Angular velocity "decays"

[Ravenplucker]

While fiddling around with an engine I decided to jump start it by inputing an angular velocity value on the flywheel.

So I put in 15 rad/s, began the scene, and then went back. The 15 rad/s had turned into 14.4604 rad/s. I kept on doing it and the value kept on decaying. It would happen even when I didn't start the scene, like when I make a box and then undo it.

[Someone Else]

Hmm... I suppose you could use normal velocities.

• Hinge a small circle to the top edge of the flywheel.
• Hinge an identical circle to the bottom of the flywheel.
• Set the velocity of the top one to [30, 0].
• Set the velocity of the bottom one to [-30, 0].
• Start the scene. The wheel should spin.
• Make the small circles killers.
• Add some strategically placed killers to kill the small circles.

This angular velocity shouldn't decay.