THANK you! Great help, really got stuck with this one.
Where did you learn all this, i would like to know the source as it might come in handy to solve other practical problems.
Now me and my buddy are gonna build an awesome longboard.
I was not able to find boosted motor however, on some other longboard diys they used motor like these http://www.hobbyking.com/hobbyking/store/__18175__turnigy_aerodrive_sk3_5055_280kv_brushless_outrunner_motor.html
While my motor should be even more powerful! (Sorry swedish site)...
I would like to know what gear ratio i would need for my electric longboard. The goal is to run the longboard at 30 - 40 km/h at max power. Me and the longboards weight is approximately 65 kg. The brushless motor i am running has an rpm of approximately 18000 rpm (as it is an airplane engine)...