[Al Skierkiewicz]

Heatsinks do very little for motors. The majority of the heat is generated in the armature. the only path for conduction of this heat is through the shafts at either end of the motor. While teams claim they work, I feel they serve more to put the team at ease. In the case of motors with open holes, like the FP motors, there are internal fans to help cool the motors. Keep the holes unobstructed and design for the motor operational speed to be in an efficient part of the curve and the fans will do their job. They can't cool if they aren't turning.