What rotor dimension is measured from root to tip?

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Multiple Choice

What rotor dimension is measured from root to tip?

Explanation:
Span is the distance from where the blade attaches at the hub (the root) to the tip of the blade. That root-to-tip length defines the blade’s span, i.e., the blade’s overall length along its span. The radius is the distance from the rotor axis to the blade tip (often numerically similar, since it’s measured from the center rather than from the root along the blade), chord is the blade’s width, and pitch is the blade’s angle of attack. So the dimension measured from root to tip is the blade’s span.

Span is the distance from where the blade attaches at the hub (the root) to the tip of the blade. That root-to-tip length defines the blade’s span, i.e., the blade’s overall length along its span. The radius is the distance from the rotor axis to the blade tip (often numerically similar, since it’s measured from the center rather than from the root along the blade), chord is the blade’s width, and pitch is the blade’s angle of attack. So the dimension measured from root to tip is the blade’s span.

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