Chapter 3 — Problems in Designing Chrysanthemum Shellspj

In manufacturing chrysanthemum shells, most of the effort of fireworkers has been directed towards obtaining a certain number of ‘petals’ and at the same time obtaining a large flower radius. In this paper the author evaluates the fundamental conditions required to meet these objectives. The problems are two-fold. The first problem is the initial velocity attained by the stars from the action of the burst charge, that is, the problem deals with the explosion (or bursting) of the shell. The next problem is the motion of the star, which, once initially accelerated, flies in air with a trajectory of some sort and travels is one of ballistics.


Ref: Selected Pyrotechnic Publication of Dr. Takeo Shimizu, Part 4,  pp 7-17
(Sh4_7)


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