Aircraft Wing Design and Aerodynamics System Free Essay Example, 2250 words

The second misleading concept is the Skipping Stone Theory .The second misleading concept is the Skipping Stone Theory .It states that lift is generated by the simple action-reaction forces; momentum is imparted on the aerofoils when air molecules strike the bottom of the aerofoils (NASA 2014). Although the accuracy of this theory cannot be ruled out completely, it, however, does not explain most normal flight conditions, for instance, those of airliners at 35, 000 feet at a speed of 500 mph. The third misconception is the Venturi Theory whereby the upper surface of the aerofoil behaves just like the venture nozzle which constricts the airflow. Air flowing through the constriction increases in speed, and from Bernoulli s Principle, high-speed results to low pressure, and the decreased pressure on the surface of the upper surface generates lift (NASA, 2014). The "Venturi" theory is incorrect in that it tries its velocity is based upon an erroneous assumption; airflow at the constr iction generates the velocity field. 2. An Explanation of how an Aerofoil really generates liftThe lift generation details are really very complex and cannot by any means be simplified. We will write a custom essay sample on Aircraft Wing Design and Aerodynamics System or any topic specifically for you Only $17.96 $11.86/page First, the association between pressure and lift force must be well understood. The pressure is described as the change in force for each unit area. 3. The Reasons as to why the Aerofoil is shaped the way it is. Under this section, the paper explores the reasons as to why the aerofoil is rounded and not pointed at the front, why it is thicker at the middle, why it is tapered at the rear and finally, why it is flatter underneath, with a camber making it curve on top. a. Why is it rounded and not pointed at the front is difficult for air to turn through a sharp corner, and even a very slight tilt of the aerofoil would greatly disrupt the smooth flowing of air over the aerofoil.