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Improved Orion engine

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AKA: Improved Orion-1;M112;Nike Hawk-2. Status: Retired 1975. Thrust: 13.00 kN (2,922 lbf). Gross mass: 600 kg (1,320 lb). Burn time: 32 s. Height: 5.00 m (16.40 ft). Diameter: 0.35 m (1.14 ft).

The Improved Orion motor was a bi-phase propellant system that results in thrust levels of approximately 84.5 kN during the first four seconds of motor burn then trailing off to approximately 13.3 kN until burnout around 25 seconds. The fins were generally configured to provide a burn out spin rate of four cycles per second.