Interim Cryogenic Upper Stage
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 (LH2) tank carries payload launch loads and forms the upper section. An oblate spheroid tank filled with liquid oxygen (LOX) and the engine are suspended from the LH2 tank and covered by the interstage during initial launch. The DCSS is powered by a single RL10B-2 engine built by Aerojet Rocketdyne, which features an extendable carbon–carbon nozzle to improve specific impulse. The DCSS was designed by the National Space Development Agency of Japan, based on the second stage it developed for the H-IIA rocket. The initial versions for the Delta III were built by Mitsubishi Heavy Industries in Japan. For the Delta IV, production was transferred to Boeing Integrated Defense Systems and later to United Launch Alliance. ...
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Boeing Integrated Defense Systems
Boeing Defense, Space & Security (BDS) is a division of the Boeing Company based in Arlington, Virginia, near Washington, D.C. The division builds military airplanes, rotorcraft, and missiles, as well as space systems for both commercial and military customers, including satellites, spacecraft, and rockets. It was formerly known as Boeing Integrated Defense Systems (IDS), which was formed in 2002 by combining the former "Military Aircraft and Missile Systems" and "Space and Communications" divisions. The group that brought together major names in aerospace; Boeing Military Airplane Company; Hughes Satellite Systems; Hughes Helicopters (the civilian helicopter line was divested as MD Helicopters); Piasecki Helicopter (subsequently known as Boeing Vertol and Boeing Helicopters); the McDonnell division of McDonnell Douglas; and the former North American Aviation division of Rockwell International. Boeing Defense, Space & Security made Boeing the third-largest defense contract ...
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