11 / 20

A helicopter with a clockwise rotor system seen from above is flying backwards with zero wind. The Pilot will have the retreating blade...

  • A
    In front of him/her.
  • B
    On his/her right.
  • C
    On his/her left.
  • D
    Behind him/her.

Refer to figure.
The advancing and retreating side of the main rotor varies depending on the direction of the main rotor (clockwise or counter clockwise) as well as the helicopter's direction of flight, i.e. forward, sideways or backwards.

In forward flight the advancing side is the side of the main rotor that is moving forward at 90o angle of the direction of the helicopter. For the counter clockwise rotor the advancing side is to the right of the Pilot. For the clockwise rotor system the advancing side will be to the left of the Pilot.

For this type of question, it’s always recommended to draw a helicopter seen from above and put the direction of the flight to visualise the advancing and retreating sides.

Therefore, for a helicopter with a clockwise rotor the retreating blade for a backward flight is located on the left side of the Pilot.

Your Notes (not visible to others)

This question has appeared on the real examination, you can find the related countries below.