Noise Survey of a Full-scale Supersonic Turbine-driven Propeller Under Static Conditions


Book Description

Overall sound-pressure levels and frequency spectra of the noise emitted from a full-scale, 7.2-foot-diameter, 3, 500 rpm, three-blade, supersonic propeller mounted on a turbine-powered airplane have been obtained under static conditions at stations about the propeller at a 100-foot radius.







Index of NACA Technical Publications


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Thermal Fatigue of Ductile Materials


Book Description

An experimental study was made of the changes in the stress-rupture life, ductility, hardness, and microstructure of S-816 and Inconel 550 specimens that had been exposed to varying amounts and conditions of thermal fatigue.







Report


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