Whistling rockets are simple! Video #27.2
Автор: Фейервек в ваших руках
Загружено: 2023-03-19
Просмотров: 2263
I'll show you how to make whistling rockets with pressing, but most importantly, I'll show you that you can do without it.
Whistling mixture is a pyrotechnic mixture designed to produce a whistling sound. It is a solid rocket fuel pressed into a tube under pressure. The whistling effect occurs due to the high rate of combustion of such mixtures and a series of micro-explosions on their surface. A necessary condition for the occurrence of sound vibrations and the maintenance of the pyrotechnic whistle is the pressing of the composition and the free space between the end of the burning surface and the tube cut. Pressing makes it possible to seal the fuel charge, helping to increase its mechanical strength and eliminate pores that can lead to uncontrolled flame propagation inside the fuel charge and its explosion. The free space between burning surface and the open end of the tube acts as an acoustic resonator, which sets the fundamental frequency of sound vibrations.
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