Edge Collective: Gravity-powered 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: