Testing Underway on Low-Throttle RL-10 for Lunar Landing

Engineers at Pratt & Whitney Rocketdyne (PWR) are dissecting their data after running a specially equipped RL-10 rocket engine at 10% of its full 13,000-lb. thrust in a series of tests aimed at using the venerable cryogenic engine for the descent stage of NASA's planned lunar lander. PWR uses a...

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