Gross Mass: 5,434 kg (11,979 lb). Empty Mass: 820 kg (1,800 lb). Thrust (vac): 41.923 kN (9,425 lbf). Isp: 301 sec. Burn time: 322 sec. Propellants: N2O4/Aerozine-50. Isp(sl): 0 sec. Diameter: 1.38 m (4.52 ft). Span: 1.38 m (4.52 ft). Length: 5.97 m (19.58 ft). Country: USA. No Engines: 1. Engine: TR-201. Cost $ : 4.350 million. First Flight: 1972. Last Flight: 1989. No Launched: 90. No Failed: 1. Other designations: TR-201.