Consider the "Air-foil", which led to flight. In one sense, its an approximation of the wings of birds and other animal Not true; "lift" was well known for tho

Consider the "Air-foil", which led to flight. In one sense, its an approximation of the wings of birds and other animal Not true; "lift" was well known for thousands of years, horizontal "lift" is how ships sail upwind. The breakthrough for the Wright bros was making something light enough to make use of this phenomenon vertically.