ESDU AERO W.02.04.03
Profile drag of smooth aerofoils with straight trailing- edges at low speeds.
Abstract:ESDU AERO W.02.04.03 gives curves of form factor as a function of thickness/chord ratio and transition position on three types of aerofoils (representative of low-drag aerofoils such as the NACA 6A and RAE 100 to 104 series) defined as having maximum thickness at 0.36, 0.38 and 0.41 of chord and maximum suction at respectively 0.3, 0.4 and 0.5 of chord. To obtain the drag of the aerofoils the data for the drag of a flat plate given in ESDU AERO W.02.04.01 is factored by the corresponding value of the form factor obtained from the curves; where transition occurs on the upper and lower surfaces at different positions an average position is assumed.
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