Apollo FDAI (with housing removed)
  • Flight Director Attitude Indicator (FDAI) with housing removed.
  • Indicator mounts a ball with three axes of rotation, showing the spacecraft attitude in yaw, roll and pitch.
  • Short needles on the outer scales indicate attitude rates.
  • Longer needles over the indicator face show commanded attitudes from the spacecraft guidance system.
  • Red circles centered at yaw 0 and 180 degree poles indicate where the inertial guidance gimbals are in danger of locking (gimbals from two axes aligning with each other) causing loss of attitude reference.
  • Compare with the interior of the Space Shuttle simulator ADI (with Lunar Module simulator heritage).

4.5 lbs. (2.0 kg)

Also see:

Flown Apollo 15 FDAI:

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