In an experiment related to our Apollo Guidance Computer restoration, we spin up a rate gyroscope and demonstrate how it works. Much better versions of this gyro were used in the Apollo Inertial Measurement Unit used by the guidance computer. But similar principles apply. We eventually plan to use original Apollo servo electronics with this or a similar gyroscope.

Visit Ed Thelen's (who brought us the gyros for this episode) page on gyroscopes: http://ed-thelen.org/Gyroscope.html

Credits:
Few seconds of Apollo IMU footage shamelessly taken from the outstanding NOVA documentary: Apollo's Daring Mission (which I found uploaded here:    • Video  , take a look while you can!). I believe the original footage of this sequence is from Draper Labs, who also have been supporting our AGC restoration by providing original documentation.