Which of the following statements is correct:
1. The camber line is the curvature of the upper and lower surfaces of the airfoil.
1. The camber is the cross area between the chord line and the mean camber line.
The first statement is my own understanding and it is clearly illustrated here:
http://www.grc.nasa.gov/WWW/k-12/airplane/geom.html
The second statement appears in the cfi written test prep - airplanes & aerodynamics - Gleim - questions number 64 (DISCUSSION).
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