A Flight Investigation of the Effect of Surface Roughness on Wing Profile Drag With Transition Fixed
Description: Report presenting a flight investigation made on a wing section of a P-47D airplane to determine the effect of roughness on wing profile drag with transition fixed far forward. Surveys of the wake were made for two surface conditions with transition fixed by a thread at 5 percent chord back of the leading edge on the upper and lower surfaces. Below the Mach number at which shock occurred, variations in Mach number of as much as 0.16 appeared to have no appreciable effect on the section profile-drag coefficients of either the smooth or roughened surfaces with transition fixed.
Date: September 1944
Creator: Zalovcik, John A. & Wood, Clotaire
Partner: UNT Libraries Government Documents Department