The DOORS -- A Working Gravity Wheel in WM2D -- LET IT ROLL, BABY, ROLL!!

[broli]

Indeed it seems to lose gradually to a pin friction or a counter torque. I wouldn't say this is a bug though, it's just like a pendulum that keeps swinging if there's no friction.

[GraViTaR]

OK, on my new setup with the two big wheels side by side, they start out turning "downwards" onto each other. They start to slow down quite noticeably and after about five minutes they stop completely.

THEN, they start rotating in the opposite direction.

They accelerate and eventually rotate at a rate even faster than they were originally.

They peak out and maintain this more rapid rotation to the very last frame of the simulation.

I'm going to make a video of this.

[ramset]

GraVITar
is it time for a physical simulation?
Throw down the specs and I will build it !![when you are ready]
Chet

[GraViTaR]

This is a screen shot of the final frame with the rotational velocity graph of the large fixed wheel.

You can see how it starts off above zero, then at about two minutes, you can see where it stops then falls below zero into the negative and starts going in the opposite direction.

It steadily accelerates to its peak speed at about 19 minutes and stays there for about two minutes then drops back down slightly and remains there for the duration of the sim, which is where it was for a long time before it reached its peak speed.

It seems as though its acceleration and sustained rotation is a product of resonance, where the system finds its oscillatory/rotational balance and stays there.

[GraViTaR]

This is a video of the first 7:45:

http://www.youtube.com/watch?v=w0NenSh9BHg