How to make a model steam engine

This is a single-acting steam engine. That means that the steam only pushes the piston one way. The flywheel pushes it back again. The valv...

The first step is to make the valve because that is the hardest part. 1. Cut a hole in the side of a straw but not too big. 2. Put some ...

1. Put a balloon over the mouth of a small plastic bottle. The bottle is the cylinder and the balloon is the piston! Make hole in side of th...

1. Bend some coathanger wire to make the crankshaft. The part for the piston has to stick out more than the part for the valve, and the part...

1. Glue a little piece of bendy straw to the bottom of the valve. Glue a long straw to this for the steam line. 2.Glue the valve to the ho...