Motor Fans

[Will's]

Every week I see people as soon as they get off the track putting fans on their motors. How much difference does this make given that is 20mins between heats anyway?

[mattr]

With a fan you can bring the motor and esc temp down to ambient or slightly less in about 10-12 minutes.
Without, dependant on the layout/chassis and how hot it was when you pulled the shell off, and what the weather is like, you might still be looking at 40 or 50 degrees. (I'm actually geeky enough to have checked this)

[Lee24h]

A fan was the difference between my truck finishing and being pushed over the line

[Will's]

Off to the shop tomorrow for a fan!

[mattr]

If you have PSU or a "spare" output on your charger (i think most do now?) you can just use a PC cooling fan.
I got an 80mm fan, a couple of guards (to stop bits of wiring getting shredded!), and a handful of nuts and bolts and put mine together for about 5 quid.
Just plugs into an output on my PSU.

[OneKiwi]

+1 get a PC fan, they are usually really cheap quite and several have grills. You or a mate might have one from an old pc lying around.

[Will's]

Thanks for the advice!

[GrahamH7060]

I also use a PC fan , although I've mounted it to a car stand with a bit of modification so you can sit the car on it whilst it cools the whole chassis !

[Will's]

Thats just showing off now.

[GrahamH7060]

This is the underside !
It's also got multi coloured LEDs round it for a bit of bling too !

[mattr]

But that only really works with an aluminum chassis, plastic or cf doesn't conduct well enough to make it effective.

[alex97]

that's is a very ineffective way of cooling your motor.

[GrahamH7060]

Well if you look at my list of cars you'll notice they are all ( except the mini ! ) aluminium chassis vehicles , so it works adequately , besides , even if it's not the most effective way it sure looks cool & that's more important to me !

[alex97]

Is the motor in contact with the chassis? I think it would take more than 15min to cool the motor down that way.

[Col]

This is a motor fan:




This is a fan:



A motor fan will specifically cool your motor by making the fins that wrap around the motor very cold, where the fan (pretty cool BTW G) will blow ambient temp air at the entire car.
Choose which suits your purpose.

[Col]

Dam that's a big pic...

[mattr]

TBH, the first fan you've shown is a bit limited in its use. Only one of my cars has got space to get it in, the others all have top decks, wires, bits of chassis etc in the way. This seems to be fairly standard across many current cars.

Same with the stand fan, it will work on an aluminum chassis car, but not as well as a fan blowing directly on the motor. But it is convenient, you don't have to think about it. And it can't fall off........

[mattr]

Originally Posted by alex97

Is the motor in contact with the chassis? I think it would take more than 15min to cool the motor down that way.

Depends what you mean by "in contact", the aluminium motor can will be in direct contact with the motor mount, which in *some* cars will be directly screwed to the chassis, so there will be some cooling effect (DEX410 for example).
A DEX210 has no direct, metal to metal, contact between the motor and chassis (unless the motor is resting on the chassis, because its (slightly) oversized) mine has a ~1mm gap between chassis and can. So cooling the chassis will have little effect. AFAIK, most transverse motored buggies are like this, the motor plate is mounted to the gearbox (plastic) and the gearbox is bolted to the chassis. A stand mounted fan also won't do much to the ESC as there is a nice piece of insulating tape between it and the chassis!

Another benefit of the loose fan is that not only will it cool your motor, it'll also cool your ESC and (in the case of my DEX410) the centre props (which get quite hot) and the slipper..........

I have actually looked at slotting a spare chassis on my 410 to help with motor cooling in hot weather, this would make the stand mounted fan work quite nicely. But i haven't got around to it yet.

[tcboy1983]

Originally Posted by Col

This is a motor fan:




This is a fan:



A motor fan will specifically cool your motor by making the fins that wrap around the motor very cold, where the fan (pretty cool BTW G) will blow ambient temp air at the entire car.
Choose which suits your purpose.

The top fan is a cooler only used between rounds as it's to big
You can get these that clip on a small area and use different size fans

http://demonpowerproducts.co.uk/prod...oducts_id=8304

Then u can buy a fan the goes straight onto the battery +/- on the esc and after a race as u Marshall turn ur esc off but lipo plugged in and after the 5 min it's cool

[Lonestar]

The MuchMore device upthere cools the motor more thanks to its built-in Peltier than to the fan