| Castor 4 |
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Model: Castor 4. Gross Mass: 10,534 kg (23,223 lb). Empty Mass: 1,269 kg (2,797 lb). Thrust (vac): 407.211 kN (91,545 lbf). Isp: 261 sec. Burn time: 54 sec. Propellants: Solid. Isp(sl): 228 sec. Diameter: 1.02 m (3.34 ft). Span: 1.02 m (3.34 ft). Length: 9.07 m (29.75 ft). Country: USA. No Engines: 1. Motor: Castor 4. Cost $ : 2.030 million. First Flight: 1971. Last Flight: 1989. No Launched: 558. No Failed: 1.
Model: Castor 4A. Gross Mass: 11,743 kg (25,888 lb). Empty Mass: 1,529 kg (3,370 lb). Thrust (vac): 478.309 kN (107,528 lbf). Isp: 266 sec. Burn time: 56 sec. Propellants: Solid. Isp(sl): 237 sec. Diameter: 1.02 m (3.34 ft). Span: 1.02 m (3.34 ft). Length: 9.12 m (29.92 ft). Country: USA. No Engines: 1. Motor: Castor 4A. Status: Active. Cost $ : 2.030 million. First Flight: 1989. Last Flight: 2004. No Launched: 326.
Model: GEM 40. Gross Mass: 13,064 kg (28,801 lb). Empty Mass: 1,361 kg (3,000 lb). Thrust (vac): 492.931 kN (110,815 lbf). Isp: 274 sec. Burn time: 64 sec. Propellants: Solid. Isp(sl): 244 sec. Diameter: 1.02 m (3.34 ft). Span: 1.02 m (3.34 ft). Length: 12.96 m (42.51 ft). Country: USA. No Engines: 1. Motor: GEM 40. Status: Active. Cost $ : 2.500 million. First Flight: 1990. Last Flight: 2007. No Launched: 1631. No Failed: 1.
Model: Castor 4B. Gross Mass: 11,400 kg (25,100 lb). Empty Mass: 1,400 kg (3,000 lb). Thrust (vac): 430.610 kN (96,805 lbf). Isp: 281 sec. Burn time: 64 sec. Propellants: Solid. Isp(sl): 220 sec. Diameter: 1.02 m (3.34 ft). Span: 1.02 m (3.34 ft). Length: 9.20 m (30.10 ft). Country: USA. No Engines: 1. Motor: Castor 4B. Status: Out of production. Cost $ : 2.500 million. First Flight: 1995. Last Flight: 1999. No Launched: 8. Optimized for high altitude (Conestoga) Model: Castor 4XL. Gross Mass: 15,400 kg (33,900 lb). Empty Mass: 2,500 kg (5,500 lb). Thrust (vac): 745.000 kN (167,482 lbf). Isp: 283 sec. Burn time: 60 sec. Propellants: Solid. Propellant Formulation: HTPB. Diameter: 1.02 m (3.34 ft). Length: 14.90 m (48.80 ft). Country: USA. No Engines: 1. Motor: Castor 4AXL. Status: Active. First Flight: 2002. Last Flight: 2007. No Launched: 54. Used as: Castor4. Release conditions: Thiokol. Provides supplemental thrust for H-2 or H-2A. Model: H-2A SSB. Gross Mass: 15,200 kg (33,500 lb). Empty Mass: 2,100 kg (4,600 lb). Thrust (vac): 626.600 kN (140,865 lbf). Isp: 283 sec. Burn time: 60 sec. Propellants: Solid. Propellant Formulation: HTPB. Diameter: 1.02 m (3.34 ft). Span: 1.02 m (3.34 ft). Length: 14.90 m (48.80 ft). Country: USA. No Engines: 1. Motor: Castor 4AXL. Status: Active. First Flight: 2006. Last Flight: 2006. No Launched: 4. Provides supplemental thrust for H-2 or H-2A. Used on Launch Vehicles:
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