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Thread: Sikorsky X2 coaxial heli developments.
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Old 16th Jul 2011, 01:27
  #866 (permalink)  
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Join Date: Mar 2005
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The last flight of X2
As reported on the Sikorsky homepage:

Award-Winning X2 Technology Demonstrator Takes its Final Flight - Program paved the way for upcoming S-97 Raider helicopter

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