Gross Mass: 267 kg (588 lb). Empty Mass: 23 kg (50 lb). Thrust (vac): 13.778 kN (3,097 lbf). Isp: 254 sec. Burn time: 39 sec. Propellants: Solid. Isp(sl): 204 sec. Diameter: 0.00 m ( ft). Span: 0.00 m ( ft). Length: 0.00 m ( ft). Country: USA. No Engines: 1. Engine: X-248. Status: Out of production. First Flight: 1960. Last Flight: 1962. No Launched: 7. No Failed: 3.