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it is probably not restricted if it does not have these two white wires joined together:

yes, it does. The TCM's total weight is about the same as the BPM, 4.8kgs, but its inrunner motor alone weighs 2kgs, so the inrunner is about 40% in size compared to the BPM and yet, I reckon its climb ability is about 75% of the BPM. That goes to show how useful the crank drive technology is...

are you sure that the 6 threads on the Q85 lid for the brake rotor are man enough to hold the sprocket?

for comparison, the TCM crank drive motor has a reduction ratio about 24.

that pack you wanted to buy is a 4S, 4 cells in series, 16V. You need 10 cells in series, 40V to run with your BBS01. You'll have to connect two 5S packs to make a 10S pack. Can your quadcopter use 5S?

yes, I have tried all of the above and I still prefer crank drives over hub drives. My favourite CD bike so far is the Kalkhoff with Panasonic motor.

I do take your point about the front chainrings. However, the usefulness of the front derailleur is only evident when you climb unpowered very, very steep hills, I can't see that happening. bafang do not have lightweight rear motors. BTW, all the lightweight motors are front motors. How are you...

seeing that you have made up your mind, the Q85 weighs 1.76kgs http://www.avdweb.nl/solar-bike/hub-motor/cute-q-85sx-motor-test.html#h2-weight I bought stuff from bmsbattery before, they are bang up to date with the trend but the quality is not as good as bafang.

compared to front or rear hub wheel, the extra weight of the mounting kit, chain and sprocket in your design adds about 1.5kgs to the finished bike. Another factor that you may not have taken into account is noise. The crank drives are very quiet because they use helical gear and have low...

you mean like this kit? http://www.alibaba.com/product-detail/8-fun-2014-the-world-lightest_1762755436.html

forget SLAs. lipo or Lithium ion, you need 10S to use on your BBS01.

regarless of the choice of motor, it is likely that you will have to construct a mounting kit for the motor with 135mm dropout to go onto the seat tube to take a rear hub motor. The simplest solution is to ask the advertisers on this forum to send you on sale or return the motor or kit they...

like this one but with a safety cockpit.

they should have added another wheel.

I understand you now. If you have to carry two batteries on your bike, no car, make a lead to connect the two batteries in parallel. No need to buy an inverter.

so you want something like this? IIRC, d8veh converted this Diamonback with an 8-fun SWX in 2012 before the arrival of 8-Fun BBS01

indeed. I should have gone to specsavers. I think a front hub is more stealthy and just as powerful. This tandem is roughly about the same size fitted with the woosh Big Bear kit and their15AH rackbattery:

I did not know that you already have a lithium ion bottle battery. can you post a picture of your bike with the battery?

that does not seem like good advice. Crank drive needs a sprag clutch built into the bottom bracket. How are you going to do that with your bottom bracket?

I don't think I will feel safe to be strapped in on a bike. http://sinclairinnovation.com/