Pancake motor

[M_Ad]

A fine (pancake) motor, which reaches about 600 rpm, and has a good torque.
The system would use the larger gear of the rear set of gears (teeth 42).
In the motor, a gear 18 teeth, type freewheel.
It would be feasible?

 

[neptronix]

Wider stators tend to be more efficient.. how about a small yet wide RC motor tucked behind the seat or perhaps between the seat tube and the wheel?

 

[M_Ad]

Thanks for the answers.
I have a bike with hub center engine, but consider the set (motor + battery) with 9 kg too heavy.
What I seek is to have a motor only to assist in climbing. I want the bike remains ... a bicycle. For this, consider the total weight should be less than 2 kg (Ex: Grubber Assist).
Neptronix: I believe the RC engine is too thick, and, moreover, should have a gearbox. In addition, it will be far from the set of rear wheels, like a chain as short as possible.
Amberwolf: I will study your post and the engine you used (Toyota radiator fan motors).
Suggestions on fine engines will be welcome, as printed circuit motors with gears.

 

[bionicdan]

One day Id like to try something like this with added hall sensors to make a very light weight 24v booster with a 9t-90t mini chain combo

http://www.hobbyking.com/hobbyking/store/__54888__9235_100KV_Turnigy_Multistar_Brushless_Multi_Rotor_Motor.html

 

[xadmx]

http://tachometric.com/?page_id=91

http://tachometric.com/wp-content/uploads/2016/06/12570-36Fr-Alternator.pdf