# What is the science behind an airfoil?

## What is the science behind an airfoil?

EXPLANATION OF HOW IT WORKS/ IS USED: The wings provide lift by creating a situation where the pressure above the wing is lower than the pressure below the wing. Since the pressure below the wing is higher than the pressure above the wing, there is a net force upwards.

## How does an airfoil really work?

An airfoil generates lift by exerting a downward force on the air as it flows past. According to Newton’s third law, the air must exert an equal and opposite (upward) force on the airfoil, which is lift. The airflow changes direction as it passes the airfoil and follows a path that is curved downward.

What is an airfoil and how does it work?

Airfoil, also spelled Aerofoil, shaped surface, such as an airplane wing, tail, or propeller blade, that produces lift and drag when moved through the air. An airfoil produces a lifting force that acts at right angles to the airstream and a dragging force that acts in the same direction as the airstream.

### What is the science behind aerodynamics?

Aerodynamics is the study of how gases interact with moving bodies. Because the gas that we encounter most is air, aerodynamics is primarily concerned with the forces of drag and lift, which are caused by air passing over and around solid bodies.

### Why does airfoil create lift?

When the air moves over the wings, it is forced to split to go above and below the wing. The curved surface and upward angle of the wing increases the amount of air that flows under the wing, which is displaced downwards and pushes the plane up, creating lift.

What are the 4 principles of aerodynamics?

The four forces of flight are lift, weight, thrust and drag. These forces make an object move up and down, and faster or slower. How much of each force there is changes how the object moves through the air.

#### Why do planes not freeze in the air?

The absence of water in colder temperatures means there is nothing to form ice from. At an altitude of 35,000 feet, however, the clouds are made of ice crystals so no supercooled droplets exist thus, airplanes do not face icing issues.

#### Can an airplane stand still in the air?

Techincally, there is only one way for the aircraft to remain hanging motionless in the air: if weight and lift cancel each other out perfectly, and at the same time thrust and drag cancel each other out too. But this is incredibly rare. To stay in the air and sustain its flight, an aircraft needs to be moving forward.

When did the theory of airfoils become practical?

Airfoil theory based on conformal transformation became a practical tool for aerodynamic design in 1931, when the American engineer Theodorsen developed a method for airfoils of arbitrary shape, which continued to be developed well into the second half of the twentieth century. From: Aerodynamics for Engineering Students (Sixth Edition), 2013

## What are the main functions of an airfoil?

MAIN FUNCTIONAL REQUIREMENT: Provide enough lift to counter the weight of the plane. Lift and weight are two of the four forces acting on an airplane, the other two are drag and thrust (see Figure 1).

## How are stall characteristics of airfoils related?

The stall characteristics of airfoils have been correlated by an airfoil leading edge sharpness parameter Δ y which is shown in Figure 5.9. The value of Δ y increases (linearly) with airfoil thickness ratio and depends upon the NACA airfoil family as given in Table 5.2.

How are drag and thrust related to an airfoil?

Lift and weight are two of the four forces acting on an airplane, the other two are drag and thrust (see Figure 1). Figure 1: The Four Forces Acting on an Airplane DESIGN PARAMETER:Wing (Airfoil) GEOMETRY/STRUCTURE: The airplane generates lift using its wings. The cross-sectional shape of the wing is called an airfoil.