So I dug another design here from the ruins and made a quick wm2d sim of it. Now what is apparent is that even though there's air resistance and the rectangle sweeps lots of area, there's no sign of damping in the measurements of both radial velocity and torque.
Pic:
(https://overunityarchives.com/proxy.php?request=http%3A%2F%2Fbroli.dommel.be%2Fosci1.PNG&hash=616da4b542a277a29a9ed9a0f9d7340c57403826)
File:
http://broli.dommel.be/nodder.wm2d
PS: As I was writing this post the thing seemed to have come to a stop at around 1100s but then regained motion and rising again. This also reached the frame limit, but you can always start off at any place you like by World -> Start Here or pressing ctrl+h.
It seems to get more powerful if you increase the mass of the rectangle.
Edit: At first it kept damping until it seemingly hit a resonance frequancy where things seemed to have stopped damping. What is surprising is that it seems to be at the same values as the lighter rectangle.
(https://overunityarchives.com/proxy.php?request=http%3A%2F%2Fbroli.dommel.be%2Fosci2.PNG&hash=544c5ff81cf2c5c95aa0d5c9606e169fae52e624)
I'll try and keep it running as long as possible and keep updating this picture.
Reached the frame limit again and this is what it looks like...
(https://overunityarchives.com/proxy.php?request=http%3A%2F%2Fbroli.dommel.be%2Fosci3.PNG&hash=0f7ccd1c5b14d9cb35724ce97b3e5323ac483a6e)
And still no replies? Maybe it's not perpetual motive enough for you guys ;D.
Anyways I'll start running it some more.
I hate to ask this, but is there anyway you could design something like this for me??? I don't think your going to believe the reading yuor going to find ...Your not going to trust your computer because it really will keep going
http://youtube.com/watch?v=AulAeyAjtzk
Thanks
Quote from: bradpitt on June 17, 2008, 06:26:53 PM
I hate to ask this, but is there anyway you could design something like this for me??? I don't think your going to believe the reading yuor going to find ...Your not going to trust your computer because it really will keep going
http://youtube.com/watch?v=AulAeyAjtzk
Thanks
Thank you for the reply.
Well for now I'm in no position of being able to build it. And i don't think this is the principle the double oscillator is based on. That mechanism needs a driven force while this keeps jiggling on its own. So far it seems to first damp and then keeps oscilating between those values. So far the placement of the spring is random. But attaching it on different positions on the rectangle should give different results and that's what I want to expriment with now.
Hey broli, thats an interesting thing there, have a file so I can watch it?
Quote from: Alexioco on June 18, 2008, 02:07:27 PM
Hey broli, thats an interesting thing there, have a file so I can watch it?
Sure, here you go..
http://broli.dommel.be/nodder2.avi
What is surprising is that even though airdrag is set to high the damping is extremely low.
So the part that is attached to the weight is a spring and the rest is string?
@ broli
That would be a very easy one to build. Now you need to test it out for real time.
G'day Broli,
Interesting simulation of a type of Atwood machine.
See: http://en.wikipedia.org/wiki/Atwood_machine
and: http://en.wikipedia.org/wiki/Atwood_machine
Hans von Lieven