Why is it so difficult for us to just replicate a bird instead of the kind of fixed wing aircraft we have?

Question

Why is it so difficult for us to just replicate a bird instead of the kind of fixed wing aircraft we have?

In: 164

Answer 1

One thing that hasn’t been mentioned either is that the wing shape of a plane (airfoil) does in fact replicate/is very similar to a birds wing in cross-section.