Ken Shirriff on Nostr: How does the FDAI's ball rotate on three axes without coming loose? The trick is that ...

How does the FDAI's ball rotate on three axes without coming loose? The trick is that the ball mechanism rotates on two axes, but is covered by a hollow shell that rotates on the third (yaw) axis. The motors for pitch and yaw axes are inside the ball, while the roll motor is outside. 2/N