By winding a rubber band, it could store enough energy to turn a propeller for a short duration. With a 10 foot model taking the current world record, as you can see in the video below the break ...

The fancy versions have shiny red propellers with matching wheels. Sold by the millions, these ready-to-fly gliders and rubber-band-powered airplanes have captured the imaginations of generations ...

An airplane with no propeller and wings that go flappy-flappy ... we love [Hobi Cerdas]’s build of the Pterothopter, a rubber band-powered ornithopter modeled after a pterodactyl.