Metal blade - designed to be individually interchangeable, Vertol's new metal rotor blades reduce vibration, eliminate erosion problems and stay in track longer. The forward portion is a D-shaped spar formed by cold rolling a Rockrited steel tube. The addition of a trailing edge modifies the section from a standard NACA 0012 symmetrical airfoil to a modified cusped section for better dynamic and aerodynamic characteristics. The entire blade is bonded, eliminating stress concentrations and reducing the possibility of fatigue failure. From Vertiflite (AHS Newsletter) May 1957.
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Vertol's improved metal rotor blade

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Metal blade - designed to be individually interchangeable, Vertol's new metal rotor blades reduce vibration, eliminate erosion problems and stay in track longer. The forward portion is a D-shaped spar formed by cold rolling a Rockrited steel tube. The addition of a trailing edge modifies the section from a standard NACA 0012 symmetrical airfoil to a modified cusped section for better dynamic and aerodynamic characteristics. The entire blade is bonded, eliminating stress concentrations and reducing the possibility of fatigue failure. From Vertiflite (AHS Newsletter) May 1957.

 

Added to Boeing/Vertol (Vertiflite... and categorized in — 6 years ago

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