135
* 1361
* 1371
* 138
* 139
* 140
* 1411
* 142
* 143–1971
* 198
* 199
* B
* C
* D
* Y

200–299|

* 200
* 201
* A/L
* B/W
* E
* 202
* 2031
* 204
* 205
* 206
* 2071
* 208
* 2091
* 210
* 2111
* 212
* 213
* 214
* 2151
* 216
* 217
* 218
* 2191
* 220
* 221
* 222
* A
* G
* 2231
* 224
* 2251
* 226
* 227–2381
* 239
* 240–2781
* 279
* 280–2981
* 299

300–399|

* 300
* 3011
* 302
* 303
* 3041
* 3051
* 306
* A/L
* B
* 307
* 308
* 309
* 3101
* 3111
* 3121
* 3131
* 314
* 315
* A-1
* A-2
* 316
* 317
* 3181
* 319
* 3201
* 321
* 3221
* 323
* 324
* L
* M/N
* 325
* 326
* 327
* E
* 328
* E
* 329
* F
* 3301
* 3311
* 3321
* 3331
* 3341
* 335
* 336
* 337
* 338–3791
* 380
* A/B/E/F/N
* P
* 381–3971
* 398
* 399
* A
* B

400–499|

* 400
* B/C/N
* E
* G/H
* M
* 401
* 402
* 4031
* 404
* 405
* B
* C
* D
* 4061
* 407
* 4081
* 4091
* 410
* E
* L
* 411
* E
* L
* 412
* 413
* 414
* L
* M
* 415
* 416
* L
* M (I)
* M (II)
* P
* Q
* 417
* 418
* L
* M
* 4191
* 420
* L/W
* 4211
* 422
* 423
* 424
* 425
* 426
* L
* M
* 427
* L
* M
* 428
* A
* L
* 429
* 430
* 431
* G (I)
* G (II)
* 432
* 433
* 434
* 435
* A
* L
* 436
* 437
* 438
* 439
* 440
* 441
* A
* D
* L
* 442
* 443
* 4441
* 445
* L
* M
* 446
* 447
* 4481
* 4491
* 450
* 451
* D
* L
* 452
* 453
* 4541
* 455
* 456
* 4571
* 458
* 459
* 460
* L
* 461
* 462
* 463
* 464
* 465
* 466
* 467
* 468
* 469
* 470
* 471
* L (I)
* L (II)
* 472
* 473
* 474
* L
* N
* 4751
* 476
* E
* 477
* 478
* A
* T
* 4791
* 480
* 481
* L
* 482
* E
* L
* M/Z
* 483
* 484
* L
* M
* N
* 485
* L
* Z
* 486
* 487
* 488
* 489
* 490
* L
* M
* 4911
* 492
* 493
* 494
* 495
* L (I)
* L (II)
* 496
* 497
* A
* L (I)
* L
* 498
* A
* C
* D
* E
* L
* 499
* A
* C
* D

500–599|

* 500
* 501–5191
* 520
* 521–5291
* 530
* 531–5411
* 542
* 543–5491
* 550
* A
* E
* 551–5591
* 560
* A
* F
* 561–5691
* 570
* 571–5791
* 580
* A
* E
* 581–5891
* 590
* 591
* 592
* 593–5991

600–699|

* 600
* 601
* A
* L
* 602
* A
* L
* 603
* A
* L
* 604
* 605
* 606
* 607
* 6081
* 609
* 6101
* 6111
* 6121
* 6131
* 614
* 6151
* 616
* 6171
* 618
* 6191
* 620
* 621
* A/B (I)
* B (II)
* 622
* 623
* 624
* 625
* 6261
* 627
* 6281
* 6291
* 6301
* 6311
* 632
* 633
* 634
* A
* B
* 635
* 6361
* 6371
* 638
* 639
* 640
* 641
* 642
* 643
* 6441
* 6451
* 6461
* 6471
* 648
* A
* D
* P
* 649
* A
* B
* C
* D
* E
* F
* L
* P
* 650
* 651
* 652
* 6531
* 6541
* 655
* A (I)
* A (II)
* P
* 656
* 6571
* 6581
* 6591
* 660
* 661
* 6621
* 6631
* 664
* 665
* A (I)
* A (II)
* 666
* A
* C/P
* 667
* 668
* 6691
* 670
* 6711
* 672
* A
* M/P
* 6731
* 674
* 675
* 6761
* 6771
* 6781
* 679
* 680
* 681
* D
* E
* 6821
* 683
* A
* J
* V
* 6841
* 685
* 686
* 687
* J
* P
* 6881
* 6891
* 690
* 691
* C
* X
* Z
* 6921
* 693
* 6941
* 695
* A
* B
* C
* L
* N
* P
* Q
* R
* S (I)
* S (II)
* 6961
* 6971
* 6981
* 6991

700–799|

* 700–7351
* 736
* 7371
* 7381
* 7391
* 7401
* 741
* 742
* 743
* 7441
* 745
* 746–7531
* 754
* 755–7991

800–899|

* 8001
* 8011
* 802
* L (I)
* L (II)
* 8031
* 8041
* 8051
* 806
* 807
* 808–8161
* 817
* 8181
* 8191
* 8201
* 8211
* 8221
* 823
* 824–8311
* 832
* 8331
* 834
* 835–8451
* 846
* 847–8991

900–999|

* 900–9511
* 952
* 8531
* 8541
* 8551
* 956
* 957–9671
* 968

1 Unknown or not assigned
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