AFOQT Practice Test

What is the primary disadvantage of using a rectangular wing planform?

1. High efficiency

2. It is lightweight

3. Low maneuverability

4. High drag and inefficiency

The correct answer is: High drag and inefficiency

The primary disadvantage of using a rectangular wing planform lies in its tendency to create higher drag and inefficiency. Rectangular wings typically generate more lift at lower angles of attack, but they also produce more induced drag, especially at high lift conditions. This results in a less streamlined airflow around the wing, which reduces overall aerodynamic efficiency, particularly at higher speeds. In contrast with other wing shapes, such as elliptical or tapered wings, a rectangular wing does not optimize lift distribution across the span, leading to greater drag when flying at various angles of attack. This drag can adversely affect performance, making the aircraft less fuel-efficient and potentially limiting its top speed and climb performance.