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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 3 / 3

Read the lift curve in the figure. Describe how the lift coefficient behaves as angle of attack increases, what physically happens at the critical angle, and why "stall speed" is a derived number rather than the real boundary.

CL Angle of attack, α CL max critical α Linear region Stall
Hints
  • Up to a point the curve is honest-to-goodness linear: roughly constant extra lift per extra degree.
  • Past the critical angle, the flow stops following the upper surface.
  • A wing stalls at an angle, always the same one. Speed only enters because flying slowly forces you toward that angle.
Calculations are checked exactly; written answers are graded by Claude.