-----Original Message----- From: EV [mailto:[email protected]] On Behalf Of Peter Eckhoff via EV Sent: Thursday, 28 August 2014 5:50 a.m. To: Larry Gales; Electric Vehicle Discussion List Subject: Re: [EVDL] Electric bike information
Hello Larry, This is a nice summary and I did not see any errors. ... I tried a geared bike and stripped a nylon(?) gear. The bike, motor, lead acid pack and me weighed in over 300 pounds. That is a lot of weight to put on the teeth of a nylon gear. I bought a "bearing puller" to pull the two parts apart to get at the gear... If I had to do it again, I would go with a non-geared bike. The bike I bought was a conversion and used a heavier steel bike frame....... it seems that often the nylon gears strip due to overheating. You don't have to raise the temperature much to weaken them. There are steel replacements available for some hub motors, but they are more noisy. At low speeds there is a thing that happens, current limit is basically on battery current, so if you are running at full throttle at 10 km/hr up a hill then your battery current may be ok, but the motor current is another story due to PWM. _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org For EV drag racing discussion, please use NEDRA (http://groups.yahoo.com/group/NEDRA)
