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Chapter 15: Problem 13

Why do airplanes take off into the wind?

Short Answer

Expert verified
Airplanes take off into the wind because the oncoming wind increases the airflow over the wings, generating more lift. This allows the airplane to reach the required lift for takeoff more quickly and with less ground distance required.

Step by step solution

01

Understanding Lift

Lift is the upward force that opposes gravity and keeps the airplane in the air. Lift is generated by the flow of air below and above the airplane's wings, and is directly affected by the speed of that flow. Thus, the more the airplane's speed, the more is the lift.
02

Role of Wind in Generating Lift

When an airplane takes off into the wind, it effectively increases its speed relative to the flow of air over and under its wings. This happens because the wind speed is added to its speed. Therefore, there is effectively more air flow, which contributes to achieving the required lift force more quickly and with less ground distance required.
03

Impact of Taking off into the Wind

Because taking off into the wind generates more lift more quickly, airplanes need less runway to achieve the necessary airspeed for takeoff. This makes it safer and more efficient for them to take off in this manner, as they can reach their required takeoff speed with less acceleration and distance.

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