Originally Posted by
Bp9145
I think I know what you're getting at. For me, at least, I like all three, motor, esc and lipos to be under 120°F(48.89°C) and the lower the better but I only sport run. Before I got a temp gun I used to use the finger touch technique, where you would place your fingers on the motor and if you can't keep it there for several seconds then it's too hot. Usually the common person can tolerate 130°F(54.4°C) on their skin before it starts to burn the skin but mine is at 120°F. But I believe generally anything under 150°F for the motor should be fine where the closer to 150°F(65.56°C) or over is starting to push it. The same goes for the batteries. I've had batteries swell up because of under "not so good conditions" or setup and the temps were only as low as 130°F and as high as 150°F. . .by the time I opened the hatch up and so there are some time lapsed. . .temps could have been and most likely much higher during failure. Then again I've had them come back with same 130°F or slightly over and they were fine.. .maybe different brands? As for the esc the highest temp I've gotten them was just slightly over 140°F(60°C). Other than that I've gotten some catch on fire and motors blown and I'm sure the temps were much higher.. .never got to check what the temp were since I was too busy putting them out . LOL . . .I know under racing or saw conditions temps are much different. .much higher and some don't really care as long as they have achieved what they wanted to do. I know I've had my share and realize I can no longer afford to burn, destroy or break anymore escs, motors or batteries. . .I'm more careful and knowledgeable now then when I was doing those things. . .I think. .LOL. Well, these figures are for me. I hope guys who compete will chime in as they generally push or test their equipment to the max . .up to the point of failure and they know what will hold up or not. But, I can tell you this, high temps on any of the three.. .esc, batteries and motor will lead to shorter lifespan. They might seem or look ok and function ok but they will not last as long as the ones that are not consistently pushed close to or at their limits. . .Neodymiium(NdFeB) magnets in motors will start to degrade and if it's really too hot the magnets will depolarze. .not good. On an esc, problems occur with the PCBA, fets or caps will the suffer . .burn or swell. Then the cells on lipos are already degrading each and every time you charge or use them so high heat or overheating them will definitely speed up the process or at very high heats at 160°F(71.1°C) or higher the possibility of affecting the cells as well as the mechanical casing of a lipo battery can definitely be seen in them swelling or catching on fire as air is introduced into the cells during the malfunction of the mechanical casing. But, there are exceptions to the make of the motor, esc or lipo batteries where their motor, esc or lipo batteries can tolerate higher temps or abuse but still in the long run they will fail or not function at their best. Unless you use military grade or commercial ones that definitely have higher tolerance than what we use, then I suggest anything under 150°F should be fine on the motor and esc and as for the lipo battery the . I hope this helps you a bit but, again these values are what I adhere to.
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