I think on the 3 pin connectors. They have a hot ground and sensor wire. Tell the computer what it is doing. I may be wrong on this.

The suck vs. blow was referring to having the fan blow the air over the controller and motor vs. trying to have the fan blow air away from them(suck air away). The air blowing over them is much more effective.
cfm is the volume of air being moved. I was referring to where it it being moved to. :)

What do you guys use to power these fans?

I run a 5 volt fan off the 3rd channel in the receiver. Sometime, I use a 12 volt fan powered by the main battery packs.

If blowing air on the heatsink cools better then pulling the hot air away for it by sucking why do all CPU heatsink fans pull away and not blow on? You think they would do it right?

I have always heard pulling heat away from the heatsink worked the best.

O, so most of you are using a single speed so theres an empty spot on the reciever. I see.

How do you tie into the main battery with the 12V fan?

Mike, you have these fans in stock?

Pulling heat waway from the heatsink is the goal. It is achieved more effectively by blowing air over the heatsinks vs. a fan pulling air away from it. test this. Perhaps the computer folks know more about bits and bytes than they do about heat dissipation. Test it yourself and let us know the results (though I already know what you will find).


Nitro- I do have the fans. They are wired to the positive and negative leads on the controller(so when the batteries are plugged in, the fan comes on).

Si. On the 12v fans, do they take power away from the motors or no? Also, what if I ran more than 12v to the fan?
On the 5v, is there a way to plug it in even if I'm using all 3 channels? I use an Rx Pack also.

Just hook the 5 volt fan on 1 battery - esc lead. I'm powereing 1 5 volt fan and 1 12 volt fan off 1 battery and it does the trick easy.

I'm not a comp nerd at all, but sucking air away from the cpu is not the way you want to cool thing's. I've done some modding to a few pc's, including putting sweet cpu cooler's on which all blow air on the cpu, not sucking heat away from it. You can alway´s try, but be prepaired for a over heating cpu.

On my 9918's I put dual 25x25mm fans. But 40's work well, too.


BTW, guys. SOME cpu fans suck air away from the heatsink because the manufacturer doesn't want to get dust collected on the fins. It's a trade-off. Blowing is more efficient, no doubt.