TRW is a company group dedicated to the development of defense and space projects and systems. Also known as TRW/STL, for Space Technology Laboratory, located in California.

-TRW is a manufacturer of large launcher engines and small maneuvering engines.

“TRW, TR-201 silhouette”

- The most well-known and powerful engines are the TR-106, TR-107, and TR-201.

- The first, also known as LPCE, has a thrust of 295,000 kgf and runs on LOX/LH2.

- The TRW TR-107, built in 2002, operates on LOX and kerosene, and has a thrust of 500,000 kgf in a vacuum.

-And the TR-201, the lightest of them, with a thrust of 4,270 kgf, is used on the upper stages of the Delta P and on the Lunar Module spacecraft of the Apollo project.

-Other projects have included the MIRA, a hypergolic, liquid-fueled, variable-control rocket engine.

“TRW, MIRA”

-This brief overview covers the maneuvering engines used on the Lunar Module, based on hydrazine, and those used on the Mariner missions to Mars in 1969.

-TRW's product range includes mono- and bi-propellant engines, colloid-based, ionic, radioisotope, and electrothermal engines.

-The most commonly seen hydrazine-based thrusters are the MRE-5, giving 3 kgf, and running on N2O4/MMH.

-The 9 kgf hydrazine MRE-15/OMVs giving pulses of 0.020 seconds, capable of firing 100,000 times or cycles.

-The OMVs are variable thrust engines.

-One of them has a thrust of 58 kgf and uses dual fuel: N2O4/MMH

“Technicians with the mid-course Mariner"

-The TRW rocket engine test base is located in San Juan Capistrano, California.

From Appendix 6: Solid-fuel rocket engines have the advantage of easy storage and rapid firing without preparation.

-The TRW Company, at its Propulsion Systems Center, successfully tested a new type of engine with gel-like fuel, with the same advantages as solid fuels.

-But another additional advantage of gels is that they can be stored in tanks and flow through conduits to be loaded into the engines. They are not cryogenic.

-We know that solid fuels are usually perishable and are molded, and when their effectiveness expires, they are either fired or destroyed.

-Gel engines don't have this problem. If the fuel expires, it does so in the storage tanks. Costs are certainly reduced.

"TRW Gel Engine"

From Appendix 9: Rocket Engines, add or check.

-SEYST
-SEPS
-TR-106
-TR-107
-TR-202
-LPCE (TR-106)
-MRE-15/OMV
-MRE-5 / CO
-OMV
-MON (apogee)
-PRESS-Fed, -1000K, -200K, -25K, -5748K

From Appendix 10: TRW (Northrop Grumman Space).- USA. This brand name refers to: MIRA, URSA, Apollo Lunar Module Engine, Sentry Kew, TR-series, FMT, Mariner, LMDE...

“TR-107”

-Also the Oress, Fed., SEPST, MON, OMV, MRE...

-The TR-201 is a derivative of the LEMDE (Lunar Excursion Module Descent Engine).

“TR-201”

“TRW MIRA 150A”

-The small MIRA engines had variable power control. There are three models: the 150A, which delivered thrust between 30 and 150 lbf, built by JPL (Jet Propulsion Laboratory).

-The MIRA 500, with thrusts from 25 to 500 lbf, and the MIRA 5000, from 250 to 5,000 lbf.

“TRW Apollo LMDE”

-The LMDE was built around 1963 for NASA/Grumman.

-Another TRW engine series was the URSA, a family of small engines for universal use in space applications.

-These engines were manufactured in 1966, and there were three models: the URSA 25R, the 100R, and the 200R.

“URSA 25R, 200R y 100R”

-These engines have been used on Gemini, Apollo, Dyna-Soar, and the Manned Orbiting Laboratory, among other systems.

“TRW LMDE, cross-section”

“Checking an LMDE Engine”

“TRW LMDE Engine”