I have gained a great amount of knowledge and insight into electric bicycle building through the members of this site. I built a pedal assist trike and learned much about power to weight and its effects on motor heating and battery pack integrity. It is 72V/60ah,LiFePO4.
The subject: I want to build a strong enough, but very light by electric bicycle standards, e-bike that I can pedal assist to about (65kph-55kph) 40mph(not slower than 35) for 93miles with elevation gain of about 2500ft.(Remember elite long distance road racers regulatory go 50 kph) Some extra weight added for added fairings, day pack wt., and foul weather gear. Is it possible to do this with some mid drive unit of not much over 48V and maybe 60-80 ah.. High pressure road tires, good 3/4 full fairing, full pedal assist(20mph road bike effort), Best battery pack to build for this? and how to support its wt... Is there a mid/central drive motor that would work and not deter from proper pedaling action. Lighter will add to efficiency gains, as the vertical gain and speed over distance is large. I don't feel the x5 or other such hub motor is up to task(heat and eff. issues) Larger bldc /ac syc motors are difficult to mount and too much wt. aloft. I don't want 100, or even 80 kph, just 65kph for about 150km. (that's 40mph for 93mi). I want to go from the ocean to the nz alps.. and back after recharge. This should be possible, just looking for a brainstorm on the matter.................
The subject: I want to build a strong enough, but very light by electric bicycle standards, e-bike that I can pedal assist to about (65kph-55kph) 40mph(not slower than 35) for 93miles with elevation gain of about 2500ft.(Remember elite long distance road racers regulatory go 50 kph) Some extra weight added for added fairings, day pack wt., and foul weather gear. Is it possible to do this with some mid drive unit of not much over 48V and maybe 60-80 ah.. High pressure road tires, good 3/4 full fairing, full pedal assist(20mph road bike effort), Best battery pack to build for this? and how to support its wt... Is there a mid/central drive motor that would work and not deter from proper pedaling action. Lighter will add to efficiency gains, as the vertical gain and speed over distance is large. I don't feel the x5 or other such hub motor is up to task(heat and eff. issues) Larger bldc /ac syc motors are difficult to mount and too much wt. aloft. I don't want 100, or even 80 kph, just 65kph for about 150km. (that's 40mph for 93mi). I want to go from the ocean to the nz alps.. and back after recharge. This should be possible, just looking for a brainstorm on the matter.................