I wish I did live in the bay area. Unfortunately I'm stuck in England although I have just moved to the coast so I can pretend :)

Very much appreciate the offer.

I'm going off of what people have said works for Minis at the two clubs I'm going to race at and then work from there.

I knew I was over thinking this. Thanks for the comic relief guys.

Seeing how we're in the midst of a fan mounting frenzy, I thought I'd protoype one from 2mm styrene. I used the heat sink bar on the motor mount as the mounting point. To make it more stable (stop it from twisting around) I'd get another set of heat sink bars, attached to both existing bars. Also, I'd make the plate from CF. styrene isn't good with any kind of heat.

Anyway, simple, cheap and puts the fan a few MMs off the end cap. Probably won't run it though. My M05 doesn't get that hot.

http://i174.photobucket.com/albums/w...psbcgkvow4.jpg

http://i174.photobucket.com/albums/w...psfmlqhu2a.jpg

http://i174.photobucket.com/albums/w...psbhdhjo4x.jpg

Man I wish that HW 13T setup would have caught on in the states. I have a couple and they're fast, fun, and cheap.

Probably toilet paper that was already used, too! Wouldn't want to waste good new TP!

Is the endbell the source of the heat on these brushless motors? I thought it was the can, similar to brushed motors.

Yes, it's the can.

Okay, so why are we placing a fan blowing on the bell? :confused:

The endbell still gets hot, and it seems like directing air across the endbell towards the motor's can would be good ...your blowing air across the entire endbell and can ...seems like it would work well to me.

W/ the standard mounting most people use (fan up on top directed straight down) seems you are only getting the top of the very outer portion of the motor and not very efficient. I plan on taking some temp tests next weekend (Easter plans this weekend, no racing) and will post what I find.

By the way, I love your design Monkeyracing ...much cleaner than mine. I may have to try it if my angled method doesn't produce results I want.

Aluminum is a very good conductor of heat. Cooling off the end bell will cool off the can since they are screwed to each other. Plus, we can really mount a fan in such a way that we can directly cool the can.

I ran my mini last night for the first time at my local track, and determined that a fan isn't really required on the orca 2200kv spec mini wcics motor. However, without the fan, I often forget to turn off the car after a run.

I wish I could remember the terminology for brushless motor parts.. 6-7wks away from RC and I forgot what the parts were called..! :lol:

Yours is angled so I thought it would have better air flow (penetration) to the end and the can.

Okay, if you are getting measureable differences then that sounds good. I was wondering because I usually cool the can as it appeared to be the source of the heat. If not the can, cool the heatsink.

We are running 21.5t brushless motors at our club. W/o a fan my motor temp was at about 160 w/ timing all the way up and after a 6min heat. My car's final laps got slower as the motor reached 160. I can see it in our lap times, ...is a 1/10th of a second slower each lap for the last 4. When I put a fan on (aimed straight down as most people do w/ the mini's) my temps were about 150 and my lap times did not slow as much ...only the last 2-3 laps. I lost our final race by a fraction of a second after leading the entire race. I attribute this to my slowing in the final laps. I figure if I can use a more efficient fan mount design I may be able to get my motor temps down even further and stop the drop off in the last laps (which I believe is due to my motor getting hotter). Its a simple thing to experiment w/ and change.

I am going to run my next practice (shooting for next Thurs) w/ all three: straight down, angled and endbell and see what the differences are (if any).

Ahhhhh that just plain nasty. :eek::nod:

The can is the source of the heat, but the sensor board is the most critical part that you want to keep cool.. and with the design of the mini, you really cant get sufficient stream of air to the can even when you angle the fan.

from my experience and info from some motor guru's, you want the fan as close as possible to the motor. move as much air as possible.

in minis they get no where near as hot as a Sedan would, so we have a little more wiggle room.. but at the end of the day, cooler is better for optimal performance, period..

R1-wurks (my motor of choice currently) likes to run around 160F... can still survive and perform at 190F... i like to keep mine at a nice 130f :sneaky::nod:

in my mini it rarely sees 120F

will be interesting to see what these new REEDY motors do..


$0.02