Originally Posted by Heliosphere
I forgot to mention that it's not with the stock ESC, it was with a hobbyking SS 20A and then this Turnigy 30A: http://www.hobbyking.com/hobbyking/s...less_ESC_.html
one that I switched to today after discovering the high current.
I've had probably 10 flights with the new plane and 20A speed control without problem (I've also had the speed control mounted externally on the top of the plane, so it's had plenty of cooling.), hardly any full throttle flying though, mostly sedate. Didn't check the temperature of any of the components.
But the speed control shouldn't matter should it? Wouldn't it just be passing through full voltage at full throttle regardless of what type it was?
No expert here but my experience shows that the ESC does indeed make a difference. When we installed the Thunderbird 36amp to the stock motor, the motor itself sounded different (better timing, higher refresh rates??), the amps jumped from 17 to around 24, and the thrust increase was obvious, using the same prop. The motor rev'd higher, too, which means the motor was getting a higher voltage. I suppose that's it, the higher capacity ESC delivers higher voltages resulting in higher revs, which translates into amps and watts.
The stock 20amp worked fine but there's no way our heavy plane would get into the air without the larger ESC...
Installing a 25amp ESC over the stock 18a in my Wildcat showed an obvious performance increase as well.
At some point the gains go away.