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Old 12-03-2012, 05:58 AM   #3001
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Well according to the rules "No modifications or optional parts allowed on motor can, endbell, stator, or rotor." Is the aluminum heat sink considered an optional part? Seems the rules are a bit vague regarding the heat sink. I would like to know the official rule on this because I'm looking to buy a cooling fan soon.
I think it would be best to not allow anything that attaches to the motor. On some chassis, fitting a clip-on heatsink is nearly impossible. It would be in the spirit of the class to not put these chassis at a further disadvantage than they might already have.
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Old 12-03-2012, 07:15 AM   #3002
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Is this really an issue. No fans that replace the ring has been a rule for a long time. Clips, clamps, chassis mounts, etc... All should be allowed. If you are wanting a no fan rule cause you can't fit one on your motor, you are not looking hard enough.
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Old 12-03-2012, 07:29 AM   #3003
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I would like to USVTA allow us to use non Novak motors . Is Novak afraid that they can't compete with other motor manufacturers ?
Ummm... the whole point is that it is not supposed to BE a motor competition...
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Old 12-03-2012, 09:23 AM   #3004
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so is my LRP fan illegal?...this is what Im using on my TC6...and the other on my TC4
http://www.teamassociated.com/lrp/pa...ails/LRP82520/
http://www.teamassociated.com/parts/details/31037/
Well according to the rules "No modifications or optional parts allowed on motor can, endbell, stator, or rotor." Is the aluminum heat sink considered an optional part? Seems the rules are a bit vague regarding the heat sink. I would like to know the official rule on this because I'm looking to buy a cooling fan soon.
IMO, as long as the cooling fan does not require you to disassemble the motor to add it on (i.e. the fan does not bolt onto the motor) then it can be used. The chassis-mounted fan kits make no physical contact with the motor and they work great in our VTA races. The USVTA rules need to be more specific about whether the clip-on, bolt-on, or wrap-around heat sinks and cooling fan kits are allowed.
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Old 12-03-2012, 09:43 AM   #3005
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very interesting thoughts on motor fan ect....

1. no contact with motor

2. any add on as long as the ring isnt removed

3. no fans or heatsinks

which makes more sense

I vote #2
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Old 12-03-2012, 09:59 AM   #3006
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I'd agree with #2. I see this more of a maintenance item than a performance booster. I don't change my gearing because I'm running a cooler.... I'm just hoping it makes my motor last longer and therefore makes racing cheaper for me. I'm running this one... http://www.integy.com/st_prod.html?p...8#.ULzaBu8xZ_Y
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Old 12-03-2012, 10:46 AM   #3007
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#2 here as well.
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Old 12-03-2012, 10:54 AM   #3008
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#1 for me.
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Old 12-03-2012, 11:09 AM   #3009
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# 1 for me but i could see # 2 not being a problem
IM using chassie mounted fans on all my cars with no heatsinks but i have them and they just got in the way so i took them out
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Old 12-03-2012, 11:25 AM   #3010
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To misquote "You'll have to pry my heatsink from my cold motor ..."

A good heatsink is much more effective and cheaper than a fan. #1 will just make fans more vulnerable and prone to breakage, especially for those with less than perfect driving skills.

So, #2 would be my first choice and #3 is better than #1.
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Old 12-03-2012, 11:40 AM   #3011
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Apparently I'm missing something here as in not digging deep enough into the gray areas of the rulebook. How hot are you folks getting these motors that a fan is really needed?

Weekend before last I ran several back to back practices (200+ laps) overnight at Minnreg of 40-45 laps each with 40 on the timing, 3.84 ratio, car was overweight and the driver was certainly not as smooth on the throttle as you guys likely are. First run came off at 128 and the rest were in the mid 130 range.
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Old 12-03-2012, 12:23 PM   #3012
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Yes, but some people's car get hot climbing up this mole hill!

Ditto on the heat, I don't think my car has seen much over 115*F. We do run a pretty high FDR though.
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Old 12-03-2012, 12:40 PM   #3013
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2 .. 1 ... no wait 17 !!

My fan is mounted 3/8" behind the motor with servo tape on the chassis, works just fine.
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Old 12-03-2012, 01:15 PM   #3014
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Originally Posted by Geno-Machino View Post
Apparently I'm missing something here as in not digging deep enough into the gray areas of the rulebook. How hot are you folks getting these motors that a fan is really needed?

Weekend before last I ran several back to back practices (200+ laps) overnight at Minnreg of 40-45 laps each with 40 on the timing, 3.84 ratio, car was overweight and the driver was certainly not as smooth on the throttle as you guys likely are. First run came off at 128 and the rest were in the mid 130 range.
I have my car setup very similiar to your and I'm coming off at 145-150 range after the main. Similiar kind of running (practice, multiple batts back to back) and it comes off in the same range consistently.

Personally I hate fans and for the setups that everyone is running (motor timing only) there should be no reason minus improper gearing or significant problems with you car. I ran a Xray T1 for over a year with the front belt rubbing a groove in the lipo case and even then it came off around 160-165.

I can see the TC/1-12 guys NEEDING a fan on the motor and/or esc but on VTA? I'd put it right up there with ceramic bearings.
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Old 12-03-2012, 01:15 PM   #3015
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Quote:
Originally Posted by Geno-Machino View Post
Apparently I'm missing something here as in not digging deep enough into the gray areas of the rulebook. How hot are you folks getting these motors that a fan is really needed?

Weekend before last I ran several back to back practices (200+ laps) overnight at Minnreg of 40-45 laps each with 40 on the timing, 3.84 ratio, car was overweight and the driver was certainly not as smooth on the throttle as you guys likely are. First run came off at 128 and the rest were in the mid 130 range.
I do not use a fan or heatsink of any kind, carpet or asphalt. The only time I have been over 140 was a few years ago at the Classic chasing Quinton Robbins.

The reason the LRP unit was quickly "banned" if I remember correctly, was to follow ROAR's decision to limit fan size to 30x30 and a miximum of (2) fans. The esc fan counting as (1). Both the Novak and LRP ae also "rigidly mounted" to the motor. Which some could argue, is acting like a full time "peltier"(sp) (yes, I know, there is no "powered" heat source)
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