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Old 01-14-2010, 02:38 AM   #16
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Originally Posted by ZiG-87 View Post
I feel that since there's usually a bit of airflow over the motor while the car is moving anyway, that a heatsink would be more effective if you could use only one.

Personally, I have a heatsink on my motor and since I don't compete in anything other than my local on-road club, I just cut a 3/4" radius semi-circle in the windshield in line with the motor. It dropped the temp by about 40 degrees.
This method doesnt work elsewhere because most competition and club racing has ruling that does not allow excessive holes and cutting on the bodyshell..

For example, a hole in the windshield. Only GP classes allows holes to be cut for engine cooling....
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Old 01-14-2010, 05:40 AM   #17
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thank you to everyones suggestions.

I will start doing some testing soon, all within a couple of hours to see whats the best set up regarding lowering temps.
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Old 01-14-2010, 06:54 AM   #18
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Originally Posted by stormperson View Post
Always a fan is more effective than a heatsink, as without airflow a heatsink doesnt dissapate the heat very well.
Depends on the size of the fan and the size of the heatsink.

You can get passive heatsinks (no fan) for computer CPU's and chipsets, try finding a 'fan only' design......you won't

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Old 01-14-2010, 07:17 AM   #19
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not forgetting the fan is also prone to wear and tear as well cogging & jam. you need to keep some for standby.
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Old 01-15-2010, 02:38 PM   #20
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Direct use fan to cool motor !
Yeah Racing Fan had Ultra Hi RPM !
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Old 01-15-2010, 03:49 PM   #21
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Direct use fan to cool motor !
Yeah Racing Fan had Ultra Hi RPM !
Probably draws a lot of power too.
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Old 01-15-2010, 04:27 PM   #22
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fan blowing just on motor is almost useless. first you need to draw heat from the motor to the heatsink that has much higher surface area and then use fan or even airflow to blow the heat away from the heatsink
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Old 01-15-2010, 07:47 PM   #23
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Probably draws a lot of power too.
That's y racers put additional 6V battery to the batt input of the Rx. That is in addition to 7.4V in use to the ESC
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Old 01-15-2010, 08:02 PM   #24
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I would hardly think a couple of fans would draw that much current that you would notice a difference in car performance. Most 25mm fans draw around 100ma.

If anything, the 6v pack that people run in addition to the lipo would be more of a disadvantage with the extra weight.
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Old 01-15-2010, 08:33 PM   #25
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I agree too... the additional batt is to help them with the weight instead adding more iron bars. RnR car is 1.4Kg for example.
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Old 01-15-2010, 08:57 PM   #26
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hv u guys check the team power air cooler kit?

i think it;s quite efficient for cooling down the motor...
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Old 01-16-2010, 07:03 AM   #27
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A fan does cool the motor down about 10 deg. They do not use any current so don't worry about it taking torque from your motor. For $10.00 it is a cheap way to keep a motor a bit cooler.
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Old 01-16-2010, 07:30 AM   #28
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hv u guys check the team power air cooler kit?

i think it;s quite efficient for cooling down the motor...
have you got a link for that?

cannot find anything about it
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Old 01-16-2010, 07:57 AM   #29
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Quote:
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have you got a link for that?

cannot find anything about it


here
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Old 01-16-2010, 08:11 AM   #30
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Doesn't say how much it weighs, it is also only any use on a motor with lots of cooling holes in ti, most don't.

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