I actually was going to post up this one, but I guess it wasn't necessary. While the narrator does get a few things wrong such as pronouncing NACA as "Naka" (it was, far as I know, always pronounced 'en' 'ay' 'see' 'ay'), and I wouldn't be surprised if the wing design from the P-35 to P-47 had numerous changes (thickness being the most obvious), it is quite fascinating in terms dive-performance.
I am interested whether the listed dive-speed figures were with or without dive-recovery flaps. The ability to dive at 0.78 to 0.82 is pretty impressive.