I just got off the phone with the owner of an Ebike store about 1/2 hour ago (Im 7 hours behind you on the clock). Ken (the store owner) is also very interested in alternative energy and has some hobby projects that he wants to build. We talked far too long on the phone but I was invited to his store to do some testing on various 36 volt Ebike hubs. My back of the envelope calculations gave me an 85 rpm cutin speed (13 volts). The cost of a new hub is roughly $250 CDN (125 Pounds?) and I believe the hub weighs about 9 lbs with an output of about 350 watts @ about 215 or 220 RPM.
There are 48 and 72 volt hubs available and I will discover more when I talk to Ken who will provide me with spec sheets and the printout of the data we generate from his wheel & hub testing dynometer. We are both pretty "pumped" (a western colony term for excited) about this meeting and I think it will take a few hours and a few cups of coffee before we begin to exhaust our idea and information exchange. Ill post the highlights in the next day or two.
Im not in this for competition, Im in it for the free flow of information concerning alternative energy. I look at it as the development of something bigger that benefits us all. We are to AE, what Linux was to Windows 15 years ago, just a bunch of guys (and I believe a saw a post or two by a gal in here somewhere) playing with the concept and sharing our experiences be they failures or successes.
Thanks Windymiller, you, like all of the contributers here have given my grey matter a little poke, and I just love problem solving on the mechanical side of this whole wind power concept. :-)
Everything should be made as simple as possible, but not one bit simpler. - Albert Einstein