SACAA CPL(H) Principles Of Flight Practice Questions - SACAA Commercial Pilot Licence (Helicopter) Principles Of Flight Examination Exam

What is the primary aerodynamic purpose of incorporate geometric blade twist (linear wash-out) in main rotor blades?

To equalize lift distribution along the blade span by giving the root a higher pitch angle than the tip. To increase rotational speed at the blade tip relative to the root. To eliminate gyroscopic precession in the rotor system. To shift the centre of gravity of the blade forward of the pitch axis.

Correct Answer:

To equalize lift distribution along the blade span by giving the root a higher pitch angle than the tip.

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