Uploaded February 2025 | Updated September 2026, 1 week ago

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The ARU-11/A is the next best thing to the Apollo "8-Ball" attitude indicator. We tear one down to understand it, then hook it up, and it promptly releases the magic smoke.

Master Ken's in-depth article about his reverse engineering of the ARU-11/A: righto.com/2024/09/f4-attitude-indicator.html

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"Elevator Music" Credit: Crinoline Dreams by Kevin MacLeod

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00:00 Apollo FDAI and ARU-11
02:25 Teardown
11:02 Reverse engineering
12:30 Hookup and release of magic smoke
15:08 The slip ring had previous catastrophic damage
20:21 Three axis servomotor tests
24:09 Future work