Encyclopedia Astronautica
Castor 2


Solid propellant rocket stage. Loaded/empty mass 4,424/695 kg. Thrust 258.92 kN. Vacuum specific impulse 262 seconds.

Cost $ : 1.010 million.

Status: Study 1993.
Gross mass: 4,424 kg (9,753 lb).
Unfuelled mass: 695 kg (1,532 lb).
Height: 6.04 m (19.81 ft).
Diameter: 0.79 m (2.59 ft).
Span: 0.79 m (2.59 ft).
Thrust: 258.92 kN (58,206 lbf).
Specific impulse: 262 s.
Specific impulse sea level: 232 s.
Burn time: 37 s.
Number: 939 .

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Associated Countries
Associated Engines
  • TX-354-3 Thiokol solid rocket engine. 258.9 kN. Used in Scout A; Delta E; H-1-0; Castor 2. License built in Japan for H-1. Isp=262s. First flight 1960. More...

Associated Launch Vehicles
  • Blue Scout 1 American suborbital launch vehicle. Air Force version of Scout used for suborbital tests. More...
  • Blue Scout 2 American all-solid orbital launch vehicle. Air Force version of Scout used for suborbital and orbital military tests. More...
  • Scout B American all-solid orbital launch vehicle. Four stage vehicle consisting of 1 x Algol 2B + 1 x Castor 2 + 1 x Antares 2 + 1 x FW4S More...
  • Scout A American all-solid orbital launch vehicle. All-solid low cost lightweight launch vehicle. More...
  • Scout B 2A American all-solid orbital launch vehicle. Four stage vehicle consisting of 1 x Algol 2A + 1 x Castor 2 + 1 x Antares 2 + 1 x FW4S More...
  • Delta E1 American orbital launch vehicle. Four stage vehicle consisting of 3 x Castor + 1 x Thor DSV-2C + 1 x Delta E + 1 x FW4D More...
  • Scout X-5 American suborbital launch vehicle. Three stage vehicle consisting of 1 x Algol 2B + 1 x Castor 2 + 1 x Antares 2 More...
  • Delta J American orbital launch vehicle. Four stage vehicle consisting of 3 x Castor + 1 x Thor DSV-2C + 1 x Delta E + 1 x Star 37D More...
  • Delta N American orbital launch vehicle. Long Tank Thor augmented with 3 Castor 2 boosters and Delta E upper stage. More...
  • Delta M American orbital launch vehicle. Long Tank Thor augmented with 3 Castor 2 boosters and Delta E / Burner 2 (Star 37D) upper stages. More...
  • Thorad Agena D SLV-2H Thor Agena upgraded with Long Tank Thor stage. Variant with straight tank from Delta was Thorad (Long Tank Augmented Thrust Thor Delta) More...
  • Thorad Agena D SLV-2H Thor Agena upgraded with Long Tank Thor stage. Variant with straight tank from Delta was Thorad (Long Tank Augmented Thrust Thor Delta) More...
  • Delta L American orbital launch vehicle. Four stage vehicle consisting of 3 x Castor 2 + 1 x LT Thor DSV-2L-1B + 1 x Delta E + 1 x FW4D More...
  • Delta N6 American orbital launch vehicle. Three stage vehicle consisting of 6 x Castor 2 + 1 x LT Thor DSV-2L-1C + 1 x Delta E More...
  • Delta M6 American orbital launch vehicle. Four stage vehicle consisting of 6 x Castor 2 + 1 x LT Thor DSV-2L-1C + 1 x Delta E + 1 x Star 37D More...
  • Scout B-1 American all-solid orbital launch vehicle. Four stage vehicle consisting of 1 x Algol 2C + 1 x Castor 2 + 1 x Antares 2 + 1 x Star 20 More...
  • Scout B-1 F American all-solid orbital launch vehicle. Four stage vehicle consisting of 1 x Algol 2C + 1 x Castor 2 + 1 x Antares 2 + 1 x FW4S More...
  • Delta 0900 American orbital launch vehicle. Three stage vehicle consisting of 9 x Castor 2 + 1 x LT Thor DSV-2L-1C + 1 x DSV-3N-4 More...
  • Scout D-1 American all-solid orbital launch vehicle. Four stage vehicle consisting of 1 x Algol 3A + 1 x Castor 2 + 1 x Antares 2 + 1 x Star 20 More...
  • Delta 1604 American orbital launch vehicle. Four stage vehicle consisting of 6 x Castor 2 + 1 x ELT Thor/MB-3 + 1 x Delta F + 1 x Star 37C More...
  • Strypi VIIAR American target missile. Four stage vehicle consisting of 2 x Recruit + 1 x Castor 2 + 1 x Alcor + 1 x Alcyone More...
  • Delta 0300 American orbital launch vehicle. Three stage vehicle consisting of 3 x Castor 2 + 1 x LT Thor DSV-2L-1C + 1 x DSV-3N-4 More...
  • Delta 1914 American orbital launch vehicle. Four stage vehicle consisting of 9 x Castor 2 + 1 x ELT Thor/MB-3 + 1 x Delta P /TR-201 + 1 x Star 37C More...
  • Scout D-1 F American all-solid orbital launch vehicle. Four stage vehicle consisting of 1 x Algol 3A + 1 x Castor 2 + 1 x Antares 2 + 1 x FW4S More...
  • Delta 1913 American orbital launch vehicle. Four stage vehicle consisting of 9 x Castor 2 + 1 x ELT Thor/MB-3 + 1 x Delta P /TR-201 + 1 x Star 37D More...
  • Scout A-1 American all-solid orbital launch vehicle. Four stage vehicle consisting of 1 x Algol 2C + 1 x Castor 2 + 1 x Antares 2 + 1 x Altair 2 More...
  • Delta 1900 American orbital launch vehicle. Three stage vehicle consisting of 9 x Castor 2 + 1 x ELT Thor/MB-3 + 1 x Delta F More...
  • Delta 2313 American orbital launch vehicle. Three stage vehicle consisting of 3 x Castor 2 + 1 x ELT Thor/RS-27 + 1 x Delta P /TR-201 + 1 x Star 37D More...
  • Strypi IIAR American target missile. Two stage vehicle consisting of 2 x Recruit + 1 x Castor 2 More...
  • Delta 2914 American orbital launch vehicle. Four stage vehicle consisting of 9 x Castor 2 + 1 x ELT Thor/RS-27 + 1 x Delta P /TR-201 + 1 x Star 37E More...
  • Scout E-1 American all-solid orbital launch vehicle. Five stage vehicle consisting of 1 x Algol 3A + 1 x Castor 2 + 1 x Antares 2 + 1 x FW4S + 1 x BE-3 More...
  • Delta 2310 American orbital launch vehicle. Three stage vehicle consisting of 3 x Castor 2 + 1 x ELT Thor/RS-27 + 1 x Delta P /TR-201 More...
  • Delta 2910 American orbital launch vehicle. Three stage vehicle consisting of 9 x Castor 2 + 1 x ELT Thor/RS-27 + 1 x Delta P /TR-201 More...
  • Delta 1410 American orbital launch vehicle. Three stage vehicle consisting of 4 x Castor 2 + 1 x ELT Thor/MB-3 + 1 x Delta P /TR-201 More...
  • Scout F American all-solid orbital launch vehicle. Four stage vehicle consisting of 1 x Algol 3A + 1 x Castor 2 + 1 x Antares 2B + 1 x Star 20 More...
  • Delta 1910 American orbital launch vehicle. Three stage vehicle consisting of 9 x Castor 2 + 1 x ELT Thor/MB-3 + 1 x Delta P /TR-201 More...
  • Delta 2913 American orbital launch vehicle. Three stage vehicle consisting of 9 x Castor 2 + 1 x ELT Thor/RS-27 + 1 x Delta P /TR-201 + 1 x Star 37D More...
  • N-1 Delta Licensed version of Delta built in Japan using both US and Japanese components. 4 stage vehicle. More...
  • Scout G American all-solid orbital launch vehicle. Four stage vehicle consisting of 1 x Algol 3A + 1 x Castor 2 + 1 x Antares 3 + 1 x Star 20 More...
  • N-2 Licensed version of Delta built in Japan using both US and Japanese components. 4 stage vehicle. More...
  • N-2 (2) American orbital launch vehicle. Three stage version consisting of 9 x Castor 2 + 1 x ELT Thor N + 1 x AJ10-118FJ More...
  • H-1 Japanese license-built version of Delta launch vehicle, with Japanese-developed upper stages. More...
  • H-1 (2) American orbital launch vehicle. Three stage version consisting of 9 x Castor 2 + 1 x ELT Thor N + 1 x LE-5 More...
  • H-1 6R American orbital launch vehicle. Four stage version consisting of 6 x Castor 2 + 1 x ELT Thor N + 1 x LE-5 + 1 x UM129A More...
  • Advanced Scout American all-solid orbital launch vehicle. Proposed upgrade of Scout proposed by the University of Rome with two strap-ons from the Ariane 4. Launch would have been from Italy's San Marco platform off Kenya. Further work cancelled in 1993. 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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