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Old 10-09-2018, 03:02 PM
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Originally Posted by Tractagator View Post
Made a brass fan mount for my sons car. He was shy on weight, heavy on the battery side, and I dont trust his driving enough to put faith in serve tape holding down the fan in the event that a barrier jumps out and smacks his car....lol

loop
looks pretty cool but I would try to move the fan about 10mm away from the motor the magnetic field from the rotor will slow the fan down
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Old 10-09-2018, 03:26 PM
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That can be done, thanks.
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Old 10-09-2018, 04:47 PM
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Originally Posted by Marcos.J View Post

Yokomo and yes they do also putting the axle spacer in Between the axle bearings helps a lot
Which axle spacer do you use? There's a lot of slop around the bearings.
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Old 10-09-2018, 06:18 PM
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I used these in between the bearings they are a Schumacher part number U2153
Originally Posted by gigaplex View Post
Which axle spacer do you use? There's a lot of slop around the bearings.
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Old 10-09-2018, 06:30 PM
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Originally Posted by Marcos.J View Post


I used these in between the bearings they are a Schumacher part number U2153
Spacers and Pins - pin drive - SST (4 sets) # U2153 from Schumacher RC Racing.
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Old 10-09-2018, 06:43 PM
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These might work....


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Old 10-09-2018, 06:46 PM
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Originally Posted by JC3 View Post
These might work....


prety sure they are the same size , i just happened to have extra Schumacher parts from previous kits

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Old 10-09-2018, 08:19 PM
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Originally Posted by Marcos.J View Post


I used these in between the bearings they are a Schumacher part number U2153
What's their thickness? I've got some spare plastic ones from my M07 that might work, though they're about 1.5mm thick and I'd estimate they need to be closer to 2mm thick.
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Old 10-10-2018, 04:40 AM
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Originally Posted by gigaplex View Post
What's their thickness? I've got some spare plastic ones from my M07 that might work, though they're about 1.5mm thick and I'd estimate they need to be closer to 2mm thick.
1.5mm
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Old 10-10-2018, 06:18 PM
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Originally Posted by Marcos.J View Post

looks pretty cool but I would try to move the fan about 10mm away from the motor the magnetic field from the rotor will slow the fan down
Ain't done right if it ain't done twice...
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Old 10-10-2018, 07:14 PM
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Originally Posted by Tractagator View Post
Ain't done right if it ain't done twice...
Thanks for sharing a beautifully machined piece of kit! I've always wondered if people setup their fans as pushers or pullers? if it's a puller, the gap between the fan and motor makes it less effective? as a pusher, the fan is working against underbody air movement, and may still be ineffective?

Wouldn't a fan on an attached heatsink be best? energy transfers to the heatsink which is then cooled by the fan (which is attached to the heatsink)?
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Old 10-10-2018, 07:25 PM
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Originally Posted by foampervert View Post
Thanks for sharing a beautifully machined piece of kit! I've always wondered if people setup their fans as pushers or pullers? if it's a puller, the gap between the fan and motor makes it less effective? as a pusher, the fan is working against underbody air movement, and may still be ineffective?

Wouldn't a fan on an attached heatsink be best? energy transfers to the heatsink which is then cooled by the fan (which is attached to the heatsink)?
Directed airflow is best. EG: pusher. You can't direct "pulled" air, so you're pulling from all directions. Heatsinks are big, and heavy. "some" airflow goes a really long ways. Ducts are best... But not many people run ductwork.

It's also important to to have some kind of duct on even an "open" fan. Fan air reingestion is amazingly effective at re-ingesting hot air.
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Old 10-12-2018, 05:30 PM
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Originally Posted by Nerobro View Post
Directed airflow is best. EG: pusher. You can't direct "pulled" air, so you're pulling from all directions. Heatsinks are big, and heavy. "some" airflow goes a really long ways. Ducts are best... But not many people run ductwork.

It's also important to to have some kind of duct on even an "open" fan. Fan air reingestion is amazingly effective at re-ingesting hot air.
Hmmm, that kinda means that the 3d printed ducting you see a lot works much better then an open fan in Pusher configuration, even if it's against natural airflow? What about a ducted puller fan? The fan won't be working against airflow, and won't be recirculating heated air either, right?
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Old 10-12-2018, 11:23 PM
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There's not so much "flow" under the body of a r/c car. *shrugs* grab a thermocouple, do testing. :-)
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Old 10-31-2018, 04:12 AM
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Originally Posted by JC3 View Post
These might work....


I got a few packs of these cheap (clearance at rcMart) and they fit perfectly [FYI - they're 2mm thick]. The 1.5mm ones from my M07 were too thin.
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