There are a group or groups of people working on some interesting designs to propel a vehicle using wind only. And yes even directly into the wind....
http://www.gizmag.com/the-first-race-for-wind-powered-vehicles/9953/
Some have actually reached 64% of wind speed directly into the wind with their prop driven contraptions... Fun read if nothing else...
A dumb idea for one is inspiration for another... I work with dumb ideas all the time and they usually either teach me what not to do or turn into a pretty neat project either way I win !
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