HELP! Syma X5C-1 Rotor Issue

[TitaniumSparrow]

Was flying around indoors, and was goofing off for the kids. The quad took a couple spills but nothing bad. Was making lots of shifts in direction, high speed mode etc.

My daughter jumped up and snagged the landing skid, (despite my warnings not to get close to the quad when in operation...) and it flipped and hit the floor.

One of the rotors wouldn't turn well shortly after that. (there was physical resistance when rotating the prop by hand) Looked at it and there was some charred looking material near the main gear (see Pic1 and Pic2)

I pulled out my spare quad and cannibalized a motor mount, and a motor, soldered it all up and voila! The quad would fly. I noticed it was favoring that replaced motor however, so i flew for a bit and it eventually dropped. On inspection I noted the same problem, with the same dark material.

What on EARTH is going on? Visual inspection of the motor shows nothing wrong, so it does not appear to be a burned up motor?

 

[Chuck]

Was flying around indoors, and was goofing off for the kids. The quad took a couple spills but nothing bad. Was making lots of shifts in direction, high speed mode etc.

My daughter jumped up and snagged the landing skid, (despite my warnings not to get close to the quad when in operation...) and it flipped and hit the floor.

One of the rotors wouldn't turn well shortly after that. (there was physical resistance when rotating the prop by hand) Looked at it and there was some charred looking material near the main gear (see Pic1 and Pic2)

I pulled out my spare quad and cannibalized a motor mount, and a motor, soldered it all up and voila! The quad would fly. I noticed it was favoring that replaced motor however, so i flew for a bit and it eventually dropped. On inspection I noted the same problem, with the same dark material.

What on EARTH is going on? Visual inspection of the motor shows nothing wrong, so it does not appear to be a burned up motor?

It sounds on face value like there is something shorting out internally, and not necessarily the motors themselves, but in the circuitry connecting to them. I would suggest you try making the necessary repairs, but not fully reassembling the quad. Leave the props and upper body off whilevyou power itbup, so that you can see everything inside. If you see smoke, shut it down, and investigate further at the source of the smoke. It the original motor you removed wasn't physically damaged, it may not have been the source of your problem, but the cause. If it resulted in something else overheating, after the crash. IE: Power applied to a motor restricted from rotating normally.

 

[Mike H.]

Whenever you crash these toy quads it upsets the gyros on them and can cause poor flight characteristic and just not work properly...I would first recalibrate the gyros on as flat a surface as you can find..This should fix the problem...If for any reason it doesnt then i would consider replacing the entire motor holder assembly first and the PCB board as a last resort...My guess is the calibration will fix the issue...Let us know what happens.