The Thumb Fun Engine

This handsome little engine is built using aluminum bar stock. It runs by just pumping your thumb up and down. If you have never built an engine, here is a project wherein you will learn to make a crankshaft; a connecting rod; and a flywheel. The engine is just 6” long. Everybody enjoys developing a rhythm to see the flywheel spin. Plans are six, 8 ½” x 11” pages, with all drawings full size. They include a color picture.

 

Instruction Book for building the Thumb Fun Engine….$8.00 + $4.00 S & H

 

 

 

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