I have looked at the some engine parts of I-16 and I saw less polygons in to the 3D model... So again as in old Il-2 times, if some engine part in 1935 is cylindrical, in BoM this engine part will be as parallelepiped and cuboid...What happens...?

This is so, also for the tail wheel of I-16...
DEAR DEVS: The Devil is in to the Detail!