Kontronik Jazz testing

Thanks Paul! I did realise it was not linear, but had no idea how non linear it is. I'm currently geared for about 35 mph so double would be 70 mph. I guess it'll take closer to 800W to hold full speed? If so, this should be a good test indeed!

BG, my steering and camber links have a lot of slop. Other than that it is running pretty well. :)

[zeropointbug]

It's actually more than the square of the speed increase. The wind drag is the square.

You have to take into account:

-wind drag
-tire resistance
-drive train resistance

So, for example going from 40mph to 80mph, the motor needs twice the torque, AND twice the speed to overcome the wind drag. Also, the whole drivetrain resistance goes up linearly, so the wind drag, which goes up as a curve with speed, and resistance, which goes up as a straight line. Add them together and it's more than the square of the speed increase. It becomes less apparent the faster you go.

Likewise, at low speeds, tire and drivetrain resistance is the major player at those speeds. Wind resistance is minimal, as it goes down drastically as you lower speed.