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Old 5th January 2011 | 22:03
  #20 (permalink)  
cwatters
 
Joined: Dec 2001
Posts: 1,389
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From: England
Two thoughts...

1) Air pressure at sea level is around 2000 Lbs/sqft so is 85 Lbs/sqft really "high" in percentage terms (just 4%)?

2) Reynolds number. Big fast wings are more efficient than small slow ones.

Low Reynolds Number Airfoil Design
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