It feels much more powerful. You get a throttle too, so it's eady to test how much power thevmotor gives. To get the maximum from the Panasonic, you have to pedal hard, which givesca false impression, though it's still good.
the BPM has 1:5 reduction ratio against 1:16 on the Q128H. To reach 100 rpm for example, the BPM rotor has to reach 500 RPM while the Q128H's rotor to reach 2,200 RPM. Although the core of the Q128 is smaller, it you still have to add the mass of the clutch to the core. Being of two stages, I reckon both clutch units weigh about the same. Hence my question. One good thing though, the Q128H has helical gears so should be much quieter.
The inertia of the motor has no affect on the bike's acceleration. It can easily keep up with the throttle, which is damped by the controller software. The inertia of the bike and rider is much more significant as a factor in acceleration than the motor's inertia. Lift your wheel off the ground to see how quickly it can accelerate to 15mph compared with when you're riding the bike. It's the torque through the wheel and the total mass that are the only real factors in acceleration, plus maybe a bit of throttle damping, which becomes more significant in high powered systems.
Thanks for the info D8veh.I have also been curious about this motor for a long time.How is the hill climbing compared to Xiongda 48v in low speed gear.And will it overheat on long steep hills with a 100kg rider?