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Thread: First Aircraft to Use a Symmetrical Airfoil
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Old 7th Jan 2011, 11:56
  #30 (permalink)  
cwatters
 
Join Date: Dec 2001
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Does this count? Circa 1923..

Autogyro-C4 | Aircraft |

"The rotor blades were of Eiffel 101 symmetrical section 28 in wide"
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