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Old 8th Aug 2013, 13:33
  #141 (permalink)  
HeliHenri
 
Join Date: Dec 2011
Location: Europe
Age: 59
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Developing and qualifying a new engine installation and dynamic components (even without new gearboxes) is no small task.
About 8 years to do so ! you're right, not a small task for Sikorsky
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