[1morehobby]

I have a ZMR250 with Tiger Air200 and DAL props running 3S . It flies great very responsive and good acros. The only thing I have not been able to correct is a constant rear pitch drift, I constantly have to give it forward pitch, this is even indoors high enough to not have ground effect.The FC is hard mounted on the frame, I have calibrated the giros , ESCs and gone thru the set up several times. The CG is perfect, props are balanced and vibrations are nil. Don't know what to try next. By the way it is on OP 15.2.2 I should maybe try LibrePilot don't know if that would fix anything.

Thanks in advance

[TheOtherCliff]

assuming you are flying attitude or rattitude
increase "gcs -> configuration -> attitude -> settings -> rotate virtual -> pitch" a few degrees

[1morehobby]

Thanks Cliff, didn't think of that. I will try it.