Accession Number : AD0283271

Title :   RESEARCH ON ANNULAR NOZZLE TYPE GROUND EFFECT MACHINE. PRESSURE TRANSDUCER

Corporate Author : CALIFORNIA UNIV BERKELEY HYDRAULIC ENGINEERING LAB

Personal Author(s) : HORNING,D.O. ; CUMMING,J.D.

Report Date : MAR 1962

Pagination or Media Count : 1

Abstract : A pressure transducer is described which was designed to measure pressure fluctuations of the annular jet ground effect machine from 0 to 6 psig with a sensitivity of at least .01 psi, a minimum uniform frequency response up to 40 cps, and its size was limited to a one inch diameter. By minor modifications, the sensitivity was increased to detect pressure differences of .002 psig and under ideal conditions to as low as .0007 psig, and the frequency response exceeded the minimum requirement and was determined to be approximately 170 cps. The ultimate sensitivity was limited by fluctuations in ambient temperature, harmonic distortion and uncontrollable atmospheric pressure disturbances. (Author)

Descriptors :   *FLYING PLATFORMS, *PRESSURE GAGES, *TRANSDUCERS, ANNULAR NOZZLES, DIAPHRAGMS (MECHANICS), DUCTED FANS, GROUND EFFECT MACHINES, NOZZLES, PRESSURE, SENSITIVITY, TEST EQUIPMENT

Distribution Statement : APPROVED FOR PUBLIC RELEASE