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BrianG · 05.20.2009, 05:19 PM

Pah, even my Quark 125B's run cool, and they are known for running warm. Just a little added heatsinking and some decent airflow are all that's needed. After all, these are moving vehicles and movement creates airflow.

All it takes for a cooler ESC is better FETs (easier said than done, eh?). Something with less rdson, and more importantly, a higher slew rate. I don't think it will be too long before this is a reality given the advances in technology and manufacturing processes. Heck, you could just take today's FETs and stack them without any heatsinking. Just doubling the count would reduce the heat by half for a given current. So, instead of coming up with newer FETs that have more ideal specs, why not simply use more of the ones we already do have? Some of them (like on the MM/MMM) are small enough to piggy back easily. Might drive the cost up a bit, but if bought in bulk, they would be cheaper than getting a more advanced FET.

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BrianG RC-Monster Admin Offline Posts: 14,609 Join Date: Nov 2005 Location: Des Moines, IA	05.20.2009, 05:19 PM Pah, even my Quark 125B's run cool, and they are known for running warm. Just a little added heatsinking and some decent airflow are all that's needed. After all, these are moving vehicles and movement creates airflow. All it takes for a cooler ESC is better FETs (easier said than done, eh?). Something with less rdson, and more importantly, a higher slew rate. I don't think it will be too long before this is a reality given the advances in technology and manufacturing processes. Heck, you could just take today's FETs and stack them without any heatsinking. Just doubling the count would reduce the heat by half for a given current. So, instead of coming up with newer FETs that have more ideal specs, why not simply use more of the ones we already do have? Some of them (like on the MM/MMM) are small enough to piggy back easily. Might drive the cost up a bit, but if bought in bulk, they would be cheaper than getting a more advanced FET.