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Here's my 3d printed wobbler. I had everything I could printed square. It runs around 1000rpms on 20psi of air. I had the parts printed at a bureau. If anyone is interested I can share the details. I know its not making chips(there was some reaming and tapping involved), but I do that for a...

Chuck, I use turbocad or hexagon(free) for my drafting/drawing. I use blender(free) for my mesh work, organic modeling and animation. Turbocad was installed by the previous owner, i'm not sure of the cost. Blender is a very powerful package, albeit with a very steep learning curve. Bvr

Tin Falcon. Thanks for the reply. I understand pretty well how motors function. I have built more than a few drag bike engines, both 4 strokes and 2 strokes(port timing 2 strokes is so much foredom fun). I also understand that an air or steam driven motor has different requirements, hence my...

Hello Everyone, I have searched and read as many things as I could about this and have not found a specific answer. Perhaps I simply missed the answer. I'll preface this with, the engine I wish to develop will only be run on air, never steam. First question; Port size. For air use is...