Contact: Patrick Louden Tel: (561) 796-6793 Web Site: www.pw.utc.com Pratt & Whitney Space Propulsion – RL10B-2 The RL10B-2 is a unique cryogenic upper stage engine in the long line of Pratt & Whitney dependable rocket engines. Derived from the core of the legendary RL10 that built a reputation as NASA’s most reliable upperstage engine, the RL10B-2 features the world’s largest carbon-carbon extendible nozzle. This high-expansion ratio nozzle enables the RL10B-2 to achieve a remarkable 465.5 seconds of specific impulse and lift payloads of up to 30,000 lbs. The RL10B-2 currently powers the upper stage of the medium and heavy-lift versions of Boeing’s Evolved Expendable Launch Vehicle (EELV) and commercial offerings, the Delta IV, in addition to the upper stage of the Delta III. Characteristics Thrust: 24,750 lb Weight: 664 lb Fuel/oxidizer: Liquid hydrogen/liquid oxygen Mixture ratio: 5.88:1 Specific impulse: 465.5 sec Starts (total): 15 Service life (total): 3500 sec Expansion ratio: 280:1 Length:(stowed) 86.5 (deployed) 163.5 Diameter (nozzle extension): 84.5
飞行翻译公司 www.aviation.cn 本文链接地址：space_2003_status_rl10b-2.pdf
飞行翻译公司 www.aviation.cn 本文链接地址：space_2003_status_rl10b-2.pdf
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