27,500 RPM! Tiny Combustion Engine. I tightened the Piston to the Rod ball & run a Cox Tee Dee .010.

Having lost my first .010 engine in the fire, I finally found one to replace it. Here I take it apart, clean it, and tighten the Piston to the Rod ball with a special tool. 14 grams or 1/2 ounce made it the smallest production engine in the world. 62 year old technology! See it run. For parts and engines, see http://www.coxengines.ca