Hi. My apologies but Im brand new to this sim..

Every aircraft is unstable...rocking back and forth and dropping up and down...hand flying or autopilot...default and add on aircraft...I have realism set to fsx, but all other setting make no difference anyway.

Im sure there is an easy explanation!

I think you provided the answer in your opening statement.  The legacy flight model setting  have never really worked well in the sim.  Use the modern setting and all should be much better for you..

And make sure that you adjust the sensitivity of each axis of your joystick. If they're too sensitive, you'll be all over the place.

Just checking... Do you know how to trim the airplane for level flight?

Edited March 1, 20233 yr by MDFlier

yes it was the legacy setting!...thank you.

But the planes still rise up and down in external camera view...I dont think the plane is actually moving, as the vsi is stable ...I think the camera is shifting?...is there a solution for this as well?

thanks again.