FAA Ground School Practice Test

What impact does frost on the wings of an airplane have on takeoff performance?

1. It improves fuel efficiency

2. It disrupts the smooth flow of air over the wing

3. It increases the aircraft's speed

4. It assists in achieving a higher altitude

The correct answer is: It disrupts the smooth flow of air over the wing

Frost on the wings of an airplane significantly disrupts the smooth flow of air over the wing. This change in airflow can lead to a variety of negative effects on the aircraft's lift and overall performance during takeoff. When frost accumulates, it alters the wing's shape and surface characteristics, which can lead to increased drag and reduced lift generation. As a result, the aircraft may require a longer distance to achieve takeoff speed, and in some cases, it may hinder the aircraft's ability to take off altogether. Understanding the implications of frost is crucial for ensuring safe flight operations, particularly under winter weather conditions. This knowledge informs pilots to inspect and, if necessary, remove frost before flight to maintain optimal aerodynamic performance.