Free Piston Engine build, experiment

free piston build, experiments Tin and latex were not working for me. I decided to use materials on hand to build a larger sturdier model. working next on piston and diaphragm assembly. I think I have a good idea of how I would like to build the regenerator coil. Also still gathering parts for next tsmo and mikhail projects (Axle, pillow block, springs, bearings, etc. ) I want to thank Bladeatilla for the inspiration with the free piston video s. Also Charlie, Ron and Paul for my other projects Sorry I have be