Back to the Purdue AAE Propulsion main page. Back to the Liquid Rockets page.

Pratt & Whitney

RL10 engine family

RL10A-4
Engine statistics
Specification RL10A-3-3A (1981) RL10A-4 (1991) RL10A-5
Applications Centaur upper stage Centaur upper stage DC-X and -XA RLV demonstrators
Propellants LOX/LH2 LOX/LH2 LOX/LH2
Thrust in Vacuum 16500 lb 20800 14650
Isp in vacuum(s) 442.4 449.0 368.0
Mixture Ratio 5.5:1 5.5:1 6:1
Weight 310 lb 370 316
Chamber Pressure ???
Expansion Ratio ???
Engine Cycle ????
Pump Design Pressures ????