Exposing the heatsink on your MMM?

[sikeston34m]

Originally Posted by primus95

I see no real need for a fan on 4S if geared correctly, so I agree with you there. But I would also like to keep the ESC as cool as possible , hence chopping the top.

On 5s however, IMO a fan or open case is a must, the heat generated in the ESC & motor so much greater. My motor temp goes up 20C running 5S over 4S

You're seeing such an increase in temps because you're using the same gearing.

I put together a 6S setup on an Emaxx using a heli 8 pole outrunner geared for 32mph. I was SHOCKED at how cool everything ran. This was with a MMPro btw. A good indication that amp draw was relatively low.

Motor temps and Esc temps both relate to efficiency losses. These losses stack up and create more heat as amp draw increases.

To increase the voltage and drop the amp load on the motor means more power with less heat. You must gear down to see this.