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The Delta IV Heavy (Delta 9250H) was an expendable heavy-lift launch vehicle, the largest type of the Delta IV family. It had the highest capacity of any operational launch vehicle in the world after the retirement of the Space Shuttle in 2011 until the Falcon Heavy debuted in 2018, and it was the world's third highest-capacity launch vehicle in operation at the time of its retirement in 2024.
Delta IV Heavy launching. The Delta IV Heavy (Delta 9250H) combines a 5 m (16 ft) diameter DCSS and payload fairing with two additional CBCs. These are strap-on boosters which are separated earlier in the flight than the center CBC. As of 2007, a longer 5 meter diameter composite fairing was standard on the Delta IV Heavy, [26] with an aluminum ...
An RS-68 was part of each Delta IV Common Booster Core. The largest of the launch vehicles, the Delta IV Heavy, used three CBCs mounted together. [8] The engine produced 758,000 pounds-force (3,370 kN) in a vacuum and 663,000 pounds-force (2,950 kN) at sea level. The engine's mass was 14,560 pounds (6,600 kg).
The 5 meter diameter composite fairing was standard on the Delta IV Heavy, [67] with an aluminum isogrid fairing also available. The aluminum trisector (three-part) fairing was built by Boeing and derived from a Titan IV fairing. [68] The trisector fairing was first used on the DSP-23 flight. [69] Delta IV Heavy had 16 launches in its lifetime ...
The launch was conducted by ULA and was the first flight of a Delta IV Heavy from Vandenberg. [35] On 24 September 2022, ULA launched the last Delta IV Heavy from the pad, concluding their use of SLC-6. [36] Vulcan Centaur, Delta IV Heavy's successor, will launch from SLC-3E at Vandenberg, currently used by Atlas V. [37]
The Delta IV Heavy (Delta 9250H) was an expendable heavy-lift launch vehicle, the largest type of the Delta IV family. It had the highest capacity of any operational launch vehicle in the world after the retirement of the Space Shuttle in 2011 until the Falcon Heavy debuted in 2018, and it was the world's third highest-capacity launch vehicle ...
Its first stage is powered by four main engines, each generating up to 29,000 kilograms (64,000 pounds) of thrust, plus a fifth which will be used for attitude control, which provides an additional 13,600 kilograms (30,000 pounds). At liftoff, these engines will generate a total of 130,000 kilograms (290,000 pounds) of thrust.
The Delta IV Heavy rocket has three Delta IV core stages together. According to the ULA website, each rocket engine produces up to 702,000 pounds of thrust. With this performance, one can see why ...