4 PISTON MOTOR THAT JUST MIGHT WORK. YOUR THOUGHTS PLEASE...

[JohnPK]

This is an idea that I have had for quite some time.
It uses 4 pistons, 4 stationary stator mags, and 9 gears.
Neos are .75 X .25 X .125
Rotor uses same magnets and is .750 diameter.
Shield covers 234 degrees as drawn, but will certainly need
Fine tuning for coverage and timing.
Gears are 3.5 inches.

Please view my PDF drawing. ( I lack good CAD software)
You can see there is quite a mechanical advantage for the power stroke
to overcome the shield attraction.

eavogels was nice enough to create an AVI of my drawing. He might be posting it on his web site in the near future. Once you  watch the AVI it is pretty easy to understand the concept. (Please note the AVI shows the stator array and shield much larger than the actual .750)

I ordered gears and magnets yesterday, so here goes……
Your comments please…… John

[Cloxxki]

I like it!
Approaching repelling magets with the shield in place, and then the shield is removed?

If shielding really works, the uses for it seem endless.
Like the gear setup also, nifty.

Stroke just seems long for such small magnets? Did you consider giving the pistons a second magnet on the outside? Not easy, I know.

[eavogels]

A simulation of this motor is at

http://fdp.nu/dualpistondevice

Eric.

[JohnPK]

Cloxxki,
Will the shield work?I guess we will find out. Most say no. But I feel it is worth a try. It Will take some guess work to get it right I'm sure. I doubt it will do anything with out a shield of some sort.
The shield rotates with the gear and does move out of the way as the piston nears top dead center.
It is about a 3 inch stroke. Yes it is far for a small magnet. I have four strokes for that reason. But I feel it is important to keep the center stator array as small diameter as possible for the mechanical advantage to be able to move the shield at all. Thanks for your comment....
eavogels, thanks as always for your help in the animation....John

[Cloxxki]

John:
If you substitute the 4 middle gears for 2 chains, you may be able to play more with stroke length, should you want to. Or, the piston might be connected some way removed for it's gear's outer edge.

I never need much reason to kill a dead spot. So if the shielding and you machine would work, I'd suggest a mark II adding inward inward reponsion on the back stroke.

Once shielding works to any degree towards PMM though, the magnetic attempts of all of history will need to be looked at once more. Your device looks especially good as it works in straight repulsions, no rotation at the magnets. If the shielding has a weak spot, your device might already have the workaround.

I say : start cutting some wood for the simplest of attempts!