Accession Number : AD0063453


Title :   REDUCTION OF DRAG DUE TO LIFT AT SUPERSONIC SPEEDS


Corporate Author : DOUGLAS AIRCRAFT CO INC SANTA MONICA CA


Personal Author(s) : GRAHAM, E W ; LAGERSTROM, P A ; BEANE, B J ; LICHER, R M


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/063453.pdf


Report Date : Apr 1954


Pagination or Media Count : 13


Abstract : $EVERAL TOPICS RELATING TO THE REDUCTION OF DRAG DUE TO LIFT AT SUPERSONIC SPEEDS ARE DISCUSSED. The distribution of camber for optimial loading of diamond planform wings and some low drag geometries for rectangular wings are determined. It appears that substantial drag reduction, through the use of spanwise distribution of camber, may be achieved only for low reduced aspect ratios, M2-1 AR. The distribution of lift throughout volumes of prescribed shape is considered and some optimum distributions found for certain cases. It is shown that optimum spatial distributions of lift arc generally not unique. The possibility of using biplanes is explored and it is concluded that for non-interfering biplanes (wings acting as isolated monoplanes) there is an inherent structural advantage which is the result of a scale effect for geometrically similar structures The preacnt status of means for drag reduction is surveyed and the direction for further study indicated.


Descriptors :   *AERODYNAMIC DRAG , *SUPERSONIC FLIGHT , *SUPERSONIC FLOW , *WINGS , OPTIMIZATION , SHAPE , SCALING FACTOR , ASPECT RATIO , LOW DRAG , DRAG REDUCTION , CAMBER , PLANFORM


Subject Categories : Aerodynamics


Distribution Statement : APPROVED FOR PUBLIC RELEASE