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Engine Model: UM-129A. Designer: Nissan. Gross Mass: 2,200 kg (4,800 lb). Empty Mass: 360 kg (790 lb). Propellants: Solid. Thrust(vac): 77.500 kN (17,423 lbf). Thrust(sl): 58.600 kN (13,174 lbf). Isp: 291 sec. Isp (sea level): 220 sec. Burn time: 68 sec. Diameter: 1.34 m (4.39 ft). Length: 2.34 m (7.67 ft). Chambers: 1. Area Ratio: 54.00. Country: Japan. Status: In Production. Used in H-1-3.
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