Quark 125b thermaling

[Batfish]

Originally Posted by MetalMan

MGM now has the ability to disable reverse? If I remember correctly, my first MGM controller from a little over a year ago had an option for forward and brake only. Is this any different?

The first manual I can find for MGM that has an option for no reverse is the manual for software version 2.30, which is the most recent manual on MGM's site. Version 2.2 and earlier did not have this feature.

The 3 MGM controllers I've had were all purchased in the past year and none of them had this software version, or the ability to disable reverse.
If you look in the manual (http://www.mgm-compro.com/manuals/ma...x-3cb-v230.pdf), the option is the first one and is titled "Car mode -> one way". Previous manuals did not have this option.
http://www.mgm-compro.com/manuals-ar...rofi-v-22x.pdf


I actually purchased a 9920 for my buggy conversion specifically because MGM did not have a reverse-disable option a few months ago.

[BrianG]

To help cool the ESC, thus preventing thermaling (or at least prolonging it), add a heatsink to it. The nice flat bottom is where the FETs are attached, so use that spot to mount the heatsink. I know it's not the best solution, but it does work. I added a 1/8" thick L bar to my 125B along with a couple PC memory heatsinks (mostly for show) and have reduce temps by about 12 degrees F after about 15 minutes. The added thickness of the aluminum provides more thermal mass to pull the heat from the ESC and more surface area for the heat to dissipate. I'm not how much this will help in racing, but it sure as hell can't hurt!

Of course, no heatsink will work without proper airflow. If you aren't using a fan, then airflow through the truck body is paramount.

[smhertzog]

Originally Posted by BrianG

To help cool the ESC, thus preventing thermaling (or at least prolonging it), add a heatsink to it.

I added a heat sink and a different set of fans yesterday. I ran it on my track doing the outside oval for a full charge it went just over 20 min. I got 110 on the controller and 146 right were the wires go in the motor. The controller heat sink was 103 and the motor sink was 130. It was right around 80 with 90% humidity.
I used a trinity motor mount as the heatsink and switched to the small novak fans, which blow an incredible amount of air reguardless of their size.
Quark are you listening?:032: