NACA-RM-A55K09

Abstract

The problems of the supersonic flight of large angles of attack have recently received curves within *5 percent ratios greater than 1. airplanes and missiles at increased attention as a result of the high altitudes currently encountered by such aircraft as well as the higher altitudes contemplated in the future. For missiles, these problems are of increased importance because it is practical and desirable to utilize high normal accelerations for intercepting fast targets. Relatively little information is available for use in the design of bodies, wings, and complete configurations operating at large angles. For bodies, the work of Allen and Perkins, reference 1, permits estimation of the important over-all effects of angle of attack on lift and moment. For wings, not much information is available besides the work of Gallagher and Mueller, reference 2, and Mayer, reference 3, for estimating the aerodynamic characteristics near maximum lift at supersonic speeds. Some data on the longitudinal aerodynamic characteristics of a complete missile configuration at high angles of attack are available in reference 4. <br>To fill this need for information on aerodynamic characteristics at high angles of attack, a series of tests were preformed in the Ames 1-by s-foot supersonic wind tunnel. This program investigated the effects of high angles of attack on wings, bodies, wing-body combinations, and on the wake blend the wings. Data reports on the pressure distributions on triangular and rectangular wings for several Mach numbers have been published (refs. 5 and 6). Applications of the data of this investigation have been made to the study of loads on wings and wing-body combinations in reference 7 and to considerations of stability and control in reference 8. Another report of this series, reference 9, discusses some vortex wake characteristics of an inclined body of revolution. The present report presents m analysis of the rectangular-wing data of references 5 and 6 as well as of some unpublished force data obtained during the same program. The data are compared with theory, gaps in the available theory are pointed out and, where-possible, methods are presented to fill them.