Accession Number : AD0377344

Title :   SOME INSTABILITY PROBLEMS WITH RE-ENTRY SHAPES.

Descriptive Note : Memorandum rept.,

Corporate Author : BALLISTIC RESEARCH LABS ABERDEEN PROVING GROUND MD

Personal Author(s) : MacAllister,Leonard C.

Report Date : AUG 1959

Pagination or Media Count : 41

Abstract : Models of certain ICBM and IRBM nose-cone configurations have shown limit cycle yawing motions in low supersonic and high subsonic flight. For a given configuration the amplitudes of these limit cycles vary with Mach number, and possibly with Reynolds number. In general, the configurations exhibit limit cycles because of nonlinear damping moments, particularly in high subsonic flight. This paper presents the more interesting of these phenomena as observed by model firings in the free flight spark ranges of Ballistic Research Laboratories. These phenomena are correlated, when possible, with variations in flow phenomena. (Author)

Descriptors :   (*REENTRY VEHICLES, AERODYNAMIC CONFIGURATIONS), AERODYNAMIC CHARACTERISTICS, STABILITY (U) SPARK SHADOWGRAPH PHOTOGRAPHY, SURFACE TO SURFACE MISSILES, NOSE CONES, SUPERSONIC CHARACTERISTICS, SUBSONIC CHARACTERISTICS, MODEL TESTS, BODIES OF REVOLUTION, MOMENTS, DAMPING, YAW, MASS

Subject Categories : Guided Missiles
      Surface-launched Guided Missiles
      Unmanned Spacecraft

Distribution Statement : APPROVED FOR PUBLIC RELEASE