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Rotor airfoil choice?

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  • Rotor airfoil choice?

    I see that all rotor manufacturers who make extruded blades are using 8H12 airfoil which is a bit strange since this airfoil is told to be not the best for gyros application. It is understandable that Bensen wooden rotors and bonded rotors were limited in airfoil choice due to manufacturing process. But in case of extrusion why not choose the optimum? I've heard that ELA and McCutchen are now using some modern helicopter airfoils...
    Any inputs?
    Alex Lameko
    Russian gyroforum
    Visit my collection of gyro videos

  • #2
    . The choice of airfoils is controlled by the need to avoid exceeding the section

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