Gross Mass: 397 kg (875 lb). Empty Mass: 87 kg (191 lb). Thrust (vac): 29.400 kN (6,609 lbf). Isp: 278 sec. Burn time: 28 sec. Propellants: Solid. Isp(sl): 245 sec. Diameter: 0.69 m (2.26 ft). Span: 0.69 m (2.26 ft). Length: 1.22 m (4.00 ft). Country: UK. No Engines: 1. Engine: Black Arrow-3. Status: Out of production. Cost $ : 1.000 million. First Flight: 1969. Last Flight: 1971. No Launched: 4.