Which part of the rotor disc produces the most lift during forward flight?
- The mid-span portion.
- The front portion.
- The rear portion.
Explanation from PART66Online
As a helicopter accelerates in forward flight, induced flow drops to near zero over the front of the disc and increases over the rear. The blades at the front therefore work at a larger angle of attack and produce more lift than those at the rear, a difference called transverse flow effect. Blade flapping is a response to that lift difference, not its cause: because the rotor acts like a gyro, the maximum flapping displacement appears 90 degrees later in the direction of rotation.
J
jan.grindheim asked · 8 Jul 2021
Is the answer correct?
Community Comments (2)
J
Jordi
1 Sep 2021
yes it is it is also called advancing blade and it produces the most lift.
J
jan.grindheim
30 Sep 2021
For forward flight the rotor disc must be tilted forward, so the aft portion of the disc should be producing more lift to achieve this (move cyclic forward).
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