Sonic Boom Research


Book Description




Some Effects of Flight Path and Atmospheric Variations on the Boom Propagated from a Supersonic Aircraft


Book Description

Equations for the shock wave envelope and cusp line associated with the boom propagated from a supersonic aircraft are formulated in terms of the moving-trihedral coordinate system for flight in a uniform atmosphere and also in an atmosphere with a linear sound-speed gradient. Ray-tube theory is used to calculate the lateral distribution of boom intensity in an atmosphere with a linear sound-speed gradient and also to investigate the effect of a general wind and sound-speed gradient on the ground-track intensity. The relative effects of wind and temperature gradient are treated. The mechanism of focusing by winds and by ground structures are discussed qualitatively.







Ground Measurements of Sonic-boom Pressures for the Altitude Range of 10,000 to 75,000 Feet


Book Description

The U.S. Air Force, National Aeronautics and Space Administration, and Federal Aviation Agency have engaged in a joint research program for the purpose of measuring sonic-boom pressure signatures. These measurements are presented for several locations for flight tests of fighter and bomber airplanes in the altitude range from about 10,000 to 75,000 feet and at Mach numbers from 1.1 to 2.0. Data were obtained for a variety of atmospheric wind and temperature gradients and for various flight paths and acceleration rates.