Hello! I am very new in the fpv hobby and completed my build today (it's a bit scuffed but it still works).

I am currently fine tuning the drone and working around with pid tunes in betaflight and also configured my radiomaster zorro to connect to my drone.

Now, when I try to accelerate by going up in the throttle it works fine but at some point when I go back down with the throttle the motors either stay for a little while at a medium throttle and then instantly switch to a lower throttle, resulting in some kind of "click" sound.

The other big thing is that when I accelerate again and try to go back down it gets really loud and it sounds like something is stuck inside the motor itself.
Does anyone know what could cause this? I'd really appreciate your help.

Heres a video in case that helps at all (Especially the last part of the video sounds really bad)
:


Wasnt quite sure if this was the same problem as the pinned thread in this sub forum!!

its not a way we can test a quad, we can only test if the motors does spin or not: everything else does require a real flight situation, it needs props.

the noise you are hearing does sound mechanical, but it might be noise from the motors by wrong commands; a result cause its not made to work without rotors. you can damage esc and motors if you proceed, in the worst case it can give damage to other parts like fc, vtx,.. either.
stop speed them up without rotors by the transmitter.
to stay save as you told you are a beginner, what did you tune? loaded a preset? for a simular build, same voltage and about same weight and power?

double check your motor order, motor spindirection and other settings: take care, get some distance to the quad, stay prepared to disarm; give it a try, happy maiden flight ;-)

it shouldent sound like that with rotors attached, come baack here if so

Hey!

Thanks for the advice, the only thing that I really changed were the PIDs and the rates / filter.

Ive taken it from a tutorial build with equal parts as mine (listed his parts in the description of his tutorial and I used the same ones)

I added a screenshot of the settings in the attachment //didnt work so I uploaded it on prnt.sc:
1 https://prnt.sc/e0heYipBvl4p
2 https://prnt.sc/tiuizH0BF_pV
3 https://prnt.sc/Kt3xG7ch_dCg