Fine Structure

Why Planes Fly, or The Coanda Effect

Everyone thinks that planes fly via the pressure differences created by the shape of their wings (i.e. Bernoulli's principle). Unfortunately, everyone's only partially correct. The Coanda Effect is mostly responsible for lift, pulling air that is initially going straight over the wing towards the ground. Force on the air? Downward. Force on the wing? Upward. The description in the link is good, but check out this presentation for more details.

I tend to think about forces in real life and I've always attributed this kind of lift to Bernoulli. I wonder how one could isolate these forces to determine their relative strength in the comfort of their own home?
http://dmiessler.com/blog/why-planes-fly-what-they-taught-you-in-school-was-wrong

Comments