Apollo Direct TLM

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Apollo Direct TLM

Part of Apollo CSM

American manned spacecraft module. Study 1961. Final letdown, translation hover and landing on the lunar surface from 1800 m above the surface was performed by the terminal landing module. Engine thrust could be throttled down to 1546 kgf.

Status: Study 1961. Thrust: 50.12 kN (11,268 lbf). Gross mass: 2,773 kg (6,113 lb). Unfuelled mass: 1,240 kg (2,730 lb). Height: 1.98 m (6.49 ft). Diameter: 5.89 m (19.32 ft).

The engine was presumed to be based on a reasonable development of any one of three on-going engine programs for Apollo of the time: Aerojet General's 3600 kgf thrust Transtage engine; Reaction Motors' Model TD-294 4500 kgf thrust LEM research engine; or the 4500 kgf thrust engine under investigation by Rocketdyne for possible use in the LEM. The engine in the terminal landing module was ablatively cooled, throttleable, and had an expansion ratio of 20:1.

Recovery Equipment: 336 kg (740 lb).

Family: Manned spacecraft module. People: McDonnell. Country: USA. Spacecraft: Apollo Direct 2-Man, Gemini Lunar Lander. Propellants: N2O4/MMH. Agency: NASA.

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