METHOD TO CAUSE TRIGGERING OF SNOW AVALANCHES Russian patent published in 2012 - IPC E01F7/04 B64C30/00 

FIELD: construction.

SUBSTANCE: method to cause triggering of snow avalanches by acoustic impact developed as an aircraft flies by with a supersonic speed in the area where the previously selected target is located, includes pilot's observation and aiming via an indicator's sight on a windshield at an underlying earth surface. Using a plane flight trajectory calculator, a rated flight trajectory is built using a log spiral. To focus a sound impact above an area of the selected target, aircraft motion is maintained along the flight trajectory with the accuracy of up to 1-2 m relatively to the rated trajectory of the spiral sharp turn. Before avalanching was caused, a spatial structure of an N-shaped pressure wave is generated. Each area of a snow avalanche is first loaded with a positive wave pulse, and then with a negative pulse, in turns during the time equal to the period of N-shaped pressure wave.

EFFECT: higher efficiency of avalanching with the help of sound impact by initiation of a sound wave developed by an airplane.

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