Valentin Grozev, Radi Ganev, Ivan Glavchev ABSTRACT: Investigations were conducted on the effect of ultrasound on single-base propellants. Changes in the average viscosimetric molecular weight of nitrocellulose in the solutions of propellants in acetone and in a mixture of ethyl alcoholdiethyl ether were studied. It has been established that, for at least 60 minutes, the …
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Category:JPyro – Articles
The main category – things that are published in the Journal
Review of: Black Powder Manufacturing, Testing, and Optimizing – Ian von Maltitz
Black Powder Manufacturing, Testing, and Optimizing Ian von Maltitz Review by J Bergman As Mr. von Maltitz states in the preface, this work is not merely a second edition of his earlier book, Black Powder Manufacture, Methods and Techniques, as reviewed in Journal of Pyrotechnics No. 7 (Summer 1998). Despite similarities in its content and …
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Thermodynamics of Black Powder and Aerodynamics of Propelled Aerial Shells
John E. Mercer ABSTRACT: This paper describes the theoretical basis of a computer code that numerically models firework mortars. The code analyzes both the Black Powder propelling and flight segments of a shell. Equations for the gas dynamics of Black Powder combustion, leakage flow around the shell and aerodynamics of flight are included. Representations for commonly …
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Accidents and their Role in Aiding the Management of Health and Safety in Pyrotechnics Manufacture
Allen Webb ABSTRACT: The investigation and analysis of the causes and circumstances of accidents can be an invaluable tool in assessing the effectiveness of systems for the management of health and safety. This article considers and draws on the lessons learned from a number of accidents to suggest a general framework to aid the development …
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Preface to Three Reviews of Pyrotechnics – A P Hardt
Pyrotechnics A P Hardt Reviews by B. E. Douda, S. D. Poehlein & S. K. Wilharm and B. Sturman On occasion, when a book to be reviewed has special significance, we have included more than one reviewer’s comments about it. In the present case we are including three reviews by authors with differing backgrounds, and …
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Test Burn of a Temporary Fireworks Stand
David Lynam ABSTRACT: In 1997, a burn test was performed on a temporary retail fireworks stand stocked with 900 pounds (400 kg) of a range of consumer fireworks. A maximum interior temperature of 1,400 °C was recorded inside the test stand and flashover occurred within approximately one minute of involvement of the fireworks. Ignited fireworks …
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Thermodynamic Modeling of High-Temperature Systems
Gleb V. Belov ABSTRACT: An outline of thermodynamic modeling of high-temperature systems is presented, including a historical introduction. There is no intention to provide a complete history of thermodynamic modeling, so neither vapor-liquid equilibria nor the thermodynamics of non-ideal solutions is discussed. This article reflects the author’s personal vision of the state of the art. …
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Evaluation of the Hazards Posed by High Energy Bangers Part 2. Damage to Hand Simulants
R. K. Wharton and A. E. Jeffcock ABSTRACT: This paper reports the development and construction of hand simulant models and their use to evaluate the extent of injury to persons holding, or being near to, high energy bangers when they are initiated. The test work suggests a risk of severe injury to the hand and …
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Particle Size Effect in Pyrotechnic Compositions Containing Potassium Chlorate
M. Fathollahi, S. G. Hosseini, S. M. Pourmortazavi, and F. Farahani ABSTRACT: In this research, the effect of potassium chlorate particle size on the heat of reaction and the ignition temperature was studied. Potassium chlorate of known particle size was prepared by crystallizing saturated solutions of potassium chlorate at various cooling rates and then isolating …
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Review of: Proximate Special Effects Familiarization & Safety – J. Larry Mattingly, David A. Opperman, MD, Francis “Pinky” Pinkerton
Review of: Proximate Special Effects Familiarization & Safety J. Larry Mattingly, David A. Opperman, MD, Francis “Pinky” Pinkerton Review by Stephen Miller M.I.Exp.E., After many years of drought, the rain is falling for those praying for a basic technical reference book on stage pyrotechnics. The stage and special effects industry as a whole has been …
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