Encyclopedia Astronautica
LR105-5



ma3rdyne.jpg
MA-3
Credit: Boeing / Rocketdyne
Rocketdyne Lox/Kerosene rocket engine. 386.4 kN. Atlas E, F. Atlas Sustainer. Gas generator, pump-fed. Separate turbopumps for each booster engine. Isp=316s. First flight 1960.

Application: Atlas E, F.

Thrust (sl): 269.000 kN (60,473 lbf). Thrust (sl): 27,430 kgf. Engine: 460 kg (1,010 lb). Chamber Pressure: 48.00 bar. Area Ratio: 25. Propellant Formulation: Lox/RP-1. Thrust to Weight Ratio: 85.6521739130435. Oxidizer to Fuel Ratio: 2.25. Coefficient of Thrust vacuum: 1.84806464629871. Coefficient of Thrust sea level: 1.32723131296538.

Height: 2.70 m (8.80 ft).
Diameter: 3.05 m (10.00 ft).
Thrust: 386.40 kN (86,866 lbf).
Specific impulse: 316 s.
Specific impulse sea level: 220 s.
Burn time: 430 s.
First Launch: 1958.
Number: 289 .

More... - Chronology...


Associated Countries
See also
Associated Launch Vehicles
  • Atlas E American intercontinental ballistic missile. Initial fully operational version of Atlas ICBM. Differed in guidance system from Atlas F. Deployed as missiles from 1960 to 1966. After retirement, the ICBM's were refurbished and used over twenty years as space launch vehicles. More...
  • Atlas Agena B American orbital launch vehicle. Atlas D with improved, enlarged Agena upper stage. More...
  • Atlas F American intercontinental ballistic missile. Final operational version of Atlas ICBM. Differed in guidance systems. Deployed as missiles from 1961 to 1966. After retirement, the ICBM's were refurbished and used for over thirty years as space launch vehicles. More...
  • Atlas Agena D American orbital launch vehicle. Atlas D with further improved and lightened Agena upper stage. More...
  • Atlas SLV-3 American orbital launch vehicle. Standardized Atlas booster with no or small solid upper stage. 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
  • Atlas Agena SLV-3 Lox/Kerosene propellant rocket stage. Loaded/empty mass 117,026/2,326 kg. Thrust 386.30 kN. Vacuum specific impulse 316 seconds. More...
  • Atlas Centaur SLV-3C/D Lox/Kerosene propellant rocket stage. Loaded/empty mass 128,500/4,000 kg. Thrust 386.30 kN. Vacuum specific impulse 316 seconds. More...
  • Atlas E/F Lox/Kerosene propellant rocket stage. Loaded/empty mass 117,826/4,926 kg. Thrust 386.30 kN. Vacuum specific impulse 316 seconds. More...

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