The upper stage of the Delta IV was the Delta Cryogenic Second Stage (DCSS). The DCSS was based on the Delta III upper stage but has increased propellant capacity. Two versions have been produced: a 4 m (13 ft) diameter DCSS that was retired with the Delta IV Medium and a 5 m (16 ft) diameter DCSS that remains in service with the Delta IV Heavy.

The Delta Cryogenic Second Stage (DCSS) is a family of cryogenic-fuelled rocket stages used on the Delta III, Delta IV, and on the Space Launch System Block 1 launch vehicles. The DCSS employs a unique two-tank architecture where the cylindrical liquid hydrogen (LH 2) …

Upper Stage. The Delta IV relied on the RL10 propulsion system to power the second stages. Logging an impressive record of nearly 400 successful flights and nearly 700 firings in space, RL10 engines, manufactured by Aerojet Rocketdyne, harnessed the power of …

Aug 6, 2016 · Proposed upgrade to Delta IV Heavy by adding 6 GEM-60 solid rocket boosters, RS-68B upgraded engines to the core vehicles, and an AUS-60 upper stage powered by 1 MB-60 or RL-60 27 metric ton thrust LOx/LH2 engine. 6.5 m diameter payload fairing.

Sep 23, 2023 · Built by Boeing and United Launch Alliance, the ICPS is a modified Delta Cryogenic Second Stage, a proven upper stage used on United Launch Alliance’s Delta IV family of launch vehicles.

Built by Boeing and United Launch Alliance, the ICPS is a modified Delta Cryogenic Second Stage, a proven upper stage used on United Launch Alliance’s Delta IV family of launch vehicles.

The Delta IV Heavy can lift 28,370 kg (62,550 lb) to low Earth orbit and 13,810 kg (30,450 lb) to geostationary transfer orbit (GTO). [13] It was an all liquid-fueled launch vehicle, consisting of an upper stage, one main booster and two strap-on boosters. [13] The first launch of the Delta IV Heavy on 21 December 2004 carried a boilerplate ...

Delta IV Second Stage consists of a Delta Cryogenic Second Stage (DCSS) which is based on the Delta III upper stage, but with increased propellant capacity. The 4 m (13.1 ft) version uses lengthened propellant tanks, while the 5 m version has a 5 m diameter liquid hydrogen tank and a further lengthened liquid oxygen tank.

Delta began as Thor, a crash December 1955 program to produce an intermediate range ballistic missile using existing components, which flew thirteen months after go-ahead. Fifteen months after that, a space launch version flew, using an existing upper stage.

Delta IV Second Stage. The Delta IV second stage is available in two sizes. The smaller version is known as the 4 meter model (illustration at left), while the larger is 5 meters (right). Both versions use a single RL10B-2 engine.