Seves Di Jinn This is a water current piston. I would love to find a shop to help me build a bunch to use in mini 3 wheel racers. it is a motor in its self running on its own power minus the start up. once its wound into running mode it will run until you shut the power off. a small hand crank or an electrical starter with a small 9v battery. I see this in up close detail. So any one willing to let me work in there. I can end gas and power needs threw out the world any where in the world. A metal shop in the Lewiston or Clarkston area. All I need is time and supplies. to build a racing trike using the water current piston in the picture. I'll see you all at the race track.