Without going into the excellent and detailed mechanics explaining reaction lift that others have provided for this answer, I just want to say that contrary to popular belief/high school physics textbooks, airplanes do not fly solely on account of Bernoulli's principle. According to Walter Lewin's excellent "For the Love of Physics":

"Bernoulli's principle accounts for 20% of an airplane's lift, the rest is provided by reaction lift."

Walter Lewin also poses an insightful question if planes really fly due to the equal transit theory and Bernoulli's principle (they do not!). ![enter image description here][1]

"...then how do planes fly upside down?" [1]: https://i.sstatic.net/M7cLH.gif

Without going into the excellent and detailed mechanics explaining reaction lift that others have provided for this answer, I just want to say that contrary to popular belief/high school physics textbooks, airplanes do not fly solely on account of Bernoulli's principle. According to Walter Lewin's excellent "For the Love of Physics":

"Bernoulli's principle accounts for 20% of an airplane's lift, the rest is provided by reaction lift."

Walter Lewin also poses an insightful question if planes really fly due to the equal transit theory and Bernoulli's principle (they do not!).

"...then how do planes fly upside down?"

Without going into the excellent and detailed mechanics explaining reaction lift that others have provided for this answer, I just want to say that contrary to popular belief/high school physics textbooks, airplanes do not fly solely on account of Bernoulli's principle. According to Walter Lewin's excellent "For the Love of Physics":

"Bernoulli's principle accounts for 20% of an airplane's lift, the rest is provided by reaction lift."

Walter Lewin also poses an insightful question if planes really fly due to the equal transit theory and Bernoulli's principle (they do not!). ![enter image description here][1]

"...then how do planes fly upside down?" [1]: https://i.sstatic.net/M7cLH.gif

Without going into the excellent and detailed mechanics explaining reaction lift that others have provided for this answer, I just want to say that contrary to popular belief/high school physics textbooks, airplanes do not fly solely on account of Bernoulli's principle. According to Walter Lewin's excellent "For the Love of Physics":

"Bernoulli's principle accounts for 20% of an airplane's lift, the rest is provided by reaction lift."

Walter Lewin also poses an insightful question if planes really fly due to the equal transit theory and Bernoulli's principle (they do not!). ![enter image description here][1]

"...then how do planes fly upside down?" [1]: https://i.sstatic.net/M7cLH.gif