List of Delta 4-M launches

Short description: none

The Delta IV Medium (also referred to as 'single stick'[1][2]) was available in four configurations: Medium, Medium+ (4,2), Medium+ (5,2), and Medium+ (5,4).[3]

The Delta 4 Medium family often flew with Global Positioning System (GPS) satellites. It flew 6 second generation Global Positioning System (GPS) satellites to orbit. After the second generation Global Positioning System (GPS) had all been launched, it launch a third generation Global Positioning System (GPS) only it final flight. The Medium (4,2) version last flew on 22 August 2019, marking the retirement of the Delta IV Medium variants.[3][4]

## Contents

* 1 Launch Statistics
* 1.1 Launch Outcomes
* 1.2 Launch sites
* 1.3 Orbits
* 1.4 Customers
* 2 Launch History
* 3 See also
* 4 References

## Launch Statistics

Delta 4-M

Delta 4 Medium launch carrying DSCS III-B6.

Function| Orbital launch vehicle
Manufacturer| United Launch Alliance
Country of origin| United States
Cost per launch| US$164+ million[5]
Size
Height| 63–72 m (207–236 ft)
Diameter| 5 m (16 ft)
Mass| 550,000 lb (250,000 kg)
Stages| 2
Capacity
Payload to LEO| 25,287 lb (11,470 kg)
Payload to GTO| 9,799 lb (4,445 kg)
Associated rockets
Family| Delta Delta 4 Medium
Comparable|

* Atlas 5
* Falcon 9
* H-2A
* Long March 3B
* Proton-M

Launch history
Status| Retired
Launch sites| SLC-37B, Cape Canaveral Air Force Station
SLC-6, Vandenberg Air Force Base
Total launches| 3
Successes| 3
First flight| 20 November 2002 (Eutelsat W5)
Last flight| November 4, 2006 (DMSP 17)
Notable payloads|

* DSCS
* DMSP

First stage – CBC
Gross mass| 226,400 kg (499,100 lb)
Engines| 1 RS-68A
Thrust| 3,140 kN (705,000 lbf) (sea level)
Specific impulse| Sea level: 360 s (3.5 km/s)
Vacuum: 412 s (4.04 km/s)
Burn time| 245 seconds (328 seconds in Heavy configuration)
Fuel| LH2 / LOX
Second stage – Delta Cryogenic Second Stage (DCSS)
Gross mass| 4-m: 24,170 kg (53,290 lb)
5-m: 30,700 kg (67,700 lb)
Engines| 1 RL10-B-2
Thrust| 110 kN (25,000 lbf)
Specific impulse| 462 s (4.53 km/s)
Burn time| 850-1,125 seconds
Fuel| LH2 / LOX

### Launch Outcomes

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### Launch sites

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### Orbits

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### Customers

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## Launch History

Flight  | Date / time (UTC)  | Rocket Configuration  | Launch site  | Payload  | Payload mass  | Orbit  | Customer  | Launch

outcome

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1  | March 11, 2003

00:59

| Delta 4-M  | CCAFS SLC-37B  | USA-167 (DSCS-3 A3)  | Classified  | GTO | US Air Force | Success[6]
Military communications satellite, First Delta 4 Medium launch, First USAF EELV mission
2  | August 29, 2003

23:13

| Delta 4-M  | CCAFS SLC-37B  | USA-170 (DSCS-3 B6)  | Classified  | GTO | US Air Force | Success[6]
Military communications satellite
3  | November 4, 2006

13:53

| Delta 4-M  | VAFB SLC-6  | DMSP F17  | Classified  | SSO | DoD  | Success[7]
First Delta 4 launch into a LEO/SSO, Military weather satellite. Final Delta 4-M launch.

## See also

* Delta 4 Heavy
* Delta 4 Medium
* Delta 4
* Delta rocket family
* List of Thor and Delta launches
* List of 2000-2009 Thor and Delta launches

## References

1. ↑ Clark, Stephen. "Final 'single stick' Delta 4-Medium rocket arrives at Florida launch pad – Spaceflight Now" (in en-US). https://spaceflightnow.com/2019/06/07/final-single-stick-delta-4-medium-rocket-arrives-at-florida-launch-pad/.
2. ↑ Ray, Justin. "Air Force assigns new Delta 4 rocket launch – Spaceflight Now" (in en-US). https://spaceflightnow.com/2015/09/10/air-force-assigns-new-delta-4-rocket-launch/.
3. ↑ 3.0 3.1 Gebhardt, Chris (2019-08-22). "Delta IV Medium's well-earned retirement with GPS finale". NASASpaceFlight.com. https://www.nasaspaceflight.com/2019/08/delta-iv-medium-retirement-gps-finale/.
4. ↑ Berger, Eric (2019-08-22). "The last single-stick Delta rocket launched Thursday, and it put on a show". Ars Technica. https://arstechnica.com/science/2019/08/the-last-single-stick-delta-rocket-launched-thursday-and-it-put-on-a-show/.
5. ↑ Office, U. S. Government Accountability. "Surplus Missile Motors: Sale Price Drives Potential Effects on DOD and Commercial Launch Providers". https://www.gao.gov/products/gao-17-609.
6. ↑ 6.0 6.1 "Delta 4 rocket successfully begins military service". Spaceflight Now. March 10, 2003. http://www.spaceflightnow.com/delta/d296/.
7. ↑ "Military weather satellite rockets into polar orbit". Spaceflight Now. November 4, 2006. http://www.spaceflightnow.com/delta/d320/.

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