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Old 01-20-2005, 02:47 PM   #46
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Quote:
Originally posted by JKA
Would there be an issue with connecting the fan inline with the motor leads so that when you throttle on the fan comes on, but while waiting on the grid the fan isn't on thus not draining battery (as little as it may be)?

I'm sure the cooling effect is decreased some, but are there any other issues?
but that kinda defeats the purpose of cooling...Only to have to fan spool up when you are on the throttle don't really help or at least I can see any help out of it...

Now if it was a blower on a nitro, then that would be a good set-up, but I don't think it be usefull to say the least on an electric motor
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Old 01-20-2005, 03:38 PM   #47
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Quote:
Originally posted by k_bojar
but that kinda defeats the purpose of cooling...Only to have to fan spool up when you are on the throttle don't really help or at least I can see any help out of it...
As long as its blowing air on it at some point there has to be cooling effect. As I conceded it may not be as much as a fan thats on always, but cooler nonetheless.

My concern was about amp draw etc when wired in this fashion.
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Old 01-20-2005, 04:22 PM   #48
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Anyone remember the S&K 1/10 pan-car oval body? It had a hole in the front grill. Once air entered the hole, a lexan channel led that air directly to the rear pod.

This brings about the question; Is fan driven air better than duct guided air?

Obvisouly the fan draws electrical current, whereas the duct creates aerodynamic drag. But which cools better? Which allows the car to circuit the track in less time?
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Old 01-20-2005, 05:52 PM   #49
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Quote:
Originally posted by JKA
As long as its blowing air on it at some point there has to be cooling effect. As I conceded it may not be as much as a fan thats on always, but cooler nonetheless.

My concern was about amp draw etc when wired in this fashion.
my radio shack fan stated .09 amps at 12v
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Old 01-20-2005, 06:26 PM   #50
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What is the general concensus regaurding a heat sink and a fan. I dont have the fan blowing directly on the motor itself, rather it blows across the heatsink. BTW, I have a TC3 with the big blue radial heat sink, the fan sits right in front of the motor and blows across the heatsink. Are there any added effects of having both??
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Old 01-20-2005, 06:39 PM   #51
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I think I remember Sobottka hooking his fan up to the motor wires. He's won several big races including cleveland running it that way I believe... Must work for him.

Think about it though... you don't need a fan sitting on the line and short of being on your top like a turtle you will be off the throttle very little especially in 19 or stock during the race. The fan might slow down a little but its not like it would stop instantly if you let off the throttle.
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Old 01-20-2005, 08:16 PM   #52
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I used my fan installed both on the motor tabs directly and plugged to receiver.....

after a race, the motor temp is the same......

remember when you solder the fan wires onto the motor tabs that the voltage reaches 7.2volts when the fan is operating.....

and if the fan is powered by the receiver tha voltage will reach only 6 volts (constant)....

so I think installing the cooler by the easier way is the best choice, regardless of the motor tabs or receiver.....
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Old 01-20-2005, 08:17 PM   #53
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Quote:
Originally posted by Tempest2000
Think about it though... you don't need a fan sitting on the line and short of being on your top like a turtle you will be off the throttle very little especially in 19 or stock during the race. The fan might slow down a little but its not like it would stop instantly if you let off the throttle.
Good point, Tempest! Is amp draw increased by doing it this way? I mean if Stephens is doing it this way, it must be good to go.
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Old 01-20-2005, 08:22 PM   #54
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Quote:
Originally posted by SalvadoriRacing
I used my fan installed both on the motor tabs directly and plugged to receiver.....
Creative concept, Salvadori. I take it you guys that run mod don't have problems with run time due to a cooler running motor?
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Old 01-20-2005, 08:33 PM   #55
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Quote:
Originally posted by kidDynomite
Creative concept, Salvadori. I take it you guys that run mod don't have problems with run time due to a cooler running motor?
just to clarify....

I meant I tried the fan hooked up to the motor tabs and then on the receiver........

and I found that both ways work the same......
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Old 01-20-2005, 08:35 PM   #56
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Salvador, by motor tabs you actually connected the fan wires to the motor tabs so they sucked juice of the wires going to the motor???

Thanks,
John
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Old 01-20-2005, 08:42 PM   #57
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yep.....

the fan works only when accelerating......when you release the trigger the fan stops smoothly
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Old 01-20-2005, 08:47 PM   #58
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Have you tried soldering the fan directly to the batteries so it runs at all times???

Thanks again!
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Old 01-20-2005, 08:50 PM   #59
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I did think about this......

but I've never tried.....
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Old 01-20-2005, 08:51 PM   #60
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I was thinking about it...might give it a go Sunday if I make it to the track (South Jersey and snow is a coming )
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