Hello,

After a crash my quad fall of the sky when doing small throttle move.

I was thinking of a esc desyn but the same thing append when rpm filter is disable in betaflight 4.0. 

Thank you for your help

rpmfilter hasnt a special relation to desync, it wont solve anything and it might not be the source either.

it sounds like a motor, esc or power supply issue.


does it fall over the same axies all the time?
if yess, switch two motors - if it changes the axies its the motor if not it might be the esc


if it is various, check the condensator, power lead..

(28-Aug-2023, 04:38 PM)hugnosed_bat Wrote: rpmfilter hasnt a special relation to desync, it wont solve anything and it might not be the source either.

it sounds like a motor, esc or power supply issue.


does it fall over the same axies all the time?
if yess, switch two motors - if it changes the axies its the motor if not it might be the esc


if it is various, check the condensator, power lead..

It is various, i changed xt60, condensator, redo the upload of betaflight 4.4.0 with default settings, re-flash bluedjay with default settings. but it doesn't change anything   .
In the log i see a voltage drop just before.
I don't know what to check. Is it a bad ESC ? or it can a be a bad motor ?

actual bluejay has some issues, step back to the previous version go sort that out as issue

https://intofpv.com/t-don%E2%80%99t-use-bluejay-v0-20



check the frame stiffness, any arm less rigid?
anything moving?
connection well between esc and fc?

can you provide a dvr?

(31-Aug-2023, 10:13 PM)hugnosed_bat Wrote: actual bluejay has some issues, step back to the previous version go sort that out as issue

https://intofpv.com/t-don%E2%80%99t-use-bluejay-v0-20



check the frame stiffness, any arm less rigid?
anything moving?
connection well between esc and fc?

can you provide a dvr?

Yes i'm using blujay v0.19.2
I check the frame and every thing is ok, nothing is moving. 
I don't have connection between esc and fc beacause i have an AIO.
Video : https://www.transfernow.net/dl/20230901n...X/ZCRhwVoN

that doesnt look like a desync issue, it would freakout and do a few flips.
an dvr with osd could maybe help, was it maybe a ruanawayprotection feature?

what aio, motors and battery do you use?

(03-Sep-2023, 12:08 PM)hugnosed_bat Wrote: that doesnt look like a desync issue, it would freakout and do a few flips.
an dvr with osd could maybe help, was it maybe a ruanawayprotection feature?

what aio, motors and battery do you use?

I will post a DVR. 
It happens every time i increase the throttle quickly. 
How can i know if it is a runaway protection feature?

aio : HAKRC F722 40A AIO
motors: axisflying c204 2910kv
propellers : Gemfan D76-5
battery : CNHL BLACK SERIES - 1300MAH 6S 100C

osd warnings would display: "runaway"

(04-Sep-2023, 09:19 AM)hugnosed_bat Wrote: osd warnings would display: "runaway"

I don't have this warning.
I think i will order a new AIO and try if it fix

it might be one broken fet of two on one esc, but various axies doesnt match that.
hopefully the aio is the issue than

I changed the AIO by the ARGUS F7 AIO, but it's worse. know when i increase the throttle the quad go away on the side. Is it a bad AIO ?

you changed the aio? and got even worse result?
i wasnt able to watch the vid again over the link above