Algodoo

this is a engine i made that works soully off gravity. gravity in the scene switches pushing the piston back and forth. kind of like a perpetual motion machine although it still needs energy to run. the more you increase the gravity strength, the more it accelerates.

gravity strength:

100 m/s2=56 mph
200 m/s2=70 mph
300 m/s2=80 mph
400 m/s2=90 mph
500 m/s2=100 mph

it will also work better if the piston is at a higher density so you guys can mess with that

please comment and rate