The RL10 was USA's first liquid hydrogen fueled rocket engine. An updated version is used in several current launch vehicles. Six RL10 engines were used in the S-IV second stage of the Saturn I rocket. One or two RL10 engines are used in the Centaur upper stages of Atlas and Titan rockets. One RL10 is used in the upper stage of Delta IV rockets. There were proposals to use RL10 powered Centaur upper stages on Saturn I, Saturn IB and Saturn V rock...
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The RL10 was USA's first liquid hydrogen fueled rocket engine. An updated version is used in several current launch vehicles. Six RL10 engines were used in the S-IV second stage of the Saturn I rocket. One or two RL10 engines are used in the Centaur upper stages of Atlas and Titan rockets. One RL10 is used in the upper stage of Delta IV rockets. There were proposals to use RL10 powered Centaur upper stages on Saturn I, Saturn IB and Saturn V rockets, and the Space Shuttle.
The first flight using production versions of the RL10 engine launched November 27, 1963. For that launch, two RL10A-3 engines powered the Centaur upper stage of an Atlas launch vehicle. The launch was used to conduct a heavily instrumented performance and structural integrity test of the vehicle.
The RL10 was first tested on the ground in 1959 and first flown in 1963.
Thrust (altitude): 15,000 lbf (66.7 kN)
Burn Time: 470 s
Design: Expander cycle
Specific impulse: 433 s (4.25 kN·s/kg)
Engine weight - dry: 298 lb ...
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