using a buggy chassis as a heatsink

had a weird thought that came into my mind the other day
not sure if this is the right place to put this kind of thing
since the motor sits so close to the chassis in most buggy/truggy conversions could you perhaps make a wrap around heatsink which bolts to the chassis some how and makes contact with the metal on the chassis?
if it had a large enough contact area would it be effective?

probably a stupid idea but i thought i may as well see what you guys thought?

[jayjay283]

Tekno/Impakt has stuff like I think you're describing

[othello]

This is absolutely not a stupid idea.

Yes it would be effective. It's the cheapest, biggest and "lightest" heatsink which is also used by nitro powered cars. You can tell how good it works when you feel it warming up ... measure the difference in temperature between motor and chassis plate. This will tell you how effective it works. The lesser the difference the better the heat transfer. The motor mount has to be designed accordingly to ensure a good (quick) heat transfer from the motor to the chassis plate. An additional clamp around the motor will improve heat transfer when mounted to the chassis. Chassis flex has to be adressed though.

[streethot]

I have drilled the chassis to mount MGM esc bolted on chassis......at first time i didnt think about heat transfer, just a good place and a good way to make esc steady inside the car......but after some runs a lot of heat was transfered to the chassis.....and the car runned much better than I spected.....I was using a larger pinion and I think without that heat transfer mgm would stop to work......