Space Launch Initiative
Videos
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 t
SLI art
COBRA (Co-optimized Booster for Reusable Applications) rocket engine
RS-83
RS-84
RS-68
Videos
The RS-68 was a liquid-fuel rocket engine that used liquid hydrogen and liquid oxygen as propellants in a gas-generator cycle. It was the largest hydrogen-fueled rocket engine ever flown.
An RS-68 engine undergoing hot-fire testing at NASA's Stennis Space Center during its developmental phase.
