Which blade location is defined as the blade located in a semicircular part of the rotor disk where the blade direction is opposite to the direction of flight?

Which blade location is defined as the blade located in a semicircular part of the rotor disk where the blade direction is opposite to the direction of flight?

• A. Retreating Blade
• B. Advancing Blade
• C. Lateral Blade
• D. Inboard Blade

Answer: (A)

In forward flight the rotor disk has two halves: the advancing side, where blades move in the same direction as the helicopter’s travel, and the retreating side, where blades move opposite to the flight direction. The blade located in the semicircular portion of the rotor disk where its motion is opposite to the direction of flight is the retreating blade. This blade sits on the rear half of the disk relative to the helicopter’s motion. The other terms listed aren’t used to describe this location, so they don’t fit.

In forward flight the rotor disk has two halves: the advancing side, where blades move in the same direction as the helicopter’s travel, and the retreating side, where blades move opposite to the flight direction. The blade located in the semicircular portion of the rotor disk where its motion is opposite to the direction of flight is the retreating blade. This blade sits on the rear half of the disk relative to the helicopter’s motion. The other terms listed aren’t used to describe this location, so they don’t fit.