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Old 1st May 2005 | 13:34
  #32 (permalink)  
Lu Zuckerman

Iconoclast
 
Joined: Sep 2000
Posts: 2,132
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From: The home of Dudley Dooright-Where the lead dog is the only one that gets a change of scenery.
Thumbs up At risk of opening old wounds....

To: Chiplight


If only Lu could be so open to suggestion regarding phase offset we could eliminate about a gigabyte of discussion on this forum.
I have been told so many times by so many people that I am wrong about my premise regarding the 18-degree offset that I almost believe it. Having said that I ask you the following question: How much of an aerodynamic genius would it take to design a rotorhead that was entirely different from all other rotorheads in that it had flapping hinges but no capability of leading and lagging. This rotorhead was married to a flight control system similar to that of a Bell and because of this disparity the rotor had to be offset 18-degrees in order to rig the helicopter.

Then this aerodynamic genius had to design a rotorblade that had a 72-degree phase angle.

The Lynx has a 15-degree offset during the rigging process and when forward cyclic is introduced the helicopter would fly to the left. Why couldn’t Westland design a blade that had a 75-degree phase angle so that it would fly like the Robinson which has an 18-degree offset and which according to what I have been told flies straight ahead with the introduction of forward cyclic.

Lu Zuckerman is offline