Here's one of my original Split Gyroscopes from back in '94:
The table saw motor is 10A @ 120V, with one pound weights. The fir strips on the bottom are springy - any other wood will snap during the phase shift. This has a much longer throw than the little 12V unit I eventually made for my video. The spokes point straight forwards at the top of the arc across the room during that half rotation. This is a Torque Accelerator (although not my first one) due to the way the plane of rotation tips. And the motor makes a loud groaning sound during operation.