RL60
The RL60 was a cryogenic rocket engine under development by Pratt & Whitney. The design is a high energy LH2/LOX expander cycle, capable of multiple restarts in space.
In 2003, Pratt & Whitney Space Propulsion had 90% of the work completed for the new RL60 replacement of the RL10 engine.
The RL60 is a cryogenic upper stage engine, designed to produce 60,000 pounds of thrust with a specific impulse of 465 seconds to meet the evolving needs of expendable launch requirements or human-rated missions.
The RL60 was to be built and tested in the US, with key components to be provided by four international industry strategic suppliers; Volvo Aero of Sweden , Ishikawajima-Harima Heavy Industries of Japan, Techspace Aero of Belgium and Chemical Automatics Design Bureau of Russia.
