Mamba Max Tweaks and Mods Continued

[GriffinRU]

Originally Posted by DrKnow65

Awesome! Now just fo find the perfect copper finned heat sinks (6mm tall, 24mm wide, and 32mm long- with the fins running along the length). What grit sand paper are you using? I do plan on using the new arctic MX-2 since the the whole esc will be held togeather by the case. Then I could open it back up and mod it more later without dealing with the thermal adhesive...

P.S. why use brass as apposed to copper? copper is a better conducter right?

I was also thinking about stacking copper tubing 2 high (like a honeycomb) and gluing them togeather with the arctic silver then MX-2 to the fet's. would that be effective or should I continue the persuit of somthing finned? Not sure of the purity of copper tubing...

Start with 220 grit, finish with 500.
Brass is easy to find.
I don't think that finned copper heatsink required for our application. Just copper/brass plate on the bottom and stock heatsink on top, with FAN should be good up to 150W of dissipating power ~80 Degrees C. You can stick brass plate in between top FET's and Alum heatsink, but that would be just a caviar :)
You need to make entire sandwich work for your heat spreading needs - brass/copper plates/FET's/PCB/FET's/Top heatsink. Brass/Copper for speed and Alum/PCB for mass (Cp).
And, yes you can ran FAN from internal power, just keep it under 100mA and solder on capacitor.