AFOQT Practice Test

What occurs if the lift is not increased during a climb?

1. The aircraft ascends faster

2. The aircraft stabilizes

3. The aircraft decreases in airspeed

4. The aircraft turns to the right

The correct answer is: The aircraft decreases in airspeed

When an aircraft is climbing, it requires a specific amount of lift to overcome its weight and to increase altitude. If the lift is not increased during a climb, the aircraft will not achieve the required vertical performance. In such a situation, the aircraft will begin to lose airspeed. This decrease in airspeed occurs because the thrust remains constant while the aircraft is trying to climb. As lift fails to rise sufficiently to support the climb, the aircraft sacrifices speed in an effort to maintain altitude. This phenomenon is a basic principle of aerodynamics, where insufficient lift leads to a stall or a descent if the lift does not increase. Each increment of altitude usually requires more lift to counteract gravity. Therefore, if the aircraft is not provided with the additional lift needed while climbing, it will naturally decelerate. In climbing flight, maintaining and adjusting lift is critical for the desired performance and safety of the aircraft.