spent a lot of time to develop airplanes. They came out with new modern airplanes. .
The History of Flight.
According to Scott (1999), "there are three principle points that should be considered in .
flying."" (The Pioneers of Flight, p 26). First, the motive power by which the body of the .
animal may be sustained is the air. Second, the wings. And third, the resistance of the .
animal's heavy body. As stated by Scott (1999), it is asked whether men may be able to fly by .
their own strength (The Pioneers of Flight, p 26). In fact, they are not able. So Leonardo da .
Vinci was the first man to think about the mechanism for flight. His notebooks contain .
sketches of a number of ornithopters, which are machines shaped like aircrafts that are held .
aloft and propelled by wing movements, and also helicopters (Lopez, Aviation a Smithsonian .
Guide, 1995, p 17). In the 1800s, inventors turned their attention to studying the shape of the .
wings and how it performed in stream of air. As a consequence, the result was the glider. .
According to Lopez (1995):.
"George Cayley's most profound insight was separating the concepts of lift, .
propulsion, and control. Though a bird's wings effortlessly provide all three functions, .
human flight could best be approached by studying and implementing each separately. .
Cayley had developed a number of fixed-wing model gliders stabilized by tail .
assemblies. Full-scale gliders soon followed."" (Aviation a Smithsonian Guide, p 16).
Pioneers Par Excellence: The Wright brothers.
In 1896, Otto Lilienthal, who performed many experiences of flying and had .
developed gliders, died. The Wright brothers had been entranced by his glider experiments, .
and his death reinforced their interest in flight (Lopez, Aviation a Smithsonian guide, 1995, p .
25). Wilbur and Overlle Wright started their experiments by studying previous experiments .
in flight. They began applying their knowledge by constructing a series of gliders.