hydroelectric bike charger?
I'm planning a multi-day (maybe multi week) trail ride thru mountains. 36 volt lipo batteries. Checking out foldable and rollable solar chargers. Should work but slow, bulky, and heavy.
I have designed a small, lightwieght, hydro turbine that should work with a collapsable 2 inch plastic hose. If I find a stream with a six or eight foot drop, the gizmo should have sufficient power to continuously turn the bike's back wheel via a small auxiliary sprocket, once I set the bike on it's handlebars, or lift the back wheel off the ground with some sort of stand.
I understand that with the proper controller, the motor will work as a generator and recharge the battery. I believe this is the same as regenerative braking. If I camp beside a stream with a drop sufficient to turn the wheel all night, will that be sufficient to charge up the battery for the next day's riding? The wheel won't turn very fast, but it could run for 18 hours at a whack, assuming that I start each day at noon and ride until 6 pm or so. (I ride slow and walk beside the bike a lot on hills).
I would use this as my main charging method, but carry a small folding solar panel as a backup. Might take 2 days charging for 1 day riding. Does anyone have any other ideas for wilderness charging? I considered a small steam engine capable of running a 200 watt generator. That way, I could recharge anywhere with wood, water and an overnight campfire. A steam engine capable of running a 500 watt generator weighs about 50 pounds. This is way too much, even with a YAK BoB trailer. I see a lot of model steam engine kits; evidently hobbyists have been building them for a century or so. Anyone know of one that might fit this application? Can anyone give me more specifics on just how much power I would need to run a 200 watt generator? Can anyone tell me where to find such a small generator? Would an electric bike enthusiast in the SF Bay Area with more knowledge than I like to help a bit on this project? I could pay the right person for their help.