The Space Launch Initiative was a NASA and U.S. Department of Defense joint research and technology project to determine the requirements to meet all the nation’s hypersonics, space launch and space technology needs. The primary goal of this research was to increase safety and reliability and to reduce overall costs associated with building, flying and maintaining the nation’s next generation of space launch vehicles. NASA anticipated that these advances would revitalize the nation’s space transportation capabilities, and dramatically improve NASA’s ability to conduct science and exploration missions in space. This program was ended with the cancellation of the X-33 and X-34 and the conclusion of the X-43 programs. NASA is now focusing on the Constellation Program for its future of manned space flight.

RS-84 rocket engine

As part of the Space Launch Initiative, Rocketdyne developed a plan for the RS-84 rocket engine. It would have been the first reusable, Staged combustion cycle, liquid rocket engine to use a hydrocarbon fuel.

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