26LikesDrag brake
05-09-2019, 09:11 AM
#47
But how would it know the motor temp? I'm not trying to be difficult, just very curious to see if that is an accurate reading. Unless the ESC has an optical pyrometer pointed at the motor, I just don't understand how it would know actual motor temps.
05-09-2019, 09:57 AM
#48
Tech Adept
many motors contain a temp sensor as part of the timing sensor board. The sensor cable carries the signal back to the esc and if your esc has data logging you can see the motor temp. I know Tekin, Hobbywing and Motiv contain temp sensors but not sure about other brands. The temp signal is called out in the spec for sensor cables so it your motor is compliant and your esc has logging you will see the signal without any modifications.
05-09-2019, 10:38 AM
#50
05-09-2019, 01:25 PM
#52
Bingo....we all hit the brakes the same number of times per lap, close to the exact same spot, we are not on 'brake' any longer than anyone manually braking. So, my question is: How would that create any more heat than manually braking?
05-09-2019, 02:16 PM
#53
There is still transit time(drag brake comes on) when going from throttle to brake and vice versa: drag brake can turn on&off over 20 times a lap, causing a little more motor heat and more esc computations(heat). You don't want current constantly fluctuating in your circuits: it generates too much heat, for not much work done.....
05-09-2019, 02:22 PM
#54
I used a drag brake on my rc when I 1st changed over from brushed to brushless .But I no longer use any drag ..and to address the we all use the brakes the same amount.No we all dont thats why Im a fast guy and others are not. I use my brakes as few times as I can.
05-09-2019, 04:06 PM
#55
No, you missed my point. Where Dan and I race, we have sportsman (21.5), stock (13.5) and mod. 21.5 is plenty fast enough and you don't need to spend a ton to remain competitive at the club level. It's also faster than the brushed stock classes it replaced.
05-09-2019, 04:15 PM
#56
There is still transit time(drag brake comes on) when going from throttle to brake and vice versa: drag brake can turn on&off over 20 times a lap, causing a little more motor heat and more esc computations(heat). You don't want current constantly fluctuating in your circuits: it generates too much heat, for not much work done.....
05-09-2019, 06:02 PM
#59
Too much Kool Aid buddy and my Jeep 4.0L is working just fine, better than the Can Am series.....lol.....
05-09-2019, 06:20 PM
#60
I can never tell if he's serious of just fn with us?
20% of my brakes doing anything they want to, isn't going to heat up jack. Compared to 9 out of 11 seconds of full throttle per lap, on black carpet thicker than tall grass.
I always pre-cool my motors a few degrees before a run by spraying them with Tag body spray.
20% of my brakes doing anything they want to, isn't going to heat up jack. Compared to 9 out of 11 seconds of full throttle per lap, on black carpet thicker than tall grass.
I always pre-cool my motors a few degrees before a run by spraying them with Tag body spray.