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Old 10-03-2011, 03:54 PM   #1
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So recently I bought a Novak Kinetic and ballistic motor. This weekend, I went to run the car and the capacitor blew as soon as I pressed the accelerator. I emailed [email protected] but I haven't heard back from Novak yet, but this afternoon I took the ESC and motor off the car, and I happened to notice something odd about the motor. It didn't seem to have any magnetic resistance when turning the rotor. Odd I thought, so I took the front piece off and saw that the 4 magnets had broken off the rotor, 1 of the magnets is actually broken into 2 or 3 pieces inside the stator. What a nightmare this is. I didn't overheat the motor or ESC, the trans-cap module was installed incorrectly by the factory, but it hasn't been wrecked or dropped. What the heck is going on? I know I should have paid more attention but the last time I ran it, I thought the battery just went low. I just figured the low voltage cut-off had come and I picked it up, turned it off, and put it away. Now I'm thinking the rotor broke and that added to the capacitors failure. I'm using a 7.4v LiPo. I'm running stock timing and I keep close eyes on the motor temps, they were never outside of the safe ranges. Please opinions. It seems like I'm going to have to make a warranty claim.

Edit: Well when I first looked at it, it looked like it was 4 magnets. When I looked closer, it turns out its just one continuous magnet broken into about 4 pieces.
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Last edited by pensfan2987; 10-03-2011 at 04:14 PM.
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Old 10-03-2011, 04:26 PM   #2
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Were you revving it up on the work bench or doing crazy donuts or something? I know you can explode rotors by free revving them without a load. If not, I'd say rotor failure. Novak real good about honoring their stuff.
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Old 10-03-2011, 04:30 PM   #3
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No, I didn't free rev the motor or anything, it has just been normal driving, practice laps on the track. At this point, I can see damage inside the stator core and the windings. The whole motor will have to be replaced along with the trans-cap.

Last edited by pensfan2987; 10-03-2011 at 04:33 PM. Reason: more to say
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Old 10-09-2011, 03:53 PM   #4
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Pretty sure when Charlie gets back from the IIC you'll get a response.

BTW the rotor in any brand of motor has the potential to explode under no load and big rpm, I've seen it happen in TC, just rolling over in a high speed sweeper corner.
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Old 10-09-2011, 10:03 PM   #5
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I have also seen rotors demagnetize from heat as well as what the others said. Either way you will be set in a few days! Charlie is a super nice guy, and will understand your issue! Just patience for now!
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