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Old 04-01-2009, 01:41 PM   #1
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Default Rotor size descrepancy in 13.5 BL Motors

Hi Guys
I have 2 Prince 13.5 BL Motors and one has a 12.5 rotor and the other has a 12.25 rotor(as does a mate of mine), they perform totally different to each other, and the magnets are of different strength, has any body out there found this to be the same with their motors. On the Team Wave website they state that the rotor in the 13.5 BL Motor is 12.5 when actually its only 12.23 on another mate of mines motor.
Could someone help in my plight of trying to find out about why there is the difference in rotors on the 13.5 BL motors. The below BL Motors seem to be from the same factory, but with different labels on. Can new rotors be bought for the below BL Motors?
Speed Passion
Team Wave
Prince Roch


Cheers Malc
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Old 04-01-2009, 03:46 PM   #2
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Oh its not just in 13.5 motors that there are rotor discrepencies.
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Old 04-01-2009, 04:11 PM   #3
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Oh its not just in 13.5 motors that there are rotor discrepencies.
well actually I have a Prince 10.5 that has a 12.25 rotor as well
Malc
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Old 04-01-2009, 04:39 PM   #4
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Well I run a Novak 13.5ss which is standard and fitted with a 12.30mm rotor. I'm interested in the up-grade 13mm rotor and what benifits this could give?
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Old 04-02-2009, 02:56 PM   #5
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Make of it what you will, but Tekin have optional rotors available for extra torque...

TT2276 12.5mm Redline BL Torque Rotor
TT2277 13.0mm Redline BL Torque Rotor

But maybe I am throwing this off topic, just thought i'd throw some info out there, maybe it has some use to discuss the benefit of a smaller or bigger rotor...

I have the standard 13.5 sensored redline and it hauls plenty of torque/speed already. I can easily keep up with other brands down the straight with full boost on a 10mx15m carpet track... oodles of torque.
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Old 04-02-2009, 03:09 PM   #6
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Quote:
Originally Posted by part-time racer View Post
Well I run a Novak 13.5ss which is standard and fitted with a 12.30mm rotor. I'm interested in the up-grade 13mm rotor and what benifits this could give?
bigger rotor more torque less RPM
smaller rotor less torque more rpm
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Old 04-02-2009, 03:12 PM   #7
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It really depends on whose rules you run under, a 17.5 ROAR legal has certain rotor specs, but that doesn't mean they don't get changed out at the club level. Same for some of the 13.5 spec motors, but when nothing is teched and a simple look for a tag, like the old days, means there could be quite a bit of rotor changing going on.

Although you can have variables such as outside diameter of the rotor, there are other things that can also change the characteristics of your motor. The actual inner shaft diameter will determine the thickness of you rotor, which again will effect perfomance. Another lesser explored variable is the actual length of the rotor as well, but thats another can of worms. Orion offers a rotor tuning kit with 4 different rotors to tune your brushless mod motor with, but there is nothing stopping you from using that in a other application.
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