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| Keywords: Airfoil thickness definition.svg airfoil thickness are used in the aerodynamics field here illustrated on the same airfoil In case A above the thickness is measured perpendicular to the foil camber line This is sometimes described as the American convention <ref name Houghton > cite book Aerodynamics for Engineering Students Houghton E L ; Carpenter P W 5 2003 Butterworth Heinmann 0750651113 p 17</ref> and can be seen in Houghton Carpenter 2003 <ref name Houghton /> Phillips 2010 <ref> cite book Mechanics of Flight Phillips Warren F 2 2010 Wiley Sons 9780470539750 p 27</ref> In case B above the thickness is measured perpendicular to the foil chord line This is sometimes described as the British convention and can be seen in Bertin Cummings 2009<ref> cite book Aerodynamics for Engineers Bertin John J ; Cummings Russel M 5 2009 Pearson Prentice Hall 9780132272681 p 199</ref> Note that each definition implies a different camber line geometry for a given airfoil Since the camber line curvature is small on most aircraft the effect of difference between the definitions is often small <references/> 2011-12-11 own Olivier Cleynen cc-zero Uploaded with UploadWizard Aerodynamics diagrams Diagrams of airfoil geometry Aeronautical vocabulary | ||||
