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Thread: Sikorsky SB-1 flies for first time
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Old 12th June 2019 | 18:10
  #65 (permalink)  
etudiant
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Joined: May 2011
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From: NEW YORK
Have to wonder, is there a plan B for Lockheed/ Sikorsky? If the coax rotor does not scale as expected, what is their fallback?
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