Gross Mass: 238 kg (524 lb). Empty Mass: 30 kg (66 lb). Thrust (vac): 12.450 kN (2,799 lbf). Isp: 256 sec. Burn time: 38 sec. Propellants: Solid. Isp(sl): 233 sec. Diameter: 0.46 m (1.50 ft). Span: 0.46 m (1.50 ft). Length: 1.83 m (6.00 ft). Country: USA. No Engines: 1. Engine: X-248. Cost $ : 0.600 million. First Flight: 1959. Last Flight: 1969. No Launched: 44. No Failed: 2.