W.K.Coombs Open discussion thread

[bourne]

WOW bourne,

Thanks
Chet

Thanks, if this is what was indeed intended by protech it's a good way to see it. Two linear oscillators working together to form the circular motion needed.

I still think as it stands there will be too many losses for it to sustain for very long. Any oscillator with losses will eventually dampen to nothing.

For instance;
Rollers under a chunk of wood could be replaced with linear bearings. No twisting.
The pairs of repelling magnets on the buffers, I think, are a good idea, might even help in returning some of the energy from the sideways portion of the movement.
The lever will have to be very well balanced and the length ratio match the oscillation speed.
Where the pendulum meets the lever will need to be a gimbal mount as the lever motion will try and upset the gyroscopic effect of the pendulum.
Friction.

If, after all these variables are made perfect I still don't think you would  be able to extract any useful work because of this..
When swinging a ball on a string your hand movements 'Leads' the ball to constantly pull the string, causing it to accelerate. This set-up will always be 'following' the pendulum weight (lever reacting to the pendulum not pendulum reacting to the lever) causing it to stall at some point.

I could be completely wrong.

Any thoughts?

Forgot to add; If I can borrow a set of linear bearings from a friend at work I will give this some tinkering time.

[maw2432]

@ Bourne

Nice drawing!!   It looks like Mr. Milkovic's mechanical oscillation system on rollers.   
Should be fun to experiment with a low cost set-up.

I can see some promise.... but need to do some hands on. 

Bill

[Airstriker]

Some more simulations done on wm2d. Effect: looks like PM performing additional work ;] However I don't like the spring used in the simulation model - never liked the way they act on wm2d. Will do additional checks. It's a variation on Veljko Milković double oscilation model, however not used in the way Veljko uses it.

Edit: Actually there are 5 different oscilations going on over here ;]
Edit2: Oh dear. Spring eliminated. Only 3 oscilations left. Huge ammount of additional work done. Not sure if PM because of sim time limitations. Through the whole time frame the construction of total weight 30 kg is moving all the time without stopping and doing work on 300kg wheel (rotating it back and forth). I've never seen that before. Simple construction. No part to apply any sim limitation (bug) on. Looks good. Too good.

[nightlife]

Any thoughts?

I don't think the magnets will work. It needs to have a sudden stop at the base and magnets will soften the stop.
I think wheels will work just fine but I will try it with both wheels and rollers.
I did do some preliminary testing with the lever and pentium as you have pictured and it may benefit the overall outcome. I like odd configurations. There is three movements per move which makes me want to try it out. If anything, it should benefit a Milković style pump which someone I know is thinking about building. I off to build this and I will report my findings later.

[nightlife]

 I am sorry but I have to stop playing with this becuase something else just caught my attention. Check it out.

http://www.youtube.com/watch?v=Cughym4y7Ow