Main Rotor & Tail Rotor Blade Terminology

M/R & T/R Blade Terminology

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Root – portion of blade attached to the hub

Span – distance from root to tip measured along center line

Tip – End of blade farthest from the hub

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Chord –  in a cross sectional view it is the imaginary line from the leading edge to the trailing edge

Trailing edge – aft edge of airfoil

Leading edge – forward edge of airfoil in terms of direction of rotation

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