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M56A-1
Aerojet solid rocket engine. Out of Production. Used in Aries. Solid propellant rocket stage. Second stage of Minuteman I. Used as first stage of Aries sounding rocket and various SDI targets in 1980's.

AKA: M56. Status: Out of Production. Thrust: 228.50 kN (51,369 lbf). Gross mass: 5,170 kg (11,390 lb). Unfuelled mass: 466 kg (1,027 lb). Specific impulse: 297 s. Specific impulse sea level: 270 s. Burn time: 60 s. Height: 3.96 m (12.99 ft). Diameter: 1.13 m (3.70 ft).

Thrust (sl): 207.700 kN (46,693 lbf). Thrust (sl): 21,182 kgf.

Country: USA. Launch Vehicles: Minuteman 1A, Minuteman 1B, Aries, HOE, ERIS, HPB. Propellants: Solid. Stages: M56A-1. Agency: Aerojet.
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