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Model: Orion 50S. Gross Mass: 14,020 kg (30,900 lb). Empty Mass: 1,868 kg (4,118 lb). Thrust (vac): 484.909 kN (109,012 lbf). Isp: 294 sec. Burn time: 72 sec. Propellants: Solid. Isp(sl): 180 sec. Diameter: 1.27 m (4.16 ft). Span: 6.71 m (22.01 ft). Length: 8.88 m (29.13 ft). Country: USA. No Engines: 1. Motor: Pegasus-1. Status: Active. Cost $ : 6.000 million. First Flight: 1990. Last Flight: 2004. No Launched: 24. No Failed: 1.

Model: Orion 50SXL. Gross Mass: 17,934 kg (39,537 lb). Empty Mass: 2,886 kg (6,362 lb). Thrust (vac): 589.007 kN (132,414 lbf). Isp: 293 sec. Burn time: 73 sec. Propellants: Solid. Isp(sl): 180 sec. Diameter: 1.27 m (4.16 ft). Span: 6.71 m (22.01 ft). Length: 8.88 m (29.13 ft). Country: USA. No Engines: 1. Motor: Pegasus XL-1. Status: Active. Cost $ : 6.600 million. First Flight: 1994. Last Flight: 2007. No Launched: 61. No Failed: 1.

Model: Orion 50SG. Gross Mass: 15,000 kg (33,000 lb). Propellants: Solid. Diameter: 1.27 m (4.16 ft). Length: 10.00 m (32.00 ft). Country: USA. No Engines: 1. Motor: Orion 50SXLG. Status: Active. First Flight: 2003. Last Flight: 2007. No Launched: 6. Used as: Pegasus. Other designations: Taurus-Lite. Release conditions: OSC.

Model: Taurus-1. Gross Mass: 13,242 kg (29,193 lb). Empty Mass: 1,088 kg (2,398 lb). Thrust (vac): 484.909 kN (109,012 lbf). Isp: 285 sec. Burn time: 73 sec. Propellants: Solid. Diameter: 1.27 m (4.16 ft). Span: 1.27 m (4.16 ft). Length: 7.60 m (24.90 ft). Country: USA. No Engines: 1. Motor: Pegasus-1. Status: Active. First Flight: 2004. Last Flight: 2004. No Launched: 1.

Pegasus stage 1 without the wings and stabilisers.

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