请教关于F-1A火箭发动机的详细信息

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Manufacturer Name: F-1A. Designer: Rocketdyne. Developed in: 1967. Propellants: Lox/Kerosene. Thrust(vac): 9,189.600 kN (2,065,904 lbf). Thrust(sl): 8,003.800 kN (1,799,326 lbf). Isp: 310 sec. Isp (sea level): 270 sec. Burn time: 158 sec. Mass Engine: 8,098 kg (17,853 lb). Diameter: 3.61 m (11.84 ft). Length: 5.48 m (17.97 ft). Chambers: 1. Chamber Pressure: 70.00 bar. Area Ratio: 16.00. Thrust to Weight Ratio: 115.71. Country: USA. Status: Study 1968.
Designed for booster applications. Gas generator, pump-fed.
Isp: 337 sec. Isp (sea level): 309 sec

比冲还是要小不少的