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Old 17th Aug 2015, 12:20
  #49 (permalink)  
Join Date: Aug 2014
Location: New Braunfels, TX
Age: 65
Posts: 1,948
Is that as close as Sikorsky can get to a BERP blade without paying the UK royalties?
Keep in mind that patents are good for 20 years (15 years for design patents). The BERP rotor was developed and patented in the 80s, way more than 20 years ago. So the patent will have expired by now.
KenV is offline