Accession Number : AD0673105

Title :   WIND TUNNEL TESTS OF SOLID STATE STRAIN GAGES,

Corporate Author : BALLISTIC RESEARCH LABS ABERDEEN PROVING GROUND MD

Personal Author(s) : Platou,A. S. ; Ricci,H. A.

Report Date : JUL 1968

Pagination or Media Count : 28

Abstract : Investigations have been conducted on the use of solid state or semiconductor strain gages to increase the accuracy, range, and/or stiffness of wind-tunnel balances and pressure transducers. One of the main stimulants of this investigation is the need to improve the measuring accuracy of Magnus forces and moments acting on spinning projectiles. Semiconductor strain gages have gage factors 30 to 100 times larger than wire-wound strain gages so that increased sensitivities and accuracies are possible. The principal difficulty with semiconductor strain gages in the past has been the severe temperature effects. It is now possible to temperature compensate these gages so that they respond only to strain. This report will describe the temperature compensation, the calibration, and the use of a Magnus balance for measuring the Magnus moments on a spinning projectile. (Author)

Descriptors :   (*STRAIN GAGES, PERFORMANCE(ENGINEERING)), WIND TUNNEL MODELS, SPINNING(MOTION), FORCE(MECHANICS), MAGNUS EFFECT, ACCURACY, SENSITIVITY, TEMPERATURE, AERODYNAMIC LOADING, RELIABILITY(ELECTRONICS), STRAIN(MECHANICS), MODEL TESTS, INSTRUMENTATION, CALIBRATION

Subject Categories : Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE