THEORETICAL AERODYNAMICS OF FLEXIBLE WINGS AT LOW SPEEDS: II - TWO-LOBED PARAWINGS.
ITEK CORP PALO ALTO CALIF VIDYA DIV
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On the basis of slender-body wing theory, the geometric and aerodynamic characteristics of two-lobed parawings are completely determined. Such wings have a vertical plane of symmetry and possess a cusp at the root chord at the same elevation as the leading edges. By superposing the two-lobed solutions with previously determined one-lobed solutions, it is possible to determine the properties of parawings in which the root chord keel is not at the same elevation as the leading edges. As examples of such parawings, the family of parawings with no leading-edge singularity is determined and the effectiveness of changes of keel incidence for the production of lift is calculated. Tabular data for use in aerodynamic design are presented together with several calculative examples. Author