Which of the following is a component of the Basic Aerodynamic Model?

• A. Time of Flight
• B. Enthalpy
• C. Chord Line
• D. Rudder Angle

Answer: (C)

The basic aerodynamic model centers on how air interacts with the wing geometry to produce forces. The chord line is the straight line from the wing’s leading edge to its trailing edge and serves as the reference for defining the angle of attack—the angle between the chord line and the relative wind. This angle, together with dynamic pressure and wing area, determines the aerodynamic coefficients that give lift and drag in the model. So the chord line is a fundamental component of the basic aerodynamic model. Time of flight relates to mission duration, enthalpy is a thermodynamic property, and rudder angle is a control input; none of these form the core geometric and flow relationships used to predict lift and drag in the model.