/diy/ - Do It Yourself

>>1858733
>CVT transmission: about 90% efficient, which I'm guessing a bike kit uses.
>If there is no transmission, just a clutch, it could be as high as 99%.
>I'll subtract 2% for the chain drive and another 3% just because.
Regular bike kit: 85% efficiency or 15% energy loss between engine and wheel.

>E-Bike Wheel hub: 95% efficient at it's peak RPM which it never hits but let's assume anyway.
>Dynamo: 80% efficient, or if it's a conventional one like a car alternator: 55%
OP's hub assuming best case scenario and no heat loss: 76%. Assuming worse case: ~52%.

TL;DR: Op's design's redeeming feature is the option to turn off the engine and still have it move under its own power. Why he can't fucking pedal a bicycle once in a while is beyond me. He's going to see a massive loss in efficiency once he gets the tard trailer attached and even more once he realizes he's going to need a bigger, heavier battery to go with it.