Rocketdyne, which had been spun off by North American in 1955, was re-merged into Rockwell in 1984, and by that time produced most of the rocket engines used in the United States.

The contractor for the Space Shuttle Solid Rocket Boosters was Morton Thiokol ( now part of Alliant Techsystems ), for the external tank, Martin Marietta ( now Lockheed Martin ), and for the Space Shuttle main engines, Rocketdyne ( now Pratt & Whitney Rocketdyne, part of United Technologies ).

In February 2005, Boeing sold the company to Pratt & Whitney, which merged it with Pratt & Whitney Space Propulsion to form Pratt & Whitney Rocketdyne, itself a wholly owned subsidiary of United Technologies Corporation.

United Technologies put Rocketdyne up for sale in March 2012 as part of an effort to avoid selling new common shares to fund its largest-ever acquisition, the $ 16. 5 billion pending takeover of aerospace components maker Goodrich Corp.

As of July 23, 2012, GenCorp Inc. ( GY ) agreed to acquire United Technologies Corp .' s ( UTX ) Rocketdyne business for about $ 550 million.

In the sale to Pratt & Whitney, the Power Systems division of Rocketdyne was transferred to Hamilton Sundstrand, another subsidiary of United Technologies Corporation.

* Rockwell International, a former defense company in the United States, portions of which are now owned by ArvinMeritor, Boeing Integrated Defense Systems, and Pratt & Whitney Rocketdyne

Rocketdyne, Hamilton Sundstrand's industrial pumps and compressors operations, Clipper Windpower, and United Tech's fuel-cell business -- would be sold off to raise cash for the deal.

Built in the United States of America by Rocketdyne, the RS-25 burns cryogenic liquid hydrogen & liquid oxygen propellants, with each engine producing of thrust at liftoff.

Built in the United States of America by Rocketdyne, the J-2 burned cryogenic liquid hydrogen & liquid oxygen propellants, with each engine producing of thrust in vacuum.

Built in the United States of America by Pratt & Whitney Rocketdyne, the RL10 burns cryogenic liquid hydrogen & liquid oxygen propellants, with each engine producing of thrust in vacuum depending on the version in use.

It was powered by the Aerojet Mk52 mod 2 rocket engine ( later by the Rocketdyne Mk38 mod 4 ).

The test stand was modified in the early 60's for use in developing and testing the Apollo era Rocketdyne F-1 rocket engine that propelled man to the moon.

Rocketdyne Division of North American Aviation Company provided the rocket engines ; Ford Instrument Company, division of Sperry Rand Corporation, produced the guidance and control systems ; and Reynolds Metals Company fabricated fuselage assemblies as subcontractors to Chrysler.

In 1955, the rocket engine division spun off into a separate company, Rocketdyne, but it was North American that designed and built the airframe for the X-15, a rocket-powered aircraft that first flew in 1959.

* Pratt & Whitney Rocketdyne, an American company producing rocket engines

Rocketdyne is an American rocket engine design and production company headquartered in Canoga Park, California.

Rocketdyne also became the major supplier for NASA's development efforts, supplying all of the major engines for the Saturn rocket ( and potentially, the huge Nova rocket designs ).

By 1965, Rocketdyne built the vast majority of US rocket engines, excepting those of the Titan rocket, and its payroll had grown to 65, 000.

In addition to its primary business of building rocket engines, Rocketdyne has developed power generation and control systems.

The Santa Susana Field Laboratory ( SSFL ), once busy with Rocketdyne testing rocket engines and Atomics International doing nuclear research, is quiet and high in the Simi Hills west of Chatsworth.

The Orion spacecraft would have been launched into a low Earth orbit using the Ares I rocket ( the " Stick "), developed by Alliant Techsystems, Rocketdyne, and Boeing.

The F-1 is a rocket engine developed by Rocketdyne and used in the Saturn V. Five F-1 engines were used in the S-IC first stage of each Saturn V, which served as the main launch vehicle in the Apollo program.

The F-1 was originally developed by Rocketdyne to meet a 1955 US Air Force requirement for a very large rocket engine.

A source evaluation board was formed to nominate a contractor from five bidding companies, and approval was given on 1 June 1960 for Rocketdyne to begin development of a “ high-energy rocket engine, fuelled by liquid oxygen and hydrogen, to be known as the J-2 ”.

The rocket motors used were the Bristol Aerojet Mk 52 mod 2 and the Rocketdyne Mk 38 mod 4 rocket motor ; the latest is the Aerojet Hoopoe.

* Power Plant: Rocketdyne solid propellant rocket motor

The Pratt & Whitney Rocketdyne RS-68 ( Rocket System 68 ) is a liquid-fuel rocket engine that burns liquid hydrogen ( LH2 ) with liquid oxygen ( LOX ).

The design was a development of the Rolls-Royce RZ1 rocket engine, which had in turn been a development by Rolls-Royce of the Rocketdyne S3D.

This was in addition to Boeing Integrated Defense Systems ' other space assets, e. g. Delta launch vehicles, older-generation GPS satellites, and Rocketdyne and Rockwell's space operations ( which include much of the hardware used in NASA's manned space program, such as the Space Shuttle, International Space Station, rocket engines, etc.

On January 24, 2006 Rocketplane Limited announced a Space Act agreement with NASA Johnson Space Center for the loan of a Rocketdyne RS-88 rocket engine for three years, for use in flight tests of the XP vehicle.

Pratt & Whitney Rocketdyne have been commissioned by DARPA to develop a diesel Wankel engine for use in a prototype VTOL flying car called the " Transformer ".

An October 28, 2010 patent from Pratt & Whitney Rocketdyne, describes a Wankel engine superficially similar to Rolls-Royce's earlier prototype that required an external air compressor to achieve high enough compression for diesel-cycle combustion.

For the PSRE it uses the bipropellant Rocketdyne RS-14 engine.

** Stage 1: Rocketdyne A-7 engine

The first engine to include an expanding nozzle appears to be the Rocketdyne RS-129.

Rocketdyne was formed by North American Aviation after World War II to study the German V-2 missile and adapt its engine to SAE measurements and US construction details.

Rocketdyne also used the same general concept of separate burner / injectors from the V-2 engine design to build a much larger engine for the Navaho missile project.

However the Rocketdyne engine, known as the A-5 or NAA75-110, proved to be considerably more reliable than the one developed for Redstone, so the missile was redesigned with the A-5 even though the resulting missile had much shorter range.

It is of a Rocketdyne 250, 000lbs thrust aerospike engine.

Contracts for the development of a new hydrogen-burning engine were given to Rocketdyne in 1960 and for the development of the Saturn IV stage to Douglas the same year.

The Rocketdyne division of North American Aviation was awarded the engine contract, AC Spark Plug the primary inertial guidance system, Bell Labs the backup radio guidance system, and General Electric the nose cone / reentry vehicle.

The contract for this engine was given to Rocketdyne and it would be later called the J-2.

Another possibility was a Rocketdyne engine, then known as the E-1, which provided about 360, 000 to, four of which would reach the required thrust levels.

However, the recently created National Aeronautics and Space Administration appreciated the usefulness of an engine with so much power and contracted Rocketdyne to complete its development.