RL10
Rocket engine
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The RL10 is a liquid-fuel cryogenic rocket engine built in the United States by Aerojet Rocketdyne that burns cryogenic liquid hydrogen and liquid oxygen propellants. Modern versions produce up to 110 kN of thrust per engine in vacuum. Wikipedia
Application: Upper stage engine
Cycle: Expander cycle
Diameter: 2.15 m (7 ft 1 in)
Dry weight: 301 kg (664 lb)
First flight: 1962 (RL10A-1)
Length: 4.15 m (13.6 ft) w/ nozzle extended
Mixture ratio: 5.88:1