Encyclopedia Astronautica

TRW lox/kerosene rocket engine. 4900 kN. Booster stages. TRW design for NASA's Space Launch Initiative. The engine used duct-cooling of the main combustion chamber and materials that would not interact with kerosene to minimise coking.

The duct separated the fuel from the chamber wall and allowed controlled cooling of the chamber to keep the temperature of the kerosene down. This approach simplified the engine in comparison with competing designs. By eliminating the regenerative cooling circuit, many large manifolds and associated plumbing were eliminated as well, reducing potential failure modes and improving engine reliability. The TR107 engine used oxygen-rich combustion products to alleviate soot build-up when running the turbopumps.

Application: Booster stages.


Chamber Pressure: 177.00 bar.

Thrust: 4,900.00 kN (1,101,500 lbf).
First Launch: 2002.

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Associated Countries
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Associated Manufacturers and Agencies
  • TRW American manufacturer of rockets, spacecraft, and rocket engines. TRW Corporation, Redondo Beach, CA, USA. More...

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...

  • Mansfield, Simon, editor, Space Daily, The best source for space news on the web.. Web Address when accessed: here.

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