A little more to it then that with electrics Ken. One of the side air intakes has a duct that directs air directly onto the motor. The spinner in a standard Great Planes unit that has an aluminum backplate that I cut the tip off of to get a bit more air to the motor. The bottom air intake and the second side intake provide airflow over the ESC and batteries. An electric actually has the potential to generate more heat then a glow engine.