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Chapter 12: Problem 8

In addition to the wings, most airplanes have a smaller set of horizontal surfaces near the tail. Why? What does this suggest about the airplane's center of gravity?

Short Answer

Expert verified
The smaller set of horizontal surfaces near the tail, known as the tailplanes, helps provide stability and control the pitching (up and down movement) of the airplane. This suggests that the center of gravity of an airplane is typically closer to the front, not at the center. The tailplanes help balance the front-heavy airplane, keeping it stable during flight.

Step by step solution

01

Understanding the Role of the Airplane’s Tail

Smaller set of horizontal surfaces near the tail of an airplane are called the horizontal stabilizer or tailplane. Their primary function is to provide stability and control in pitching, i.e., movement of the airplane up and down.
02

Analysing the Role of Center of Gravity

The center of gravity on an airplane is the point where the weight of the airplane is balanced. It is crucial for maintaining the airplane's stability during flight. Typically, the center of gravity is located closer to the front (near the wings) and not at the center of the plane.
03

Drawing the Connection

The placement of the center of gravity towards the front and the tailplanes at the rear helps to create a lever and a balance. If the center of gravity is too far to the back, then the nose of the plane will tend to rise, making the plane unstable. Hence, the tailplanes generate a balancing force to control and stabilize this effect.

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