unstable quad, need help, gonna use it for a school project soon.

august300

New Member
Hi everyone!
Recently I've bought new propellers for my 450 homebuild quad, 11x5 e-prop to be exact, they might be a little too big, but I'm not sure.
Before i was flying with 10x4.5 slow fly prop, and it flew just fine, no wobbles, vibrations or anything, but as I replaced my old prop with my new and, bigger ones, it was really really wobbly.
So I tried lower the P gain, but the lower I got, the bigger oscillations I would get, sometimes so big that I couldn't control it.
It should be said that the P was the only setting I changed, also this is my first build.
My first though was, that I might have to raise the P gain, but the higher I got the more twitchy it became, also I couldn't get it to hold a certain altitude.

Setup:
-dji f450 frame clone
-Ntm prop drive (900kv)
-Turningy plush Esc (30A)
-Gemfan composite e-style 11x5 prop
-Kk 2.1.5 flight controller
-Turningy 11.1v 3s 25-35c 2200mah
 

PeteDee

Mr take no prisoners!
Sounds like they are too big, 900kv NTM's would be okay on 10x4.5 on 3S or better on 9x5 on 4S.
 



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