This Lunar Module test article combines the Ascent Stage of LTA-1 (LM Test Article-1) with the Descent Stage of LTA-11. The LTAs that formed the backbone of the Grumman Aircraft ground test program for Apollo. LTA-1 and LTA-11 were "house" spacecraft, used to iron out problems during fabrication, assembly, and checkout. Neither stage in the current combination LTA-1A/11D was ever completed lacking skin, landing gear legs, and engines; a mockup descent engine is installed. This LM was transferred to Smithsonian ownership in 1974.
This object is not on display at the National Air and Space Museum. It is either on loan or in storage.