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Old 09-04-2014, 08:21 PM   #229
Marin
Scraping Paint
 
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Join Date: Oct 2007
Posts: 13,745
Quote:
Originally Posted by manyboats View Post
What is it that you don't understand about interference drag Marin?
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If the air is "squeezed" between the upper and lower wings of a bi-plane as you claim, you would have higher pressure against the upper surface of the lower wing which would, in effect, reduce or eliminate the ability of that wing to force air down, which would mean that the lower wing would not be contributing much or any lift, which since a bi-plane needs the lift from both wings to fly, the bi-plane wouldn't.

Your analogy was very well illustrated visually a couple of posts earlier by psneeld.
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