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Do you mean these are just to get an idea of general trends?
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Yes
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It seems that allied believed in wwii that 4 or 5 blade propellers are better than 3-blade when speed is high(>700km/h?).
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Power absorbtion is what they were going for....
3000 hp engines where the next step on the horizon.
Large amounts of effort for little gain in a 3000 hp piston engine aircraft.
Jets eclipsed any further piston engined development.