I like that... the "dork" factor. <g> Part of why the e-bikes aren't catching on is probably due to that factor... IMHO. Most folks can't/won't build their...
Ah, you sound like a 'bent rider. From my experience, 'bents are a bit faster (and far more expensive) than a quality DF bike. I wouldn't change back, but... ...
Interesting, isn't it? Unfortunately, the corporate head who developed this car was replaced. He started out conservative, then turned his research department...
It has nothing to do with looks or comfort of the bike, nothing to do with bikes at all. Most people (none in this group) are just too lazy to get out of...
My Sachs Mercedes also seems like a normal bike without power at around 20 - 25 km. However if it looses power at low speed it does seem to be a pig. At this...
Sounds interesting. ... From: divorcethecar To: power-assist@yahoogroups.com Sent: Tuesday, October 01, 2002 8:01 PM Subject: [power-assist] New electric motor...
There seem to be SO MANY hub motor options in China. So far I've found Toprun, Golden Island Machinery, and Crystalyte. Who knows, I may find more. I asked...
... The folowing is from Electric Bikes NW: Bikes arrive from the manufacturer with a range (highest-lowest) of gears that suits most riders, for most riding...
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Colin
cjd121@...
Oct 2, 2002 12:04 am
... Randy, I have taken the no-load current at 48V to be 0.75 amps. At 48V, the Randy Motor specs are :- Speed Current Torque Output Effic Loss (RPM) (amps)...
I agree... we won't convert folks, but it would be nice to have an alternative for those who aren't afraid of pedaling. Don't forget my favorite... it costs...
... Hi Colin, Thanks for your your specs. you did with the information provided.It is obvious that stator design,magnet material,air gap,size and design of ...
You DON'T need a dyno to measure an electric motor torque spec. You just put the shaft in a drill press, turn the drill press on and measure the voltage out....
Sorry, I didn't mean to be derogatory about your bike. The LAFree was one bike I considered, but it wasn't available in my area. The term "tank" is from the...
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Colin
cjd121@...
Oct 2, 2002 5:43 am
... Randy, I have analysed more PMDC emotors than you have had hot dinners. You can believe me that the majority of spec curves published by motor...
Yes, I am looking at hub motors. So far I'm not sure of their ability to provide efficiency w/o causing drag when not engaged. They don't disengage & I'm not...
... do with ... to get out ... not ... I have a lot more excuses than that to not ride! But some days, there are no excuse! And man does it feel Great. So...
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Colin
cjd121@...
Oct 2, 2002 7:03 am
... Hi Randy, The only way my torque figures could be seriously wrong is if I have misunderstood your RPM figures. My understanding is that the motor spins at...
Colin if I may I would like to ask you a question about motor efficiency. would I be right in saying that PMDC motors are designed to run best at one...
... efficiency w/o ... OK, forget the Hub motor. I don't like them either but it was an easy way of 'hiding' a motor. IMHO a much better option is to hide a...
8002
Mack Tyner
tynerm@...
Oct 2, 2002 11:04 am
I have a Currie with the bolt-on motor that gets hot, and a hubmotor from Kollmorgen that is slightly bigger and never gets hot. I ride them both, but consider...
Mac Interesting what you said about the hub motor. Have you tried it on steep hills ? I have two Curries installed on my bike just for that purpose. I also...
... a dyno. ... indeed. ... have misunderstood your RPM figures. My understanding is that the motor spins at 2600RPM no load at 48.0 Volts - is this correct,...
The trick is not to bolt motors flimsily Mack. Electric motors even little 200W ones can pack a helluva torque reaction at low speeds. My first attempts to...
Well, they told me it would happen eventually. I had my doubts about the 3 backing plates because they bend the spokes when they clamp down. I'll try putting...
... Hub motors are definitely the better idea. As slick as the Currie bolt-on is, it does seem a bit tacked on and that little chain drive is a real weak link....
