Conservation+of+Energy+N+Bernoulli's+Principle

Why does the pressure drop going over a wing or through a constriction?

I came across the phrase recently that the Bernoulli effect is an application of the law of conservation of energy. I didn't remember this being taught in my physics class 30 years ago, so here is how I grok it.

Bernoulli's principle is an application of the law of conservation of energy and preceded this law by 100 years. A wing's lift is due to the conservation of energy. The volume of air going over and under the wing are equal. The moving volumes of air have both kinetic energy and pressure. As the air goes over the wing, its kinetic energy increases. (This is because it speeds up to travel a longer distance in the same time as the air below the wing.) This kinetic energy has to come from someplace so it comes from the potential energy in air pressure. So when the kinetic energy increases in the air going over the wind, its pressure decreases. This reduction in pressure results in lift. This transformation of potential energy in air pressure to kinetic energy in the moving air is how Bernoulli's principle works.

Source: http://hyperphysics.phy-astr.gsu.edu/hbase/pber.html

Project http://www.greatscienceforkids.com/science-experiments/physics/flying-cups-bernoulli https://www.teachengineering.org/view_activity.php?url=collection/cub_/activities/cub_airplanes/cub_airplanes_lesson01_activity1.xml Blow through hole in bottom of the cup. Blow between sheets of paper Gently blow between the cups.

Wind Tunnel (poor mans) http://www.greatscienceforkids.com/science-experiments/aerodynamics/poor-mans-wind-tunnel Wings slide up and down string

A related debate: http://www.grc.nasa.gov/WWW/K-12/airplane/bernnew.html https://weather.com/series/warp/video/basketball-does-unexpected-trick-due-to-magnus-effect

Floating Screwdriver https://www.youtube.com/watch?v=jAYP6pWrdkc