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Old 17th Aug 2015, 10:56
  #47 (permalink)  
Join Date: Jul 2006
Location: The back of beyond
Posts: 1,541
Tourist is right Bob; derivative is not the same as descended from.

If we can say the UH-1 Huey is derived from the Bell 47...
But we can't, as it isn't. It is descended from the Bell 47, but not derived from it.
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