AN INVESTIGATION OF END PLATES TO REDUCE THE DRAG OF PLANAR WINGS
MISSISSIPPI STATE UNIV MISSISSIPPI STATE DEPT OF AEROPHYSICS
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An analytical and experimental study has been performed to determine the optimum design of end plates which have minimum parasite drag and maximum effect on induced drag. Experiments were performed in a smoke tunnel and at full-scale Reynolds numbers on a modified PA-18 Super Cub aircraft. Flat end plates were found to be relatively ineffectual as a means of reducing the induced drag of aircraft, and the undesirable effect of large flat plates on the directional stability of an aircraft was an important effect to be considered. Cambered wing tip plates are worthy of further consideration, since a 15 percent decrease of induced drag with a 12 percent increase of LD ratio was obtained from the configurations tested.
- Fluid Mechanics