I have a number of electric flight set ups. 2 airplanes and one ornithopter. But I seem to always be fighting the overheating of one or more components. I have solved my overheating ESC problem by buying a overrated (30 amp) unit. Now it operates fine and only gets slightly warm, (no heatsink needed).

Now I am dealing with either overheating motor or battery. I can solve the battery problem by running two batteries and tying them together with a Y setup, but this can add alot of weight. Now my motors seem to overheat. Is there a formula I am missing out on?

How important is battery voltage. If battery voltage is high, doesn't the ESC reduce it to acceptable levels? If you run a 6 volt motor using a battery charged to 10 volts, will this lead to overheating or can I run it at half throttle and extent my flight?

What have you done to overcome the Overheating problems of electric flight?

Thanks, John