Search found 581 matches

by cycleops612
Sep 23 2015 12:20pm
Forum: E-Bike Non-hub Motor Drives
Topic: Bofeili Crankshaft Drive
Replies: 30
Views: 15078

Re: Bofeili Crankshaft Drive

re http://www.dca.com.au/bofeili-gx26-26-e-bike-crank-drive-24-speed/ I have one after much research, and i shout its merits from the rooftops. 24 gears - hello - that says it all if you think on the fundamentals of the physics involved here. Its a 22kg alloy mtb w/ quality disks, gears & shocks, be...
by cycleops612
Jun 16 2015 9:13pm
Forum: E-Bike Technical
Topic: Hub motor cooling ideas
Replies: 13
Views: 1110

Re: Hub motor cooling ideas

Heat is an important problem, but isn't the answer, at least partially, readily at hand? The spokes! Maximise heat transfer from the hub to the spokes and its then quickly dissipated, certainly by the spinning wheel of a normal commuter. Conductivity could be considered in spoke choice thermal paste...
by cycleops612
Jun 16 2015 7:50am
Forum: General Discussion
Topic: Woodgas, more green than ev?
Replies: 63
Views: 8056

Re: Woodgas, more green than ev?

An example FYI?. A mate from thee past had a very big farm. He set up two cadillac engines -old- built a brick wood oven. piped the resultant gas into the motors. Ran a bit rough but provided power for about 20 people & the farm. He also made a wind generator. A 44 gal drum sliced in half vertically...
by cycleops612
Jun 16 2015 7:40am
Forum: General Discussion
Topic: Woodgas, more green than ev?
Replies: 63
Views: 8056

Re: Woodgas, more green than ev?

Wood gas isn't clean. A solar panel and a battery that lasts life of vehicle is clean. Absolutely incorrect. The wood was made via photosynthesis extracting carbon from co2 producing/releasing oxygen. Burn/bake the wood & its a zero sum game. So you are saying 100% of ebike charging is done sans fo...
by cycleops612
Jun 15 2015 8:13pm
Forum: E-Bike Technical
Topic: Fried BMS circuit card in Sydney, bottle li-lon battery
Replies: 10
Views: 736

Re: Fried BMS circuit card in Sydney, bottle li-lon battery

I am awed by the wonderful helfulness of this community on my inaugural p[ost & shamed by my tardiness in responding - long story. Thanks. As I said, I was flustered at not really being able to get a grip on a path to a solution. You folk have helped a great deal -special thanks to nobuo - well expl...
by cycleops612
Jun 10 2015 8:09pm
Forum: E-Bike Technical
Topic: Fried BMS circuit card in Sydney, bottle li-lon battery
Replies: 10
Views: 736

Fried BMS circuit card in Sydney, bottle li-lon battery

Help. Sadly I am not even sure of my question.A guy i trusted managed to carelessly fry The BMS circuit card in my 36v bottle 12 ah li-lon battery ebike pack.. being unaware of the risks of not having it til now, I have been blithely charging without BMS & it works fine tho not used due to another s...