Well, we all love flying in airplanes from one place to another, but have you ever wondered how those big vehicles stay in the air? The gross answer is wings. Now that you know that wings keep a plane in flight you're probably wondering how they work. The wings keep the plane in the air thanks to the Bernoulli principle. In the following pages you will learn who Bernoulli was and how we can apply his principle to the wing model. Daniel Bernoulli (1700 - 1782), son of Johann II Bernoulli, was born in Groningen, the Netherlands. At the age of 13, Daniel was sent to the University of Basel to study philosophy and logic. He later earned his master's degree in philosophy at the age of sixteen. Although Daniel was primarily interested in mathematics, his father pushed him into the medical field where he could profit the most. Once again, Daniel attended Basel and other colleges in Europe where he earned his doctorate of medicine in 1720. While studying medicine in Venice, Daniel published his first book titled Mathematical Exercises. Daniel soon became interested in fluid flow as he worked with blood flow and blood pressure. With the help of the famous scientist Euler, Daniele published his most famous book Hydrodynamica in 1738. In this book Daniele discusses equilibrium, pressure and velocity in fluids which led to Bernoulli's principle. Read on to discover its principle. The Bernoulli equation explains how pressure and velocity are affected when liquid moves through a tube with segments of different area. The fundamental rule shown here is that as the velocity of a fluid increases, its pressure decreases. Now we can apply this rule to a wing traveling through the air, otherwise known as an airfoil. When an airfoil is tilted upward, the air above the airfoil travels faster than the air below the airfoil because it has a greater distance to travel. The higher speed above the airfoil creates a pressure drop and the lower speed below the airfoil creates a pressure increase. This results in a "push" from below otherwise known as lift. Since the wing is also angled upwards, a downward thrust is created from the trailing edge which also pushes the airfoil upwards. All this allows a plane to fly. More efficient wing designs were made to allow maximum lift for different types of aircraft.