This video shows a lost technology used in the past for aircraft or missile navigation: the ball resolver.
The first part shows the theory of the ball resolver. On the second part a real ball resolver is presented and basic tests are performed on that device.
00:00 - intro
00:05 - Traveled distances calculated from speed and heading
02:48 - Ball Resolver theory
09:21 - Ball resolver patent drawing
10:32 - Nimrod Sight Computing resolver teardown
13:00 - Quick test
14:06 - Introduction to Boeing 707 navigation computer Bendix CPA-24-B1