This is not true. Check out any angle of attack / lift coefficient diagram for instance here's one with a cesna and british jetArcsrule wrote:the foil must generate lift. a doubt 'flat' will generate enough lift to make you smile. i'm not an engineer but i have slept in a Holiday Inn Express.
I assume the difference is about 15kn difference in top endTiago1973 wrote:i wonder if in practical terms there is tons of a difference between a crude airfoil shape and a flat plate
Not "tons". But enough that the only airplanes that have symmetric airfoils are supersonic airplanes and stunt planes. Then there are boat props, airplane props, helicopter propellers, some are symmetric some not, depending.Tiago1973 wrote:i wonder if in practical terms there is tons of a difference between a crude airfoil shape and a flat plate
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