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.
National Launch System
Videos
The National Launch System was a study authorized in 1991 by President George H. W. Bush to outline alternatives to the Space Shuttle for access to Earth orbit. Shortly thereafter, NASA asked Lockheed
A National Launch System engine being test-fired at NASA's Stennis Space Center