What other uses are there for pull-back motors? Sets 42010 and 42011 feature a pull-back motor. They have a very high torque for a very small numbers of turns, they then free-wheel.

I'm trying to find alternate usage for them. That is anything but connecting them directly to the wheels without gears, as putting any gear demultiplication is great while the motor is turning, but it quickly prevents the vehicle moving when free wheeling.

What I've managed to do so far:


Using it to launch a spinning top
Launch a rotor blade


Anything else ?
Yoshihito Isogawa made clock mechanisms from it (well... tic-tac generators) http://www.isogawastudio.co.jp/legostudio/modelgallery_model/b077.html
and http://www.isogawastudio.co.jp/legostudio/modelgallery_model/b078.html.

Majorna created a "programmable" pull back racer http://www.eurobricks.com/forum/index.php?showtopic=69748&amp;#entry1744425

...and another clock by neomomonga: http://www.youtube.com/watch?v=F3-CDFw4O38