Encyclopedia Astronautica

American lunar logistics spacecraft. Study 1966. The Douglas Company (DAC) proposed the "Lunar Application of a Spent S-IVB Stage (LASS)". The LASS concept required a landing gear on a S-IVB Stage.

The mission was an unmanned, direct-flight, using an existing lunar beacon to obtain a precise landing location. The LASS required either a highly throttleable J-2 type engine (J-2X) or a moderately throttleable J-2S with RL-10 engines added to provide proper landing control.

DAC studied several configurations and recommended a vertical lander with a payload package on top. Landed payloads in the order of 11,000 kg were claimed by DAC with the 1965 Saturn V capability. This payload was based on a more optimistic delta-V budget than used in other studies. However, the landed payload would still be substantial (7200 - 8600 kg) using the more conservative values. The LASS was related to contemporary Douglas SASSTO studies on use of a modified S-IVB as a reusable, recoverable upper stage or as a single-stage-to-orbit launch vehicle.

AKA: Lunar Application of a Spent S-IVB Stage.

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Associated Countries
See also
  • Lunar Landers Lunar lander design started with the British Interplanetary Society's concept of 1939, followed by Von Braun's 3964 tonne monster of 1953. It then settled down to more reasonably-sized variants. Landers came in three main types: two stage versions, with the first stage being a lunar crasher that would brake the spacecraft until just above the lunar surface, then separate, allowing the second stage to land on the surface; two stage versions consisting of a descent stage that went all the way to the surface, and an ascent stage that would take the crew from the surface to lunar orbit or on an earth-return trajectory; and single stage versions, using liquid oxygen/liquid hydrogen propellants. More...

Associated Manufacturers and Agencies
  • NASA American agency overseeing development of rockets and spacecraft. National Aeronautics and Space Administration, USA, USA. More...
  • Douglas American manufacturer of rockets, spacecraft, and rocket engines. Boeing Huntington Beach, Huntington Beach, CA, USA. More...

  • Bendersky, C, Manned Lunar Program Options - Mission Equipment - Case 230, Bellcomm memo for file, Sept. 29, 1967.

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