Encyclopedia Astronautica
Castor 4B


Solid propellant rocket stage. Loaded/empty mass 11,400/1,400 kg. Thrust 430.61 kN. Vacuum specific impulse 281 seconds. Optimized for high altitude (Conestoga)

Cost $ : 2.500 million.

Status: Out of production.
Gross mass: 11,400 kg (25,100 lb).
Unfuelled mass: 1,400 kg (3,000 lb).
Height: 9.20 m (30.10 ft).
Diameter: 1.02 m (3.34 ft).
Span: 1.02 m (3.34 ft).
Thrust: 430.61 kN (96,805 lbf).
Specific impulse: 281 s.
Specific impulse sea level: 220 s.
Burn time: 64 s.
Number: 8 .

More... - Chronology...


Associated Countries
Associated Engines
  • Castor 4B Thiokol solid rocket engine. 430.6 kN. Out of production. The Castor 4B, which incorporated thrust vector control in the series for the first time, was developed for ESA's Maxus (first flown in 1991). Isp=281s. First flight 1982. More...

Associated Launch Vehicles
  • Maxus The MAXUS micrograviy program was a collaboration between Sweden and Germany. The single-stage vehicle developed for the program used a Castor 4B motor, the largest fired from Western Europe. More...
  • EER Aries American low cost orbital launch vehicle. Aries launched to promote a commercial launch vehicle of entirely different configuration. More...
  • Conestoga 1620 American all-solid orbital launch vehicle. Four stage vehicle consisting of 4 x Castor 4B + 2 x Castor 4B + 1 x Castor 4B + 1 x Star 48V More...
  • Castor 4B American sounding rocket. Single stage vehicle. First launch 1996.07.15. More...
  • ait-2 American target missile. Version with a Thiokol Castor IVB first stage, and a Minuteman II M57A1 second stage. More...

Associated Propellants
  • Solid Solid propellants have the fuel and oxidiser embedded in a rubbery matrix. They were developed to a high degree of perfection in the United States in the 1950's and 1960's. In Russia, development was slower, due to a lack of technical leadership in the area and rail handling problems. Solid propellants have the fuel and oxidiser embedded in a rubbery matrix. They were developed to a high degree of perfection in the United States in the 1950's and 1960's. In Russia, development was slower, due to a lack of technical leadership in the area and rail handling problems. More...

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