You can activate the view of an avatar with CTRL + F8.
You navigate with left mousekey pressed and W, S
Return to the planes position with R
Return to normal view with 1 and then P
Thank you Tom!
Yes, I know this function, and I have no VR, only "old school" TrackIR . But, honestly, for me its not the same in comparison to a decent third person mode like in P3D. It's so immersive - alike walking myself surrounded by beautiful scenery....