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The descent propulsion system (DPS - pronounced 'dips') or lunar module descent engine (LMDE), internal designation VTR-10, is a variable-throttle hypergolic rocket engine invented by Gerard W. Elverum Jr. [3] [4] [5] and developed by Space Technology Laboratories (TRW) for use in the Apollo Lunar Module descent stage.
The Extended Lunar Module (ELM) used on the final three "J-class missions"—Apollo 15, 16, and 17—was upgraded. The descent engine thrust was increased by the addition of a 10-inch (250 mm) extension to the engine bell, and the descent propellant tanks were enlarged. A waste storage tank was added to the descent stage, with plumbing from the ...
The ascent propulsion system (APS) or lunar module ascent engine (LMAE) is a fixed-thrust hypergolic rocket engine developed by Bell Aerosystems for use in the Apollo Lunar Module ascent stage. It used Aerozine 50 fuel, and N 2 O 4 oxidizer.
Gravitational acceleration on the moon is roughly six times weaker than it is on Earth, so the Lunar Descent Engine didn't have to work all that hard: closer to 6,000 pounds of thrust, rather than ...
Apollo Lunar Module. The Apollo Lunar Module was a separate vehicle designed to land on the Moon and return to lunar orbit, and was the first true "spaceship" since it flew solely in the vacuum of space. It consisted of a descent stage and an ascent stage. It supplied life support systems for two astronauts for up to four to five days on the ...
Apollo 15 lunar surface operations were conducted from July 30 to August 2, 1971, by Apollo 15 Commander David Scott and Apollo Lunar Module Pilot James Irwin, who used the first Lunar Roving Vehicle to make three exploratory trips away from their landing site at the base of the Apennine Mountains, near Hadley Rille.
The flight plan for the third day in space was to have the commander and lunar module pilot enter the LM to check out its systems and use its descent engine to move the entire spacecraft. [67] The descent engine was the backup to the SPS; the ability to use it in this manner would prove critical on Apollo 13. [68]
The Apollo 17 lunar lander module left behind by US astronauts on the moon’s surface could be causing moonquakes, or small tremors, a new study revealed. Abandoned Apollo 17 lunar lander module ...