Axial fans can shift a fair amount of air, but not against back pressure. If your ducting, or path throgh the motor puts much resistance in the way of the air, then you won't get the airflow you expect. A radial (centrifugal or 'squirrel cage') fan will work much better.
I did not know that. Thank you.
Mike -- The Electric Motorcycle Portal http://www.electricmotorcycles.net/ Electric Motorcycle Listserv http://www.electricmotorcycles.net/listserv
