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Century Radikal E640 - Swift 16 NX
› Swift NX motor problems
06-01-2012 12:48 AM  6 years agoPost 1
wmueller10

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Ft Benning Area

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Hello,
I recently bought a Swift NX kit that came with a Century 550 1300kv motor. I've flown it about ten times so far with no major problems. Doing a routine inspection of the craft, I noticed the top of the main drive gear is being chewed up by the pinion gear. Also noticed that the armature of the outrunner motor can slide (move) in it's housing as much as a 1/4 of an inch. I have not noticed this before,, is it normal? Did I over heat this motor and damage it? Any advise would be appreciated. Thanks

Blade size 550mm. Pinion gear 10 tooth Battery 4s 4000mah

Willi

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06-01-2012 02:20 PM  6 years agoPost 2
beavis1

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New York state

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No you have not damaged the motor they are like this. A regular airplane prop holds the can down as it is pulling when it is used in a plane. In the heli the can will usually not ride up but it can. It usually happens after a little time on the main gear and once it starts it continues to do it.

I had this happen before also and what I did is just put a little K&S brass or aluminum tubing above the pinon gear on the shaft to prevent the can from riding up. Just make it the same size as the visible shaft over the pinion. The tubing rides on the BB race so there is no friction and captures the bell so it can not raise the pinion. I tried a wheel collar before but this rubs the base and although works creats a lot of unwanted friction.

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06-01-2012 11:13 PM  6 years agoPost 3
wmueller10

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Ft Benning Area

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Ok I can machine a spacer in no time. I'll leave about a 32nd play between the bearing and pinion,, good to know that I don't need to buy another motor.

Thanks Willi

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