Student Pilot Basic Aerodynamics Flashcards

What is the relationship between angle of attack and coefficient of lift up to the critical angle?

Answer: As angle of attack increases, coefficient of lift increases

As angle of attack increases toward the critical angle, the coefficient of lift increases steadily until the wing stalls.

What happens at the critical angle of attack?

Answer: Airflow over the upper wing surface separates, causing a stall

At the critical angle of attack (typically around 15-20°), the smooth airflow over the upper wing surface breaks down and the wing stalls.

Dynamic pressure in the airflow is primarily dependent on:

Answer: Air density and the square of velocity

Dynamic pressure (q) is defined as ½ρV², meaning it depends on air density and the square of the true airspeed.

Ground effect is most pronounced when the aircraft is flying at a height equal to:

Answer: The wingspan or less

Ground effect is most pronounced when flying at a height equal to or less than the wingspan, reducing induced drag significantly.

Which condition best describes a wing in a stalled state?

Answer: Angle of attack above critical angle with separated airflow

A stall occurs when the angle of attack exceeds the critical angle and the smooth airflow over the upper surface separates.

The term 'relative wind' refers to:

Answer: The airflow direction relative to the moving aircraft, opposite to the flight path

Relative wind is the airflow experienced by the aircraft as a result of its motion through the air, flowing opposite to the flight path.

What is 'form drag' caused by?

Answer: The shape of an object disrupting airflow and creating turbulent wake

Form drag results from the shape of an object separating airflow and creating a low-pressure turbulent wake behind it.