UPDATE:

I have found this issue is caused by fullscreen/VSYNC on. Any other settings and its smooth like normal .

I have what feels like massive script lag sitting in this aircraft on an empty editor in an unmodded game. Very noticable. If you sit in the cargo for example,and use freelook,and look around,its like a slide show. With vsync OFF this is less noticable,with Vsync on its extremely easy to detect with the naked eye. Its either script lag or some extrmely unoptimised textures or polygons if i had to guess.

MY SPECS: I7-13700 / 32GB Corsair vengence RAM at 3200 Mhz . 3060ti / SSD