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Castor 4BXL

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AKA: Castor 4B;TX-859. Status: In Production. Thrust: 429.00 kN (96,443 lbf). Gross mass: 11,482 kg (25,313 lb). Unfuelled mass: 1,513 kg (3,335 lb). Specific impulse: 267 s. Burn time: 61 s. Height: 8.98 m (29.48 ft). Diameter: 1.02 m (3.34 ft).

CTA's ORBEX used the Castor 4BXL version, which combined the 4XL motor with 4B's TVC system (6 degree.. First Flown: May 8, 1991. Flown: 2 to end of 1993 (100% success). Propellant Type: Tp-H8229 HTPB Polymer, with 20% Al. Propellant Shape: radially slotted center perforate. Propellant Mass Fraction: 0.868 (9969 kg). Total Impulse: 26,141 kNs vacuum at 25 Celsius. Pressure: 50.6 atm maximum and an average of 30.7 atm. Nozzle Throat Diameter: 30.84 cm. Nozzle Length: varies - SL, with altitude and canted available. Nozzle Exit Diameter: 90.2 cm. Nozzle Materials: 4130 steel. Casing Materials: 4130 steel.

Chamber Pressure: 31.10 bar. Area Ratio: 8.55. Propellant Formulation: HTPB.