gwright
Senior Heliman
Location: Melbourne, Fl
| the rotor demags at 180C which is about 300 degrees F, so 190 is not at demag point. I run things there without concern (as long as that's the stable temp they reach and they're not continually getting hotter). the issue with heat really isn't demagging as far as the hackers are concerned,.. you're not near that point at only 180~190 range. The problems comes when you reach about 200 or so,.. as things start to get very innefficient there, and the motor draws lots more current, which gets it hotter, which makes it more innefficient,..etc.etc., so if you reach 200,.. and keep flying, you normally go into thermal runaway and the time to go from 200 to 300 is very short. However, after the 200 point, normally, the current increase gets the ESC well before you demag the rotor,..i.e. 200 and rising, current goes from 25~30 amps and 70 amp surges,.. right up to 60~70 amps with 100 amp surges (yes it's this much of an increase) which pops the ESC before the motor ever reaches demag point. Many people then think they had a fualty controller, when really it's not the controller's fault at all, but motor heating due to setup. Some of the lesser motors will demag before the ESC pops due to the different magnets, so it's more obvious. |
