Encyclopedia Astronautica
MB-3-3



mb1mb3.jpg
MB-1/MB-3
Credit: © Mark Wade
Rocketdyne Lox/Kerosene rocket engine. 866.7 kN. Out of Production. License built in Japan for H-1. Isp=290s. First flight 1964.

Thrust (sl): 756.100 kN (169,978 lbf). Thrust (sl): 77,104 kgf. Engine: 723 kg (1,593 lb). Chamber Pressure: 39.00 bar. Area Ratio: 8. Thrust to Weight Ratio: 122.240663900415. Coefficient of Thrust vacuum: 1.55303875500592. Coefficient of Thrust sea level: 1.35791680378641.

Status: Out of Production.
Unfuelled mass: 723 kg (1,593 lb).
Height: 1.70 m (5.50 ft).
Diameter: 2.44 m (8.00 ft).
Thrust: 866.70 kN (194,842 lbf).
Specific impulse: 290 s.
Specific impulse sea level: 253 s.
Burn time: 270 s.
Number: 96 .

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Associated Countries
See also
Associated Launch Vehicles
  • Delta D American orbital launch vehicle. Four stage vehicle consisting of 3 x Castor + 1 x Thor DSV-2C + 1 x Delta D + 1 x Altair 2 More...
  • Delta E American orbital launch vehicle. Thor augmented with 3 x Castor 2 motors with Delta E and Altair 2 upper stage. More...
  • Delta G American orbital launch vehicle. Three stage vehicle consisting of 3 x Castor + 1 x Thor DSV-2C + 1 x Delta E 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...
  • 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 0100 American orbital launch vehicle. The military Thor-Delta vehicles were developed into the first of a series of commercial satellite launch vehicles. The Delta 0100 series featured Castor 2 solid propellant strap-ons and a Long Tank Thor core with MB-3 engine. More...
  • H-1 Japanese license-built version of Delta launch vehicle, with Japanese-developed upper stages. More...

Associated Manufacturers and Agencies
Associated Propellants
  • Lox/Kerosene Liquid oxygen was the earliest, cheapest, safest, and eventually the preferred oxidiser for large space launchers. Its main drawback is that it is moderately cryogenic, and therefore not suitable for military uses where storage of the fuelled missile and quick launch are required. In January 1953 Rocketdyne commenced the REAP program to develop a number of improvements to the engines being developed for the Navaho and Atlas missiles. Among these was development of a special grade of kerosene suitable for rocket engines. Prior to that any number of rocket propellants derived from petroleum had been used. Goddard had begun with gasoline, and there were experimental engines powered by kerosene, diesel oil, paint thinner, or jet fuel kerosene JP-4 or JP-5. The wide variance in physical properties among fuels of the same class led to the identification of narrow-range petroleum fractions, embodied in 1954 in the standard US kerosene rocket fuel RP-1, covered by Military Specification MIL-R-25576. In Russia, similar specifications were developed for kerosene under the specifications T-1 and RG-1. The Russians also developed a compound of unknown formulation in the 1980's known as 'Sintin', or synthetic kerosene. More...

Associated Stages
  • Delta Thor TA Lox/Kerosene propellant rocket stage. Loaded/empty mass 49,442/3,175 kg. Thrust 866.71 kN. Vacuum specific impulse 290 seconds. More...
  • Delta Thor LT Lox/Kerosene propellant rocket stage. Loaded/empty mass 70,354/3,715 kg. Thrust 866.71 kN. Vacuum specific impulse 290 seconds. More...
  • H-1-1 Lox/Kerosene propellant rocket stage. Loaded/empty mass 85,800/4,400 kg. Thrust 866.71 kN. Vacuum specific impulse 290 seconds. License built MB-3 ELT Thor More...

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