Sport lolfirst off these are full scale planes and this forum is about model airplanes.
Second you’re still off base with your statements. Once you reach a certainlevel of HP/torque a two blade prop will not work. You run into tip speedissues. Hence the reason for more blades and even wider blades. You are partlycorrect in that you need to reduce diameter some and increase pitch to gofaster but adding another blade will draw even more power from the engine. Thiswill lower the max rpm that engine will swing that prop and then will be slowerthan the two blade set up.
Also comparing a jet engine fan to an engine driven propeller is just wrong. That’slike saying a tomatoes tastes the same as an orange since they are both fruits.
I am not trying to mean or argue to much but you should do more research on propellers and make sure your research is from a legitimate source.
Again full scale "real" airplanes use mor than two bladed props to cut noise and asorb the HP the engine puts to the prop with out exceeding high mach numbers at the tips. The C-130 models b-I models have engines that make around 10,000 shaft HP what size two blade prop would that need? It would be so large that it would have to spin at less than 800 rpm. So more blades were designed to use that HP.
Anyway sport please do some research.
BLW yeah I am not trying to argue either just rhetoric.
Sport I am in the Air Foce so I know how a jet engine works and I have my A&P.