Algodoo

This is actually called a "spring engine" because it gets its power from unstable springs in which their damping factors were set to negative values. A "spawn engine" gets its power from circles (or other geometries) that "spawn" at exactly the correct time during the power stroke. The added volume of a circle suddenly appearing (spawning) in the cylinder is what pushes down on the piston.

You can see many different versions of spawn engines by searching through the Algodoo archive.

yes! did not see that i put spawn engine instead of spring engine

No problem. It just means that you are human and make mistrakes just like everyone else!

Xray - Yes, mistrakes*

That was intentional! I was wondering how long it would take before someone mentioned that!

this spawn engine does NOT use scene.addcicle!!

this project is old and i did not mean to put spawn engine sorry beucase my english is bad and i also don't know how to code spawn engine (translated)