What does the term Root refer to when dealing with Main Rotor Blades?

What does the term Root refer to when dealing with Main Rotor Blades?

• A. the portion of the rotor blade that attaches the blade to the hub.
• B. the tip of the blade.
• C. the leading edge.
• D. the blade's root

Answer: (A)

Root describes the portion of a main rotor blade that attaches to the hub, located at the inner end where the blade connects to the hub assembly. This is the critical junction that transfers aerodynamic loads from the blade into the rotor system and supports the mechanism that changes the blade’s pitch. The tip is simply the far end of the blade, not where it attaches to the hub; the leading edge is the forward edge along the blade’s span. Saying the blade’s root is just naming the term doesn’t describe its function, so the correct description focuses on its attachment to the hub.

Root describes the portion of a main rotor blade that attaches to the hub, located at the inner end where the blade connects to the hub assembly. This is the critical junction that transfers aerodynamic loads from the blade into the rotor system and supports the mechanism that changes the blade’s pitch. The tip is simply the far end of the blade, not where it attaches to the hub; the leading edge is the forward edge along the blade’s span. Saying the blade’s root is just naming the term doesn’t describe its function, so the correct description focuses on its attachment to the hub.