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Old 13th Nov 2013, 16:28
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baobab72
 
Join Date: Jul 2010
Location: france
Age: 51
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Blade coning

Hello
My question was geared to the recovery procedure that my instructor told me for the SFAR sigmoff about the low rotor rpm, involving lower the collective to decrease the pitch angle and thus the aerodynamic load on the blades allowing them to spin faster and rolling the throttle and moving the cyclic aft to take advantage of the fact that when you move the cyclic aft, the blades cone uo and as they do so and their center of mass moves closer to the axis of rotation due to the coriolis effect they tend to spin up, restoring the RPM's.
My understanding of the system is that when you move the cyclic back you tilt the whole rotor disk backward to re-direct some total thrust along the horizontal plane which in turn propels the aircraft in that direction, but i still don t see whi the blads cone up! Cosmif it is true that one blade moves closer to the mass the other one should move further away, canceling the cone effect out! But evidently i am mistaken!

Just to clarify all this was related to the r22.

Thanks

Baobab
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