Algodoo

An idea for a new kind of steam engine that works with pressure and vacuum. Steam comes in on one side and pushes the piston away. Then the steam cools down. It produces a vacuum. The vacuum now helps the steam that comes from the other side to move the piston. When the piston reaches the end a little hole in the valve let air come in. The air removes the vacuum. the same thing on the other side. You can see the three valves how steam comes in and condensed water (There is no water. You have to think the water.) comes out. The primary valve is not timed perfecty but i was too lazy to find another better way. (Sorry for my English)