Gravity-powered Fans and Lights
Notes on designs for gravity-powered outdoor fans and lights
'Gravity Energy Fan' via Virginia Tech Design Studio
Compound gear ratio of 1:55
Gravity Air Fan, Awais Yarhussain Swabi KPK:
Note: this device seems like it might be able to use a more or less 'umodified' bicycle, with compound pulleys?
MON -- air ventilation, gravity battery
Small Gravity Fan Prototype
Wind-up fans
Swiss model
Vintage
Jost Air Fan (Stirling engine)
Compound Gear Train, Bicycle Parts, for Grain Mill
Gravity-powered Light prototype
Version 1:
Verison 2: