Sjack Abeling Gravity Wheel and the Worlds first Weight Power Plant

[AquariuZ]

Now we need @mondrasek to take a look at this and analyze it. Can you dig out more examples? This is really interesting.

Well do not get too excited, I even invited a wm2d engineer to discuss this one... He said the model was "wrong" but that it was not the program´s fault, there is a thread in here somewhere...

If you run into the limit just do start here and run again where you left off. at around 68000 frames it reaches -2.5 rad/s and then all of a sudden (like it reaches a structural limit) slows all the way down to 0, starts spinning counterclockwise  stops, and starts again.

Really weird. I do not have more, this was just the one I saved.

Makes a nice screensaver

[Omnibus]

@AquariuZ,

Have you tried it scaled down from 500m to 1m, for instance? One should try to write the equations governing this and see rigorously what the conditions for it to work are.

[Omnibus]

@AquariuZ,

He said the model was "wrong" but that it was not the program´s fault,

He hasn't said that much that engineer, has he? That's why I want to hear what @mondrasek has to say. Can you find the link? Was in on bessler.com or it was on this site? This is a very interesting structure which doesn't have springs and other stuff to complicate matters. If WM2D cannot handle this simple device what good is it? One thing, as I said, I'd like to see it substantially scaled down

[hansvonlieven]

I remember the discussion with the WM2D guy at the time. He gave a lot of nonsense reasons, whatever he said did not make much sense.

My suspicion at the time was the very low mass value of the connecting piece. The engineer denied this. I told him that all you had to do was to change the mass of that piece to 1 kg or more and it would behave as expected; and that I thought there was a programme bug. At this point he became rather abusive. I left it at that.

I have a whole collection of WM2D constructs that show perpetual motion when they should not. There are a number of iteration errors, possibly caused by rounding, that are cumulative in WM2D. I think that this causes some of these problems.

Here is one example

Hans von Lieven

[Omnibus]

Hans,

Thanks for the example. However, turn on the air resistance (on low) and you'll see it'll behave normally. Recall several pages back I had a similar example exhibiting weird behavior, getting into instabilities even, and @mondrasek and someone else explained what the real story is. In @KAS's case, however, air resistance is turned on, it doesn't have complicated joints, springs etc. and still works. Like I said I'm waiting to hear what @mondrasek has to say on that.