Originally Posted by xniperliams
Can you tell me an example of a common controlling device for fan? Is it worthwhile though? I just need a heatsink with fan to cool down my motor. Nothing complicated. If 3rd channel of receiver will do, I would rather use it. Thanks for your advice.
Most of the heatsink/fan combos are either wired direct to the main battery or plugged into the receiver for power. They aren't controlled, they are just on all the time.
That little switch linked to above might be interesting if you really wanted to be able to switch the fan on and off. For racing there is no need.