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Thread: Why Helicopters Make Noise: Germans Show How
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Old 22nd January 2014 | 22:13
  #12 (permalink)  
Lonewolf_50
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Joined: Aug 2009
: Military
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From: Texas
In re blue edge:
1. How much more does it cost per blade?
2. What does that complexity in geometry do to periodic repair / refurbishment / overhaul costs?

On the other hand, looks neat.
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