Accession Number : AD0263796

Title :   INVESTIGATION OF THE LOW-SUBSONIC STABILITY AND CONTROL CHARACTERISTICS OF A FREE-FLYING MODEL OF A THICK 70 DEGREE DELTA REENTRY CONFIGURATION

Corporate Author : BROWN UNIV PROVIDENCE R I DIV OF APPLIED MATHEMATICS

Personal Author(s) : PAULSON,JOHN W. ; SHANKS,ROBERT E.

Report Date : MAY 1961

Pagination or Media Count : 1

Abstract : The longitudinal stability and control characteristics were considered satisfactory when the model had positive static longitud nal stability. It wa possible to fly the model with a small amount of static instability, but the longitudinal characteristics were considered unsatisfactory in this condition. At angles of attack above the stall the model developed a large, constant-amplitude pitching oscillation. The lateral stability characteristics were considered to be only fair at angles of attack from about 20 deg to 35 deg because of a lightly damped Dutch roll oscillation. At higher angles of attack the oscillation was well damped and the lateral stability was generally satisfactory. The Dutch roll damping at the lower angles of attack was increased to satisfactory values by means of a simple rate-type roll damper. The lateral control characteristics were generally satisfactory throughout the angle-of-attack range, but there was some deterioration in aileron effectiveness in the high angle-ofattack range due mainly to a large increase in damping in roll. (Author)

Descriptors :   *DELTA WINGS, *REENTRY VEHICLES, *STABILITY, CONTROL, MEASUREMENT, SUBSONIC FLOW, TEST METHODS, WIND TUNNEL MODELS, WIND TUNNELS

Distribution Statement : APPROVED FOR PUBLIC RELEASE