Engine Model: GEM 46. Designer: Hercules. Gross Mass: 19,290 kg (42,520 lb). Empty Mass: 2,280 kg (5,020 lb). Propellants: Solid. Thrust(vac): 608.100 kN (136,706 lbf). Thrust(sl): 538.000 kN (120,947 lbf). Isp: 274 sec. Isp (sea level): 242 sec. Burn time: 75 sec. Diameter: 1.17 m (3.83 ft). Length: 14.70 m (48.20 ft). Chambers: 1. Chamber Pressure: 105.00 bar. Area Ratio: 14.00. Country: USA. First Flight: 1998. Last Flight: 2004. Flown: 54. Air-ignited versions have nozzle ratio of 24.8:1, specific impulse of 284 sec.
GEM 46 used on Rocket Stages
Bibliography:- Isakowitz, Steven J, Hopkins, Joshua B, and Hopkins, Joseph P, International Reference to Space Launch Systems, AIAA, Washington DC, 2004.