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← All subjects · Aerodynamics

Aerodynamics Beginner

01  Airfoil Anatomy

Before the numbers, the vocabulary. Chord, camber, angle of attack, and relative wind carry every conversation about wings; stall is what happens when you push one of them too far. Each step here leans on its figure, so read the picture first.

Step 2 / 3

Define relative wind and angle of attack using the figure. Then judge this claim: "The aircraft is climbing steeply, so its angle of attack must be large." Right or wrong, and why?

Chord line Relative wind α α = angle of attack: chord line measured against the relative wind
Hints
  • Relative wind is defined by the flight path, not by where the nose points.
  • Angle of attack is measured between the chord line and the relative wind. Nothing else.
  • Keep pitch attitude and angle of attack apart: a fighter in a fast vertical climb can be near zero angle of attack.
Calculations are checked exactly; written answers are graded by Claude.