Gross Mass: 5,629 kg (12,409 lb). Empty Mass: 784 kg (1,728 lb). Thrust (vac): 41.364 kN (9,299 lbf). Isp: 280 sec. Burn time: 335 sec. Propellants: Nitric acid/UDMH. Isp(sl): 0 sec. Diameter: 1.40 m (4.50 ft). Span: 1.40 m (4.50 ft). Length: 6.28 m (20.60 ft). Country: USA. No Engines: 1. Engine: AJ10-118F. Cost $ : 2.320 million. First Flight: 1972. Last Flight: 1987. No Launched: 13. No Failed: 1.