Matching pair of bracket-bound manuals entitled “Apollo Guidance and Navigation System Study Guide / LM Primary Guidance Navigation and Control System,” dated September 9, 1966, issued as a supplement to FH3100 and prepared by the AC Electronics Division of General Motors for “LEM PGNCS, Level III, Familiarization Course SM3100.” The manuals, both 8.5 x 11, 57 pages, contain numerous figures, diagrams, and schematics related to the lunar module’s Primary Guidance, Navigation, and Control System, including: Control and Display Panels, IMU Turn-On Mode, Inertial Mode, Cage Mode, LEM Output Channels, Caution and Warning Indications, and more. In overall very good to fine condition, with light wear to covers, including some rusting to brackets. Impressive early guidebooks for the Apollo lunar module.
From the estate of NASA engineer Milton J. "Jack" Neubauer, Jr
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