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Unformatted text preview: Lecture F03 Mud: ThinAirfoil Analysis Problem (continued) 1. Tough to visualize the coordinate? (1 student) Its similar to the physical x coordinate, except that the coordinate is more bunched up at the leading edge and trailing edge. Imagine sliding along the halfcircle (3rd figure in F2 notes) at a uniform speed in . Your horizontal velocity in x will be very slow near the leading edge, normal in the middle, and then slow again near the trailing edge. 2. Whats the origin that is measured from? The quarterchord? (1 student) No, from the leading edge. As x runs from to c along the chord, runs from to . See the 3rd figure in F2 notes. 3. What exactly is the Fourier series representing? (1 student) The function f ( ) dZ/dx . This is the angle between the freestream direction and the camberline surface. 4. What does c m,c/ 4 = lift forces dL 4 ( A 2 A 1 ) c/ 4 x physically mean? (1 student) The moment about the quarterchord point can be written...
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 Fall '05
 MarkDrela

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