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Old 16th Jul 2014, 17:25
  #45 (permalink)  
Boudreaux Bob
 
Join Date: Mar 2005
Location: Holly Beach, Louisiana
Posts: 916
Tourist,

However you wish to define "Derivative" is your business.

That the V-22 is directly based upon research done on the XV-3, XV-15, and projects done to overcome problems with the design of Tilt Rotor Aircraft is not debatable as it most assuredly is.

If we can say the UH-1 Huey is derived from the Bell 47, we can most assuredly say the same about the Osprey and its roots in the XV-3.

That History started in 1950 with the first flight taking place in 1955.



http://history.nasa.gov/monograph17.pdf
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