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Thread: Sikorsky X2 coaxial heli developments.
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Old 11th February 2008 | 01:25
  #165 (permalink)  
IFMU
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X2 at heli-expo
http://www.aviationtoday.com/rw/topstories/19065.html

http://www.aviationtoday.com/rw/issu...ort/18916.html
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