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Old 19th September 2007 | 00:56
  #18 (permalink)  
Simul8
 
Joined: May 2007
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From: Texas, USA
"Bell is also using this arrangement on the main rotors of the 427, and the 407 (OH58D)."

Not exactly...the 427 and 407 use the "soft in plane" rotor system. The only similarities between the soft in plane and the stacked are the elastomerics.
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