Paper airplanes fly, and they have flat wings! It turns out that flat wings work just fine, but the airfoil shape we see on airplanes is more efficient: http:

Paper airplanes fly, and they have flat wings! It turns out that flat wings work just fine, but the airfoil shape we see on airplanes is more efficient: http://warp.povusers.org/grrr/airfoilmyth.html http://warp.povusers.org/grrr/airfoilmyth.html