Tail wagging up and down

I've just started flight testing my plane, and from straight and level flight I switch on stabilise and found that it maintained straight an level however the tail started quickly wagging like a dog's tail except up and down any about 5 degrees up and down.


Switch back to manual mode again.


Should I decrease pitch P or increase pitch D?

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  • In general, tune out oscillations on PID governors by reducing P gain.

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