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Old 10-13-2003, 04:49 AM   #1
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Default Brushless Motor

i'm thinking about gettin into off-road cars. just wanted to know if it is safe to run a brushless motor on a buggy/stadium truck? wont it cease if dirt/dust gets in the motor? is it possible for dust to enter the motor?
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Old 10-13-2003, 05:34 AM   #2
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They are sealed.
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Old 10-13-2003, 03:11 PM   #3
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Its safe,b ut i've seen a bunch of novak brushless systems with the shaft slipping and then you have to send it in.
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Old 10-13-2003, 03:36 PM   #4
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what do you mean when you say the shaft is slipping?
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Old 10-13-2003, 06:43 PM   #5
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Do you mean the magnets are coming loose?
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Old 10-13-2003, 08:05 PM   #6
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in the novak brushless, the magnet is on the shaft in the center and the windings are around the inside of the can. after about 15 runs the magnet will move on the shaft. i've seen about 4-5 of them personaly, but heard of a bunch more from guys at the local hobby shops and tracks. i have one but havent ran it that much yet, so it hasnt happened to me yet.
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Old 10-14-2003, 02:02 AM   #7
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Default Re: Brushless Motor

Quote:
Originally posted by S-T-R-l-K-E-R
i'm thinking about gettin into off-road cars. just wanted to know if it is safe to run a brushless motor on a buggy/stadium truck? wont it cease if dirt/dust gets in the motor? is it possible for dust to enter the motor?
One of the guys in the track had 2 brushless otors and now they are all busted. I guess no matter how sealed they are, moisture still gets in, though they are known to be maintenance free, I don't know what are the extremes but I guess it's cheaper to run a stock motor coz with the brushless, it's still too powerful for the track.
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Old 10-14-2003, 02:54 AM   #8
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Simple fix for the slipping shaft is to put a drop of thin CA on either end of the magnet where it meets the shaft. No problems since I did that.
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Old 10-14-2003, 04:11 AM   #9
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Hey Fatboy Joe! you ran a great race this past Sunday! Actually, the 2 Novak Brushless Motors that I used for Off-Road are fine. No dirt, dust, or moisture in either of the cans. The problem seems to be with the ESCs. After giving Charlie (head technician at Novak) a detailed description of conditions at the track and the "symptoms" currently ocurring, his assessment is that it's either a lost sensor or a damaged harness (which are part of the connections between the ESC and motor) that are causing the problem. It's possible that these may have tripped during the system's Thermal Shut-Down which actually protects the motor, ESC, and battery from serious damage caused by overheating. The motors work except for a glitch with the throttle. Since both are still under warranty, I don't dare open up the ESC to try and figure it out. Fortunately for me, these are Novak products and I know that when it comes to Customer Service, they are 2nd to none. I still love and will continue using Novak Brushless Motors Systems in most of my active off-road buggies. Once you have a taste of 20 minute run times, you just can't go back (though since I still have some brushed motors, I will definitely still make use of them). In the end I will make whatever necessary gearing changes that are needed and keep a better eye on the temprature of the ESC's heatsink. According to Charlie, normal operating temps are in the 160 F range. That is about 3-5 seconds of "Thumb Time" after a good hard run. My ESC's heatsinks would get noticeably hotter but would cool off quickly. Anyway, hope this helps explain things for other Novak Brushless users out there!

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