[RedChico]

Here we go, mixing personal opinions and caculated guesses.

Planes do fly with those parameters.

What are needed to fix, if it really needs, are accurate and objective parameters such as:

Radiator flux capacity, air drag of such.
elevators/ailerons/slats/flaps whatever max exerted force, position of such.
Mechanical resistance of a large number of objects in a plane.
Equations for equilibrium, for each plane.
Static stability and control, longitudinal/lateral stability and control.
Compressibility effects.

The list goes on.