# Measuring Bernoulli in airplanes

One common explanation for airplane lift is that air pressure over the wing both moves faster and has lower pressure, a la Bernoulli. A very different explanation is that air is deflected downward by the lower wing surface, thus creating upward thrust. Probably both effects count, and it should be possible to gauge their relative contribution. One can measure, with sensors, the top-to-bottom pressure difference at many points in a real wing in flight. Integrating over the wing, is the total force equal to the weight of the plane? Surely, after 118 years of light, this has been done -- hasn't it??

• Of course it has been done. It's a standard wind tunnel lab experiment in any university aerodynamics course. Commented Apr 30, 2021 at 22:31
• Both of them are not separate effects. You cannot have one and not the other . So it does not make sense to talk about their relative contribution. Each of them can be used to explain lift and calculations using any of the effect will give you the total amount of lift Commented May 1, 2021 at 6:22