Accession Number : AD0668325

Title :   HYPERSONIC PITCH-DAMPING SUPPORT USING WATER-COOLED BALL BEARINGS.

Descriptive Note : Data rept.,

Corporate Author : NAVAL ORDNANCE LAB WHITE OAK MD

Personal Author(s) : Regan,Frank J. ; Horanoff,Eugene V.

Report Date : 26 JAN 1968

Pagination or Media Count : 35

Abstract : Free oscillation pitch-damping measurements were made on a nine degree half-angle cone at a Mach number of 8.0. The report discusses the design of the support, the water cooling system and its effectiveness in controlling the thermal environment of the bearings. In addition, an outline is given of a theoretical technique for calculation of the damping in pitch derivative for slender cones called the shock expansion method. Comparisons are made between theory and experiment. (Author)

Descriptors :   (*HYPERSONIC TEST VEHICLES, PITCH(MOTION)), (*WIND TUNNEL MODELS, *SUPPORTS), CONICAL BODIES, DAMPING, SLENDER BODIES, PERFORMANCE(ENGINEERING), HYPERSONIC CHARACTERISTICS, BALL BEARINGS, COOLING, STAGNATION POINT, FRICTION, TEMPERATURE CONTROL, OSCILLATION, CONICAL BODIES, THERMAL STRESSES

Subject Categories : Aerodynamics
      Test Facilities, Equipment and Methods
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE