So after bashing on just 2 sets of dual 3S's i was made aware of HOW HOT these motors can be. Long story short i tried a few things and they all kinda worked but felt they were lacking. I'm sure this is OVERKILL but i could NOT find anything that came close to cooling the entire motor with out some crazy complicated setup that IMO did not offer much better than just a cheap clip on fan. SO after about a days work, i came up with this.
I ran HARD on 3 sets of dual 3s today and i will say this is doing what it needs to do, cool the entire motor.
I have some GPM parts coming in and that should help cooling but i could NOT find much if any ideas or parts to do what i wanted. SO enjoy some pointless overkill spending $ and time for the sake of the hobby.
THIS thing cools VERY fast too withing about a 5 minutes its cool to the touch after running full out for an hour
I used Some 30 and 35mm rocket aluminum fans and a 40mmx40mmx10mm heat sink from amazon
2 Surpass hobby clip on coolers one of them i cut in half
Apex RC Products 1/8 / 40 Size Motor Aluminum Heat Sink #8039 From VRC hobbies
I used 12g copper wire and the twisting pulled it SUPPER tight against the motor and holds the lower from moving. It BARLEY clears the controller box.