Flight has been a dream of mankind, after the completion of the Wright brothers' first powered aircraft flight initiative, aviation technology is changing rapidly. From ancient light aircraft to hundred-ton airliners or even a fighter plane as flexible as an eagle, flight technology has become one of the amazing achievements of science and technology. Aerodynamics is a fundamental principle of flight and civil aviation unit, in order to have the ability to move in the sky, the balance of forces of air transport must be greater than weight, and thrust is greater than drag. An airplane uses its wings for lift and thrust engines. Drag is reduced by an airplane's smooth shape, and its weight is controlled by the materials it is constructed of. LiftFollowing the Bernoulli principle, to be able to launch the aircraft (on the bottom of the wing due to a pressure difference between the different flow rates) subsequently led to the overturning of the lift; the plane cannot be explained as upside down. We should be able to generate lift according to boundary layer theory, simply because of the speed of the airflow through the wing the discontinuity caused the vortex, the angle of attack (the angle of the airflow of the 'wing) when the lift larger and higher the coefficient increases the more strongly, but beyond a certain angle of attack it will not generate lift stall. Of course, it has very complex calculations on this. Drag When the object forward, until the physical body being pushed through the air encounters resistance, this resistance is called drag. If the cross-sectional area is in contact with the forward direction of the relative major, the air resistance will be greater, plus friction (friction due to the fluid there) and induced drag......half of paper.... ..engine, you have to rely on the engine to slide across the platform. Then, during landing, the engines usually shift into reverse to eliminate the force needed to move forward. Over the past century, airplanes have made our huge planet we live on a cramped little world. Furthermore, the Wright brothers successfully laid the foundation for today's astronauts. For centuries, people have dreamed of flying. But in reality, they believe that riding Aladdin's "flying carpet" in the real world is just an impossible dream. However, the ingenious creation (plane) of the Wright brothers, changed the dream of human being from myth to reality. Works Cited “Airplane Parts.” Airplane parts. Network. December 14, 2013."Theory of flight." Flight theory. Human-Vehicle Laboratory. MIT Department of Aeronautics and Astronautics, March 16, 1997. Web. December 15, 2013. Newton. I. Philosophiae Naturalis Principia Mathematica, 1687.