Editing Lift (force) (section)

====Issues common to both versions of the Bernoulli-based explanation====
A serious flaw common to all the Bernoulli-based explanations is that they imply that a speed difference can arise from causes other than a pressure difference, and that the speed difference then leads to a pressure difference, by Bernoulli's principle.  This implied one-way causation is a misconception.  The real relationship between pressure and flow speed is a [[#Mutual interaction of pressure differences and changes in flow velocity|mutual interaction]].<ref name="ReferenceA"/> As explained below under [[#A more comprehensive physical explanation|a more comprehensive physical explanation]], producing a lift force requires maintaining pressure differences in both the vertical and horizontal directions.  The Bernoulli-only explanations do not explain how the pressure differences in the vertical direction are sustained.  That is, they leave out the flow-deflection part of the interaction.<ref name="ReferenceA"/>

Although the two simple Bernoulli-based explanations above are incorrect, there is nothing incorrect about Bernoulli's principle or the fact that the air goes faster on the top of the wing, and Bernoulli's principle can be used correctly as part of a more complicated explanation of lift.<ref>"There is nothing wrong with the Bernoulli principle, or with the statement that the air goes faster over the top of the wing. But, as the above discussion suggests, our understanding is not complete with this explanation. The problem is that we are missing a vital piece when we apply Bernoulli's principle. We can calculate the pressures around the wing if we know the speed of the air over and under the wing, but how do we determine the speed?" ''How Airplanes Fly: A Physical Description of Lift'' David Anderson and Scott Eberhardt {{cite web|url=http://www.allstar.fiu.edu/aero/airflylvl3.htm|title=How Airplanes Fly|access-date=26 January 2016|url-status=live|archive-url=https://web.archive.org/web/20160126200755/http://www.allstar.fiu.edu/aero/airflylvl3.htm|archive-date=January 26, 2016}}</ref>