Weird twitching when I yaw

[blissful reef]

Hello, I've recently noticed that my drone does some sort of weird move when I yaw at high speeds. I don't know if its a problem with the drone (Its a "quality" eachine 4inch LR drone) or some weird tuning, or anything else. I've got some blackbox logs though its my first time using a blackbox so it might not be prefect, And I *had * some dvr footage but I think I accidentally deleted it and I don't have access for a field for 2 weeks so no dvr it seems.

I have one named blackbox named blf_001 and one named blf_all. They seem to be the same. This is the blf_all

I don't really know what I did in the beginning so skip that. I noticed the weird move on around these timestamps: 00:45, 00:52, 00:58, 01:06, 01:11 and 01:16. (This text was before I found out that I deleted my dvr but I hope the timestamps still work in the blackbox viewer)

[mossy oak]

It looks like the rear right motor is being commanded by the PID controller to slow down significantly, and even stop all together in places. Normally when I see this sort of thing it's because the motor opposite (in this case, front left) is failing to produce adequate thrust

Honestly it's sort of difficult to tell though, without DVR or other video footage. When the motor command and the actual motor output get out of sync in situations like what I've described, you sort of need proof of it outside of the blackbox log

[blissful reef]

Thank you very much for the help. I actually forgot to add that my front left motor is actually a bit bent, so that’s probably the problem. The thing is that I have had this problem for as long as I can remember, and the bent arm has already been replaced once and hasn’t been bad for that long. I’ll try to replace the arm and hope that it works.

[mossy oak]

The motor is bent, or the arm is bent? If the motor is bent... replace that shit

[blissful reef]

I think it’s the arm (left and right front arm)

[knotty harbor]

This build is quite noisy.

There's more even noise in the other axis (roll, pitch) but there's this big one on yaw at the higher throttles.

What is the weird movement? I'm seeing a yaw and a roll, not being tracked perfectly, but I'd like to know what's going on. You are loading the front left motor with the left yaw, the roll right and the pitch down command, so you'll notice it's actually maxing out the motor at a few points, which could be the reason for the weird movement.

I would also recommend making sure the frame is mechanically sound before continuing.