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GEM 40
Part of GEM Family
Hercules solid rocket engine. Air-ignited versions have nozzle ratio of 16:1, specific impulse of 283.4 sec. Used on Delta 7925 launch vehicle. First flight 1990.

Status: Active. Number: 936 . Thrust: 499.20 kN (112,225 lbf). Gross mass: 13,064 kg (28,801 lb). Unfuelled mass: 1,361 kg (3,000 lb). Specific impulse: 274 s. Specific impulse sea level: 245 s. Burn time: 63 s. Height: 12.96 m (42.51 ft). Diameter: 1.02 m (3.34 ft).

Thrust (sl): 446.000 kN (100,264 lbf). Thrust (sl): 45,500 kgf. Chamber Pressure: 56.00 bar. Area Ratio: 11. Propellant Formulation: HTPB.



Country: USA. Launch Vehicles: Delta 7925, Delta 7925-8, Delta 7925-10, Delta 7920-10, Delta 7920-10C, Delta 7920-8, Delta 7925-9.5, Delta 7420-10C, Delta 7326-9.5, Delta 7425-9.5, Delta 7426-9.5, Delta 7320-10, Delta 7425-10, GbI BV-Plus, Delta 7920-10L, Delta 7320-10C, Delta 7925-10L. Propellants: Solid. Stages: GEM 40. Agency: Hercules. Bibliography: 455, 9664.

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