Hi David, To be honest, I haven't pulled the motors out to diagnose the issue. The previous battery pack was in terrible shape and the car had been out of commission for several months before the pack swap. I suspect that the brushes and commutator needed to be more gently introduced to high voltage than they were on the drag strip. Perhaps some surface corrosion was to blame.
The car still drove great after all those spark events. I could feel it pulling strongly back down the return lane to the pits. I don't imagine there will be much damage evident, other than possibly some pitting on the comm bar edges. The voltage was actually no higher than it had been with the previous pack, as the motor voltage is limited by the controller to a maximum of 190V. Matt Graham Joule Injected -----Original Message----- From: "David, FloridaAME" <[EMAIL PROTECTED]> Date: Tue, 17 Jun 2008 20:27:48 To:"'FLEAA Mailing List'" <listserv@floridaeaa.org> Subject: [FLEAA] G word on Green Planet I saw the segment about the Quiet Drag Race on the G Word show on Green Planet network last night. It was short but positive about electric vehicles not being slow. I was wondering what caused the sparks during the race. Was the voltage of the new battery pack to high for the armature commutator spacing. I wonder if the sparks or arcing effectively shorted out the armature. David Kerzel [EMAIL PROTECTED] _______________________________________________ Florida EAA mailing list listserv@floridaeaa.org http://www.floridaeaa.org _______________________________________________ Florida EAA mailing list listserv@floridaeaa.org http://www.floridaeaa.org
