List of Delta IV Heavy launches

Delta IV Heavy

Delta IV Heavy launches from Vandenberg
Function	Orbital heavy-lift launch vehicle
Manufacturer	United Launch Alliance
Country of origin	United States
Cost per launch	US$350 million [1] NRO: US$440 million
Cost per year	2018
Size
Height	72 m (236 ft)
Diameter	5 m (16 ft)
Width	270
Mass	733,000 kg (1,616,000 lb)
Stages	2+
Capacity
Payload to LEO	28,790 kg (63,470 lb)
Payload to GTO	14,220 kg (31,350 lb)
Associated rockets
Family	Delta IV
Comparable	Long March 5 Ariane 5 Falcon Heavy Titan IV Proton-M
Launch history
Status	Active
Launch sites	Cape Canaveral Air Force Station , SLC-37B Vandenberg Air Force Base , SLC-6
Total launches	15
Successes	14
Partial failures	1
First flight	21 December 2004 (USA-181)
Last flight	22 June 2023 (NROL-68)
Notable payloads	EFT-1 NRO classified payloads Kennen Orion Parker Solar Probe
Boosters (CBC)
No. boosters	2
Length	40.8 m (134 ft)
Diameter	5.1 m (17 ft)
Empty mass	26,000 kg (57,000 lb)
Gross mass	226,400 kg (499,100 lb)
Propellant mass	200,400 kg (441,800 lb) [2]
Engines	1 RS-68A
Thrust	3,140 kN (710,000 lbf)
Total thrust	6,280 kN (1,410,000 lbf)
Specific impulse	Sea level: 360 s (3.5 km/s) Vacuum: 412 s (4.04 km/s)
Burn time	242 seconds [3]
Fuel	LH2 / LOX
First stage (CBC)
Length	40.8 m (134 ft)
Diameter	5.1 m (17 ft)
Gross mass	226,400 kg (499,100 lb)
Propellant mass	200,400 kg (441,800 lb)
Engines	1 RS-68A
Thrust	3,140 kN (710,000 lbf)
Specific impulse	Sea level: 360 s (3.5 km/s) Vacuum: 412 s (4.04 km/s)
Burn time	328 seconds
Fuel	LH2 / LOX
Second stage (DCSS)
Length	13.7 m (45 ft)
Diameter	5.1 m (17 ft)
Gross mass	30,700 kg (67,700 lb)
Propellant mass	27,220 kg (60,010 lb)
Engines	1 RL10-B-2
Thrust	110 kN (25,000 lbf)
Specific impulse	462 s (4.53 km/s)
Burn time	1125 seconds
Fuel	LH2 / LOX

The following is a list of Delta IV Heavy launches since 2004.

The Delta IV Heavy (Delta 9250H) is an expendable heavy-lift launch vehicle, the largest type of the Delta IV family and the world's second highest-capacity rocket in operation, behind SpaceX's Falcon Heavy rocket and closely followed by CNSA's Long March 5 rocket.^[4][5] It is manufactured by United Launch Alliance and was first launched in 2004.^[6]

Delta IV Heavy for Exploration Flight Test-1

About the Delta IV Heavy

The Delta IV Heavy consists of a central Common Booster Core (CBC), with two additional CBCs as liquid rocket boosters instead of the GEM-60 solid rocket motors used by the Delta IV Medium+ versions. At lift off, all three cores operate at full thrust, and 44 seconds later the center core throttles down to 55% to conserve fuel until booster separation. The boosters burn out at 242 seconds after launch and are separated as the core booster throttles back up to full thrust. The core burns out 86 seconds later, and the second stage completes the ascent to orbit.^[3]

The rocket uses three RS-68 engines, one in the central core and one in each booster.^[7]

On 24 September 2022, the last Delta IV flight from Vandenberg launched the NROL-91 mission from SLC-6.^[8]

Launch statistics

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Launch history

Future launches

Missions thirteen through sixteen were announced by the National Reconnaissance Office.^[14] For the final five missions (12-16) including modifications, ULA was awarded US$2.2 billion, or US$440 million per launch.^[15] This can be compared with the Falcon Heavy launch price of $90M to $150M. (As of June 2023), only one remains before ULA retires the Delta IV Heavy.^[13]

Notes

References

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