perportionaly, our engines with 3 -4 blades are = to the wwII fighters, their engines turned faster thus the larger circumference was cleared at the same ratio as the smaler one on our slower models. i only use a 3 blade cuz i got a big engine on a little plane and need the clearance, dont apreciate grinding the extra inch of the 2 blade against the ground as the engin turns over.

if you feel im wrong explain why you feel this way.

this is my reasoning simplified to show the processes running through my head.

note also that the longer a blade is the faster the tips move.

oh and i forgot to / by 3 but that doesent matter since they both had to be / by 3 so well just compare c instead of c/3 ok?

and even if everything isnt nice neat doubles in real life the advantage or disadvantage is so slim it really doesent matter. i personaly feel 3 blades are more stable when spining, but do cause mroe drag and do lower rpm and total speed as a result of both and the are heavier but this all breaks down to personaly oppinions and the fact that for what we use them for its not going to matter if you use a 2-3-4- or 35 blade prop. (well 35 may be pushing it?) also real planes have no impact here if they did we could also compaire weight [sm=wink.gif] and i no we dont want to go there. (unless you want to fly an aluminum brick off the runway.) also keep in mind the great difference in HP and tourque. the corsair could turn a much steeper blade too. no to mention were compairing compleatly differnet types of drive systems, multi cylinder 4 stroke with out put put half burning gas spewers.