Quote:
Originally Posted by Crumpp
On what data???
There is a good reason why n = .85 in a CSP is a valid assumption in subsonic aerodynamics.
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P47's 3-blade prop drops to 63% efficiency when diving to 0.7 Mach which is subsonic. When you have 20% efficiency advantage over your opponent, you have 400 extra Horse Power, that's a Huge difference.
To model detailed prop efficiency by softwares such as xfoil, ansys,etc.