what i have now: 48V 12Ah LiFePO4. 26" Crystalyte 407. 72V 20A pedal-first controller, throttle, and a direct plug-in Cycle Analyst. and the bike itself, of course, including my fancy front fork/torque arm setup.
what i'd add, all from ebikes.ca: 36V 8Ah NiCad triangular pack + frame bag. 26" Nine Continent 2807. 72V 30A pedal-first controller, throttle, another Cycle Analyst. two ebikes.ca prefab torque arms. i'd also get another 26" wheel bike, letting the girl pick it out so that it suits her fancy and maximizes the chances of her actually riding it.
then out of the above i'd craft the following:
her bike: new, small bike, powered by the 407, 72V 20A controller, 36V 8Ah NiCad. keep in mind that she doesn't really like going fast, is small and light, and doesn't want to carry around a big lump of lithium as i do. i think the smaller battery will do fine at lower speeds, and she can carry it around much easier when the bike is parked.
my bike: current Novara Transfer with its snazzy rack and Nexus 7 hub, with either the fork off of her bike or a suitable steel replacement mated up with the ebikes.ca prefab torque arms; powered by the 2807 NC hub, 72V 30A controller, and my current 48V LiFePO4 pack. i like going faster, weigh more than her, and tend to ride further distances.
this plan look sane to people? alternately we might end up just getting her a plain-jane bike and leaving it unelectrified, and in that case i'd soldier on with my current gear. where we end up living come july in relation to where she'll be going to grad school will dictate much of our choices.
ebikes.ca NC kit (close but not quite what i'd want since i'd like for them to substitute a 72V 30A controller in -- i'm sure they'd be accommodating for a fair price):
my torque arms (note that the bottom part of the torque arms goes all the way around the axle. thus these would be very, very difficult to use with a NC motor, since the wires go through the axle, not exiting through a slot at an angle):
ebikes.ca torque arms, which also go around the axle but are slotted for 14mm axles as well so have more headroom, i imagine:
get some torque arms, pronto! i'm sorry to hear of your accident with the bike, by the way. my controller is mounted on the downtube so in a pinch i can always reach down and turn it off. there have been reports of controllers shorting and reverting to uncontrollable full current, and in that case i could either turn up a steep hill and stall the motor or reach down by my left calf and pull the connection to the battery.Patriot wrote:My only dilemna after seeing your custom torque arms, is that I need to fashion some torque arms as well.
My setup has a rear hub motor, and I have no torque arm that will fit properly. I found one on ebay that looks promising, but I still think it may not work right, because my dropout angles are the old 70's style, which are almost parallel to the ground.
I'll have to think of something. If I can't come up with something, my only hope is that the very wide steel dropouts will be strong enough without the need for a torque arm.
I'll have to keep an eye on those dropouts.