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Old 17th Nov 2013, 06:37
  #11 (permalink)  
Ascend Charlie
 
Join Date: Sep 2002
Location: Great South East, tired and retired
Posts: 4,387
Received 226 Likes on 104 Posts
I may be wrong,
That's correct.

I also don't believe that the cone angle of a rotor's blades technically changes.
Whether you believe it or not, it happens.

Stand beside a helicopter when it is at 100%RRPM and flat pitch, on the ground. See how there is almost no coning, the blade tips are spinning at almost the same level as the hub.

Then watch as the pilot applies collective to lift to the hover - the bigger and heavier the machine, the better demonstration. See how the tips are now spinning around much higher than the hub. The blades are coning up. It might be through the use of the flapping hinges, or through the rubber bearings, or (in the BO 105 and BK 117) the blades themselves bending up.

Believe it now?
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