K. L. and B. J. Kosanke and Larry Weinman* ABSTRACT: Although concussion mortars have been used for many years at band concerts and in theatrical performances, there has been relatively little investigation of the effectiveness of their basic design. Measurements of the effect of two modifications of the design of concussion mortars indicate that significant …
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Measurements of Glitter Flash Delay, Size and Duration
K. L. Kosanke, B. J. Kosanke & C. Jennings-White ABSTRACT: brief series of measurements were made on the flashes produced by a simple glitter formulation. In part this was done as a test of one theory for the chemistry of glitter. However, this was also done to produce some intrinsically interesting data that have not been …
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Development of a Video Spectrometer
K. L. and B. J. Kosanke ABSTRACT: A simple, low-cost visible light spectrometer, consisting primarily of a video camcorder and an inexpensive diffraction grating, was assembled and found to be of use in work to improve colored pyrotechnic flames. This instrument is all that is needed to collect and store useful, qualitative flame color information. …
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Appendix
Appendix and Tables Ref: Selected Pyrotechnic Publication of Dr. Takeo Shimizu, Part 4, pp 141-164 (Sh4_141)
Chapter 9 — Discussion and Conclusion
Tests of bursting warimono shells that were manufactured under various conditions were conducted on the ground, and the position of moving stars were analyzed by a photographic method. To make the analysis easy, ring star shells were employed as test shells. The results showed the quantitative relations among design factors, which were not clear until …
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Chapter 8 — Examples of Designing Chrysanthemum shells
8.1 Comparison of Calculated and Experimental Values The accuracy of the empirical equation for the initial velocity of a star was examined in Section 6.5.5. The accuracy of flight velocity can be examined by the probability deviations of the constant n' and log vo. Therefore, the author only compared the results obtained from the empirical …
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Chapter 7 — Equations for Practical Use in Designing Shells
Continuation of Formulae for calculating the velocity of stars Ref: Selected Pyrotechnic Publication of Dr. Takeo Shimizu, Part 4, pp 126-130 (Sh4_126)
Chapter 6 — Formulae for Calculating the Velocity of Stars
First, the author studied the law of motion of stars in the air. The velocity of stars at distant points from the shell burst was then related to the initial velocity of each star. The conditions that produced these initial velocities were investigated, and from this information, equations useful in the designing of shells were …
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Chapter 5 — Supplementary Experiments: Measurement of the Burn Velocity of Burst Charges and Stars in the Normal Atmosphere
To obtain these data, the 16-mm movie camera was used. A Black Powder pasted paper strip was arranged on a piece of metal mesh. Grains of burst charge, or stars, were arranged on the strip at intervals of about 5 cm, and the paper strip was ignited at one end. The grains or stars ignited …
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Chapter 4 — Method for Experiments on Shell Burst, Preparation and Preliminary Calculations
4.1. Experimental Method Three types of bursting charge were prepared: a) potassium perchlorate b) black powder c) potassium chlorate The stars were made with potassium perchlorate as the oxidizer. Sample 5- and 6-inch chrysanthemum shells were prepared with these materials. The shells were reinforced by pasting them with Japanese or Kraft paper. The samples were …
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