Dual-motor tailsitters

Hi to all!

I am trying to configure a tailsitter with a Pixhawk px4.

I am using, as SERVO_FUNCTION for motors, values 73 and 74
And for elevons, values 77 and 78.

I am having troubles, when I try to use the mode QHOVER o QSTABILICE, when I move the sticker of my rc, like a 3 - 5 %, in the elevons, it moves all the way through (100% of the movement allowed for the elevon)

But when i put any wing mode (like FBWA, Stabilice o Manual) it moves correctly, I mean, for a difference of 40% in the RC, the elevon moves a 40%.

I have read that some of you are using SERVO_FUNCTION values of 4 and 19. Could this solve the problem?

Or it could be a problem of not configuring correctly the value of Q_A_RAT_PIT_P? Now it has the default value.

We tried to fly it one time, and in Q mode it is very unstable (we wouldn’t be able to change to Wing mode and later we saw the problem with the difference between the RC and the movement of the elevons.

(sorry about my English, it’s not my native language)