This brings up a question I've had regarding dual-Etek EMs. (Keep in mind I'm an electrical dolt, so don't be afraid to set me straight if I need it.) I'm guessing here, but I think vertical bumps aren't likely to loosen a key.
My understanding is that PM motors want to run at one speed and only one speed at a given voltage. If the load increases it doesn't slow down, it just draws more current. So if you have two Eteks driving the same vehicle, being fed from one controller, any slight difference between their volatage/speed curves will cause one to drive the other. Furthermore, the two voltage/speed curves might cross, meaning one motor might be driven at low speed and be the driver at higher speed. Seems to me torque reversals are more likely to loosen a key. Or not. I'm guessing. Does anyone have experience that can proove/disproove this hypothesis? Chris On Sun, May 4, 2008 at 9:35 PM, dale henderson < [EMAIL PROTECTED]> wrote: > I've got temp tags for second bike and i started taking it on test drives, > i took it out for a 20 mile trip [ slowly breaking in the batteries ] but > had a mechanical issue 5 miles from my house. the bike was behaving oddly > so i pulled over to check it out. i have two motors [eteks] and the key for > motor shaft on one motor sprocket fell out, i got another [hardware store > near thankfully] and drove home. > > thus far the bike is great, but the hardtail is a bit rough [it shook out > a key!] however the 'break-down' got me thinking about the advantages of a > too motor system, namely i could still drive it with one motor, but i > started thinking about it more and made a little thought experiment that > i'll lay out in an accompaning email, feel free to give feed back on it. > > > harry > > Albuquerque, NM > http://www.austinev.org/evalbum/1179 > http://geocities.com/solarcookingman > > ------------------------------ > Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it > now.<http://us.rd.yahoo.com/evt=51733/*http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ> > >
