What is the dimension of a rotor blade or airfoil from root to tip?

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Multiple Choice

What is the dimension of a rotor blade or airfoil from root to tip?

Explanation:
From root to tip is described as the blade’s span. This term captures the length of the blade along its axis, describing how long the blade extends from where it’s attached at the hub to its tip. The chord is the width of the blade cross-section (leading edge to trailing edge), which is different from this length. The radius is the distance from the rotor hub to the tip, which is related but refers to the center of rotation rather than the blade’s own length. The diameter is twice the radius and describes the full width of the rotor disk, not the blade’s individual length. So the dimension from root to tip is span.

From root to tip is described as the blade’s span. This term captures the length of the blade along its axis, describing how long the blade extends from where it’s attached at the hub to its tip. The chord is the width of the blade cross-section (leading edge to trailing edge), which is different from this length. The radius is the distance from the rotor hub to the tip, which is related but refers to the center of rotation rather than the blade’s own length. The diameter is twice the radius and describes the full width of the rotor disk, not the blade’s individual length. So the dimension from root to tip is span.

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