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astronautix.com GEM 40


Designer: Hercules. Used on stages: GEM 40. Used on launch vehicles: Delta 7925. Gross Mass: 13,064 kg. Empty Mass: 1,361 kg. Propellants: Solid Thrust(vac): 50,905 kgf. Thrust(vac): 499.20 kN. Isp: 274 sec. Isp (sea level): 245 sec. Burn time: 63 sec. Diameter: 1.0 m. Length: 13.0 m. Chambers: 1. Chamber Pressure: 56.00 bar. Area Ratio: 11.00. Country: USA. Status: In Production. First Flight: 1990. Last Flight: 1999. Flown: 576. References: 455 . Comments: Air-ignited versions have nozzle ratio of 16:1, specific impulse of 283.4 sec.
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Last update 12 March 2001.
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