Castor 4 Manufacturer Name: TX-526. Other Designations: Castor 4. Designer: Thiokol. Gross Mass: 10,534 kg (23,223 lb). Empty Mass: 1,269 kg (2,797 lb). Propellants: Solid. Thrust(vac): 407.200 kN (91,542 lbf). Thrust(sl): 355.700 kN (79,965 lbf). Isp: 261 sec. Isp (sea level): 228 sec. Burn time: 54 sec. Diameter: 1.02 m (3.34 ft). Length: 9.07 m (29.75 ft). Chambers: 1. Country: USA. First Flight: 1975. Last Flight: 1989. Flown: 342. Castor 4 used on Rocket Stages Used on stage: Castor 4. on launch vehicle: Delta 3000.                   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 - 2007 except where otherwise noted.

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