Re: [ElectricMotorcycles] etek forced cooling

[Shawn M. Waggoner]

Hi Paul,   First, I agree with Damon that a CPU fan may not be much cooling, but I guess any extra cooling helps.   As far as directions, it is generally desired to have the fan blow air over the armature, then the commutator. The comm is more sensitive to dirt and debris. Getting dirt blown right at the comm while operating can potential scar the comm and damage it if dirt gets under the brushes.   A second thought is that the brushed typically get to be the hottest spot on the motor. The direct cooling of the brushes will really help.   It’s not a cut-n-dry answer, but hope it helps.   Shawn   From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of paul wiley Sent: Monday, June 19, 2006 2:48 PM To: ListServ@ElectricMotorcycles.Net Subject: [ElectricMotorcycles] etek forced cooling   For those of us using the Etek motor.....Which direction should the forced air cooling be routed? Towards the brushes or pulled thru the motor first, across the brush end? I have a 4 inch cpu fan on it now, with a 6.5 inch ready in the box (with a shroud.)   Any thoughts? Thanks Paul     Yahoo! Messenger with Voice. PC-to-Phone calls for ridiculously low rates.