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Thread: Sikorsky X2 coaxial heli developments.
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Old 16th May 2009, 01:22
  #458 (permalink)  
riff_raff
 
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X2 vs. Bell HTR
So what's a better overall compromise- Sikorsky's X2 coaxial or Bell's Hybrid Tandem Rotor configuration?

http://www.flightglobal.com/blogs/th...em%20rotor.jpg
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