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  1. J

    Shipping batteries, or cheap alternative for benchtop testing?

    Hi all! I'm building the control system for a joystick controlled electric trike for a friend in another state, and I need to come up with a 48V power source for debugging. It looks like if we buy the ebike battery that he'll eventually be using and have it shipped to me, it will be a royal pain...
  2. J

    Two stage belt/chain reduction- any experience?

    Hi all, I've been lurking a while and posting intermittently as I work on power wheelchairs for a sport called power soccer. For various reasons I'm trying come up with a better motor than the NPC T74, and due to recent developments I am becoming comfortable with the idea of moving away from...
  3. J

    Custom order of Turnigy 80-100 feasible?

    Hi All, I've been lurking for a while. I see that the Turnigy 80-100's are still backordered at Hobby King, but are available elsewhere. Does anybody here know how one might go about requesting a custom order of a quantity of these? I have an application that could really use a re-terminated...
  4. J

    Astro 3220 at low speed?

    I am starting to investigate the idea of building a power wheelchair with a pair of Astroflight 3220s, with seven turns on 48 volts, geared for just under 7 mph top speed (75 amp phase current limit, 4600 RPM top speed). I have a couple of questions. First, have people had success adding...
  5. J

    Motor controller for smooth starting of outrunner?

    Hi all, I've been reading this board for a few months, and this is my first post. It looks like a great community, and I hope this post isn't too far off topic. I have been following some of the non-hub motor e-bikes, specifically the 1kg friction drive and some of the others that use small...
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