Advanced Tight spinning motor a problem ?

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I just received my phantom three advance today. I put all the propellers on and did the necessary calibrations and everything looks good I haven't taken my first flight yet. I did notice that three of the motors spin quite freely by hand , all three the same . The other one still spins but not as easy as the other three is this something to be concerned about before my first flight
 

N017RW

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The only moving parts in the motor are bearings. So unless it's rubbing against the shell opening there's not likely any problem.

Manufacturing differences in the magnets may make it feel a bit stiffer but that would not be a problem so long as you don't sense any grinding type friction.

The best way to tell if you have any issues is to fly and check motor temps afterward.
 
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Thank you, are you saying motor temperature being hot to the touch or is there another way to test the temperature
 

N017RW

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Yea, to the touch. Should never be too hot to touch.

If you have other means to measure temp. then OK too.
 
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