Bicycle-Powered Tree House Elevator

Ethan Schlussler recently built a bicycle-powered elevator to access a 30-foot-high tree house he is building in Northern Idaho. To ascend, Schlussler sits on the bicycle and simply pedals himself aloft—ropes, pulleys, and a counterweight do most of the heavy lifting. Descent involves letting the pedals spin freely and using the bike brakes and the counterweight to control speed.

via MAKE