X-250

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Engine Model: X-250. Designer: Hercules. Gross Mass: 4,200 kg (9,200 lb). Empty Mass: 860 kg (1,890 lb). Propellants: Solid. Diameter: 1.37 m (4.49 ft). Length: 2.10 m (6.80 ft). Country: USA. X-250 used on Rocket Stages Used on stage: X-250. on launch vehicle: Polaris. Contact us with any corrections, additions, or comments. Conditions for use of drawings, pictures, or other materials from this site.. To contact astronauts or cosmonauts. © Mark Wade, 1997 - 2008 except where otherwise noted.