Originally Posted by
Rich
Sailr, as you recall I have purchased a Mini Eco from you sometime ago. I have been running a sky lipo 3000 mAh 30c/ 60c burst. I have had no issues with the esc blowing. The temps stay around 100f. I think the esc it's self doesn't care about the "C" ratings. Its more the caps not being able to cop with voltage changes while running the boat. If you use a lower C rated battery the voltage changes will be larger (= more heat) then if you used a higher C rated battery (= less heat). I add caps to my MeanMachine's esc to cop with this voltage change and it brings down the temps on the caps as well. That being said, the 45c lipos are going to have less of a voltage change, so why are they blowing? What part on the esc is going up in smoke? Also take into consideration that the new 4 pole motors are going to be way more efficient then the 2 pole motors. Repeated on/off throttle also causes extra heat in the caps. Let me throw another brain teaser at you, if I were to use a 25c 2200mAh lipo, that would be 55 amps continuous, which is higher than the 30A, or the 40A for that matter, rating of the two esc's in question. Lets take this a step further, the burst of those lipos is likely to be at or above the 30c mark (depending on the lipo of course), so what is causing the problem? It is for these reasons that I cannot see the "C" rating being the cause for the esc's magic smoke. I hope someone else can give a better insight because this is an interesting discussion.