M55

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Model: Minuteman-1. Gross Mass: 23,077 kg (50,876 lb). Empty Mass: 2,292 kg (5,052 lb). Thrust (vac): 791.300 kN (177,891 lbf). Isp: 262 sec. Burn time: 60 sec. Propellants: Solid. Isp(sl): 237 sec. Diameter: 1.67 m (5.47 ft). Span: 1.67 m (5.47 ft). Length: 7.49 m (24.57 ft). Country: USA. No Engines: 1. Motor: M55/TX-55/Tu-122. Status: Study 1966. First Flight: 1962. Last Flight: 2007. No Launched: 329.

First stage of Minuteman I. Proposed as zero stage for various Saturn variants in 1960's. Surplus motors used in ABM SDI tests in 1980's and 1990's.

Model: Minuteman 1A T-1. Gross Mass: 22,900 kg (50,400 lb). Empty Mass: 2,500 kg (5,500 lb). Thrust (vac): 792.000 kN (178,048 lbf). Burn time: 59 sec. Propellants: Solid. Diameter: 1.68 m (5.51 ft). Length: 7.50 m (24.60 ft). Country: USA. No Engines: 1. Motor: M55A1. Status: Retired 1966. First Flight: 1959. Last Flight: 1966. No Launched: 82. Used as: Minuteman. Release conditions: Thiokol.

Used on Launch Vehicles:

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