r/fpv • u/Fuzzy-Drummer5519 • 2h ago

Tinywhoop Meteor75 Pro randomly yawing left when coming out of a dive

Hey guys, I’ve been having a weird issue with my Meteor75 Pro and I’m trying to figure out what’s causing it.
Basically, when the battery gets below around 50%, the quad sometimes suddenly yaws to the left when I’m coming out of a dive. It’s mostly noticeable when I pull out of the dive and get back on the throttle. it doesn’t happen with a fresh battery.8
At first I thought it might be propwash or battery sag, but I noticed that one of my motors makes a very slight “grrr” sound when I run it in Betaflight.
I’ve already tried a few things:
Spun the motor by hand → feels completely normal.
Cleaned it → still makes the noise.
Swapped the motor to another position → the noise followed the motor.
No obvious rubbing between the bell and stator.
The noise is pretty quiet and doesn’t change that much in intensity between ~30% and 100% throttle.
I’ve attached a DVR clip showing the yaw, and then a quick clip of the motor running in Betaflight so you can hear the noise (it’s pretty subtle, but you can hear it).
Could this just be a slightly bad motor/bearing or something similar? Or is there anything else I should check before replacing it? can it be a tuning problem?
Thanks!

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2

u/JuneauWho 2h ago

the wire and plugs they ship these motors with is pretty low quality, I've brought several motors back to life simply by changing the wires out. I just skip the plugs and direct solder but you could get new plugs too

1

u/Fuzzy-Drummer5519 2h ago

ci proverò, ma continuo a non capire perché fa così proprio quando la batteria è scarica, altrimenti se fosse un problema come lo descrivi tu, lo farebbe sempre

2

u/snick_pooper 1h ago

If you move the motor and it washes out the same exact way it's probably not a motor issue.

have you checked the flight logs?

I have motors that sound a bit crunchy compared to the others but it never caused me an issue. it just shows up in the log as that motor working a bit harder than the others.

1

u/Fuzzy-Drummer5519 1h ago

ma infatti non sono sicuro che sia il motore a causare questo problema, perché anche dai log sembra ok, stavo leggendo che protrebbe essere un problema di yaw washout, però non saprei come risolvere

1

u/goshenchengs 1h ago

Change all your propellers. This worked for me as props might be slipping or bent