Cadet Competition Written Practice Exam

What is the primary role of elevons on a paper airplane?

1. Provide stability

2. Assist in steering

3. Control lift

4. Control descent

The correct answer is: Control descent

The primary role of elevons on a paper airplane is to control the descent. Elevons are a combination of elevators and ailerons, typically located on the trailing edge of the wings. They function by altering the airflow around the wings and can change the angle of attack for managing both pitch and roll. In the case of controlling descent, elevons can be adjusted to increase lift or decrease it by changing the aircraft’s angle relative to the oncoming air. When placed in an upward position, elevons can help reduce the speed of descent, allowing for a gentler landing. Conversely, when they are moved down, they contribute to a steeper descent by increasing drag, thus controlling the downward trajectory of the airplane. Understanding the role of elevons in this capacity is crucial for optimizing performance, especially in glides and landing approaches, making their function vital for effective flight management in a paper airplane.