RS-68A tested at SSC

STENNIS SPACE CENTER, Miss. -- A Pratt and Whitney Rocketdyne RS-68A engine was tested Tuesday at Stennis Space Center, Miss. The engine, an upgrade of the RS-68 engine, is a liquid-hydrogen/liquid-oxygen booster engine designed to provide increased thrust and improved fuel efficiency for the Delta IV family of launch vehicles. Each RS-68A provides 702,000 pounds of lift-off thrust, or 39,000 more pounds of thrust than a basic RS-68 engine. After testing at Stennis Space Center, the engines are shipped to Decatur, Ala., for integration into a United Launch Alliance Delta IV to lift government payloads. (Source: GCAC, 05/16/12) Previous