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Thread: Sikorsky X2 coaxial heli developments.
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Old 26th August 2010 | 07:44
  #747 (permalink)  
heli1
 
Joined: Jul 2005
Posts: 912
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From: UK
The fairey FB1 was a gyrodyne...as was its big brother the Rotodyne.
The main rotor became unpowered in forward flight.
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