Why still no dive acceleration difference?

[Crumpp]

I just want to remind that 4-blade propeller fighter aircraft were used before WW2, so perhaps it is not really something as revolutionary as we may think?

Yeah I don't understand the fixation on 4 blades. It is not some magical performance enhancement or brand new technology. For some reason, people like to think that because some of the late war allied fighters went to a 4 bladed propeller that there was something wrong or obselete about a 3 bladed propeller.

You are making a tradeoff between power absorbtion and efficiency. It does not make any difference if you load more power but lose efficiency to convert it to thrust. It also does not make any difference if you increase power absorbtion by adding a fourth blade or widening the chord of the existing three.

WWII really reached the limits of piston engine technology and there is not much to choose or accurately depict in propeller designs. There is a reason n=.85 is valid.