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Old 11-07-2007, 01:57 AM   #16
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Originally Posted by -KilleR- View Post
This questions might been asked somewhere but... Here it goes...

1. Best to connect the fan via receiver or direct to batts?
2. Will any possible problem occurs if I connect 1 or more fans to receiver?

Thanks.
But how could connect in receiver if transponder has already installed?
Is necessary fan battery, could not connect to main battery directly?
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Old 11-07-2007, 05:53 AM   #17
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A good thing about wiring direct to the battery is that you can turn of the car and leave the fans running. This way when you get back from marshalling and pick your car up from scrutineering the motor has cooled down.
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Old 11-07-2007, 06:06 AM   #18
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At the recent EFRA AGM, battery direct soldering has been prohibited. Reason is that if a car has any problem marshals can't stop it's operation
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Old 11-07-2007, 06:47 AM   #19
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agreed, but that is direct soldering the battery to the speed control which is understandable.

I solder the fan wires to the speedo side of the battery plug which allows it to still be unplugged if need be but allows you to switch off the speedy and receiver but still have the battery plugged in and fans running. If you have the fan plugged into the receiver as soon as you switch off the fans are off as well.
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Old 11-07-2007, 02:13 PM   #20
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Quote:
Originally Posted by mac853 View Post
But how could connect in receiver if transponder has already installed?
Is necessary fan battery, could not connect to main battery directly?
I'm using RX431 receiver which is a 4 channel receiver.
1 to Steering Servo
1 to ESC
still got 2 extra slots since I'm not using any PT.
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Old 12-05-2007, 07:55 PM   #21
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i'm with james on fan/esc arrangement but i put in a 5v regulator in between to keep fan alive while i marshall/mess about Batt output is so high now that it can fry a 5v fan. Had that happened to a MM fan so i'm not taking chances.

Got a nice fan from farnell, epoxied it to 2 shortened 1.5mm el-cheapo allen keys that act as stand. Coupled all those to a ZPI magnesium heatsink...looks messy but they work.

Yokomo rebadge the zpi mg heatsink as yok SP-MPC
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Old 12-05-2007, 10:25 PM   #22
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I think this one included the 7.2V fan, if it's necessary to connect directly to battery wires to have enough power to transfer air?
And it's described which fits BL motor, only or also for BR motors?
Best regards
Is this one an eagle one?

If not who makes it and where can you buy it? looks lighter and a bit better than the lrp unit.
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Old 12-05-2007, 11:12 PM   #23
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anyone know if a 30 x 30mm fan is the measurment from the centre of the mounting holes or is it the measurment from one outer edge of the fan to the other outer edge.
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Old 12-05-2007, 11:20 PM   #24
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For fans its an edge to edge measurement. Motor fans are typically 30mm (except for the LRP one which is bigger). The LRP ESC uses a 25mm fan. The Novak brushless units I think use a 30mm fan.

I've just discovered the new, high output MuchMore fans - they move a lot of air. Anyone know what voltage they're rated for? I'm running my motor fans straight off the battery (which you have to in Australia) but I was wondering if that's too high for them?
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Old 12-05-2007, 11:27 PM   #25
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sweet thanks for the info
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Old 12-06-2007, 04:20 AM   #26
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Originally Posted by Swanny View Post
I'm running my motor fans straight off the battery (which you have to in Australia) but I was wondering if that's too high for them?
The fans are brushless so as long as they don't rev so high that they explode there won't be a problem.
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Old 12-06-2007, 11:44 AM   #27
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Eagle heatsink lightweight than LRP

http://rcmarket.com.hk/index.php?manufacturers_id=44
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Old 12-06-2007, 12:22 PM   #28
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The best fans by far are the ones from Sunon and Panasonic. You can order them through Digikey. Just look up 5V fans in the 25-30mm (or larger) range.
They blow away all the "hobby" fans. Even the much more fans can't touch these.
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Old 12-06-2007, 02:05 PM   #29
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Quote:
Originally Posted by linger View Post
The best fans by far are the ones from Sunon and Panasonic. You can order them through Digikey. Just look up 5V fans in the 25-30mm (or larger) range.
They blow away all the "hobby" fans. Even the much more fans can't touch these.


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Old 12-06-2007, 04:10 PM   #30
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The fans are brushless so as long as they don't rev so high that they explode there won't be a problem.
I ran a quick test using the volt out function on my charger last night and at 5V they don't move much air, so 7.2V it is for them. When I change the fan on my speedy, I'll also wire it from the battery pack to get more air movement.

I wire my fans with plugs so they can be easily disconnected if needed. I discovered the downside to the Sphere Comp TC Spec with it's permanently wired fan - it's difficult to hear the servo straining at the end of its travel when trying to set end points with the fan running, especially since its missing a blade. It will be good to be able to diconnect it when its not needed in those situations.
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