I desoldered the motor completely from the ESC and soldered it onto another ESC.

Then I completely removed the ESCs, with motors still attached, from the power distribution board. Then i soldered it back on from positions [2]->[4] and [4]->[2] ie. swapped them around.

Quote: I'm really not knocking your soldering skills, honest! But if you didn't unsolder and resolder something in the steps above, then I would still be suspicious of solder joints. (I'm pretty skilled as well, and it turned out a bad solder joint is what bit me in the butt.) If you are certain you eliminated that possibility, then maybe you have a bad FC or ESC for sure.

It's fine. No one's perfect and it's possible that it could've been a bad solder

replacement ESCs finally came in and now the thing flies okay.

Ended up crashing it however and the top screw nuts came off the motor and the propellers flew off. Lost one of the nuts which really annoyed me.
What I realised from this is how stupid it is that there's a clockwise and counter clockwise thread standard. 99.99999% of the world uses clockwise threads but half the motors happen to use counter clockwise.
I'm going to imagine that the icing on the cake is that the thread is imperial instead of metric as well.

Having XT-60 and deans connector types for batteries was annoying enough.

I think next time I'll just fasten it to like 3Nm torque and see if it strips the threads.

You can use motors with normal threads and btw they are M5 nuts (You feel lucky, right? ). I prefer to have both CW and CCW motors on my quad because the locknut tends to loose it's "locking capabilities" after it has been taken on/off a couple of times with the result of them loosening mid flight. You can also get CW and CCW lock nuts from all kinds of different vendors like banggood, RMRC, ebay, aliexpress etc

technically i should be able to use 4 CW motors and just swap 2 of the phases on opposite motors and they'll function the same right?

Locknuts are a great idea. I might get some, but they are supposed to be one-use only because the plastic inside deforms to fit around the thread. I ended up putting a star and spring washer on the motor so hopefully it holds up.
Still need to find some CCW threaded nuts however.

swapping 1 cable from motors is exactly how you make cw a CCW...
or if you are lazy you can go into the blheli suite and change direction there

Good. Next time I buy spare motors, I'm just getting CW lol

(21-Sep-2016, 09:49 AM)tecnix Wrote: Good. Next time I buy spare motors, I'm just getting CW lol

Remember to check thread VS motor rotation. CCW motors are CW threaded. EDIT: it's a naming convention - some manufacturers call a motor CCW by rotation, some by thread direction.

For lock nuts, get some of those http://www.hobbyking.com/hobbyking/store..._CCW_.html

Alu lock nuts in low profile and normal profile sizes:

http://www.readymaderc.com/store/index.p...th=534_543

I really can't stand hobby king. $8 shipping for the 8 nuts. I could stuff them into an envelope and mail it for $1 myself.
Ordered some off banggood for 2/3 the price and free shipping halfway across the world in china.

Thanks for pointing out the naming convention and what nut to look for though