DONFREDO: Brilliant and ingenious. What does it do ?
Matt Rose: great design and great application. Very impressed!
VideosWorthSpreading: I wonder if this would be more efficient than Angelo Dipietro's compressed air engine design.
DoNotPushHere: The integrated piston valve can be further developed... I had a similar design before watching this. Mine didn't work on vacuum (didn't intend to) but the trick was to drill on the piston: a side hole, and a bottom hole, communicating; and on the cylinder two side holes: one on apogee for exhaust, and of course one on the lowest point of the side hole of the piston. Thus, it works like a pop valve engine, but without any spring. Gotta make a video of that Anyway I love your work...it's very encouraging, since I don't have any lathe or table drill. Just a couple of simple tools
Eugene Syvyk: I think it would be great if you could scale it up, and put it on a bicycle. You would still need to pedal, but you'd have much more smooth acceleration, and much more smooth cadence on your legs.