Originally Posted by MARTINSR
No, actually they do exactly as they were designed to do. When man was first trying to figure it out, no they didn't fly, because they were trying to fly like a bird. But the design of the wing was done on paper long before one was made. It was proven on paper with mathmatics that the air going over the top of the wings shape would take more time thus creating lift by the air under the wing. This is a scientific principle that makes it work. Many people would have died trying to simply make things fly if this principle hadn't been created on a piece of paper with a quill pen.
You might want to do a little more reading.. They said the helicopter was not suppose to fly..