I was flying my whoop with 0802 brushless motor. Suddenly felt lack of power. Upon Inspection found 1 motor dead.
Checked continuity between each motor wire end and the joint where 3 wires are soldered together, found one wire not beeping.

Removed the coating where wires meeting the bell and found that one wires was broken. So its really not a winding broken but just lead wire broken.
But I am not able to locate the broken lead's other end to solder back. Any ideas?
Pics Attached. 

Thanks

Maybe I'm missing the actual problem but you have a 3 phase motor with 3 wires. Your pictures show two black wires still attached, a black wire that has come off, and a clump of soldered together copper windings. The black wire that has come off just needs to be soldered onto that clump and then re-heatshrinked.

(19-May-2019, 10:45 AM)SnowLeopardFPV Wrote: Maybe I'm missing the actual problem but you have a 3 phase motor with 3 wires. Your pictures show two black wires still attached, a black wire that has come off, and a clump of soldered together copper windings. The black wire that has come off just needs to be soldered onto that clump and then re-heatshrinked.

Really?
But the broken wire has come off from the place where other two wires still attached.
You think, still I should solder it to the clump of soldered wires which is on other side?
Please check below video.

No, you're right. I was missing something. I was surprised to see that exposed soldered winding seemingly just flapping around. That is actually where all 3 phase wires meet at a common junction point. So the copper winding wire for your broken pigtail wire must be embedded somewhere in one of the winding points.

If you remove the sheathing from the broken off black wire, is there any evidence that part of the copper winding snapped off and is still soldered to the end of that wire, or is it just the solder joint itself that failed?

(19-May-2019, 11:20 AM)SnowLeopardFPV Wrote: If you remove the sheathing from the broken off black wire, is there any evidence that part of the copper winding snapped off and is still soldered to the end of that wire, or is it just the solder joint itself that failed?

This is so difficult.
Guess will have to replace motor.
Can I use one motor alone 0603 19000kv?

(19-May-2019, 11:29 AM)sim_tcr Wrote: This is so difficult.
Guess will have to replace motor.
Can I use one motor alone 0603 19000kv?

Probably. But I would only do it as a temporary measure until you can get a new 0803 motor. The FC should be able to handle differences in motors but how well it does it on a micro quad I don't know. The only way to find out is to try it.

If you're interested to see how well an FC can cope, the following video is the sort of thing that can be achieved on a 5" quad with a complete mish-mash of different parts...

I tried 0603 19000kv motor and it flies ok.
Anyway ordered replacement.

I wanted to jump back in on this, I just had the situation where the quad loses its power and draws the batteries down really fast. I thought it was the batteries, but with a new order I realised its gotta be the connections on my quad. So I switched from plugs to direct solder to see if a crimped pin was upset. While I was working that through I grabbed an individual wire from my 0802 and it came loose from the stator hub :X.

I just kinda jammed it back into the hole, and that worked for 1 flight but then I needed to go rework it. I found this thread and removed the "Shrimp" wrap around the base where the wires connect to the motor. There I found a tiny wire, one of the windings looked like they came out and touched that wire that fell out. 

I didnt notice any solder maybe they were just touching  

So I just soldered it up, see image below. Then I tested and its a happy quad again ! 
I am new here and I cant post an image the way I would like, maybe the way I did it worked. But anyway I wanted to show you in the image there are the two remaining happy non-problem wires. And then you can see a winding coming down from the side with the tip connected to the motor wire. 

YAY!