Abstract
A low-speed wind-tunnel investigation is presented, exploring the effect of delta wings configured in an 'X' biplane geometry. Wing leading-edge sweeps ranging from 50 to 70 deg and anhedrat/dihedrai angles up to 40 deg were explored. Results indicated a significant attenuation of vortex lift production, while the attached now lift component was enhanced due to nonplanarity, an outcome supported by theory developed to analytically simulate this wing geometry. Observed benefits of this wing configuration amplify with wing slenderness, where marked increases in the range parameter may be realized. Both theory and experiment indicate that the optimal anhedral/dihedral angles for the tested geometries ranged from 20 to 30 deg.
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