Aluminum flares

Ref A. Stettbacher, Explosivst 1956,27 Aluminum Flares are military devices contg pyrotechnic compns which are mixts of finely powdered substances compressed into candles. The most important ingredients in a pyrotechnic compn are the fuel and the oxidizing agent. To these are usually added other materials to intensify the color of the light produced, decrease the burning rate, act as a binder and waterproof the compn... 

Longhorn AAP is involved in the manufacuture of the 4.2 illuminating flares. Two sites, buildings B-7 and 34Y, were selected for dust and electrostatic measurements. In building B-7, 4.2 aluminum candles are processed while, in Building 34-Y, white signal flares are manufactured. 

While solid flares are smoky and therefore subject to wind and other weather conditions, the pyrotechnic system is relatively free of particulare matter and can be made directional. In testing, directional light efficiencies have been increased 12 times by using an aluminum reflector to produce efficiencies of one-quarter to one-half... 

Diisopropylbenzene Hydroperoxide — Fire Hazards Flash Point (deg. F) 175 Flammable Limits in Air (%) Data not available Fire Extinguishing Agents Foam, dry chemical, carbon dioxide Fire Extinguishing Agents Not to be Used Water may be ineffective Special Hazards of Combustion Products Flammable alcohol and ketone gases are formed in fires Behavior in Fire Burns with a flare effect. Containers may explode Ignition Temperature (deg. F) Data not available Electrical Hazard Data not available Burning Rate Data not available Chemical Reactivity Reactivity with Water No reaction Reactivity with Common Materials Aluminum, copper, brass, lead, zinc salts. 

An aluminum scrap contg ca 4.3% Cu was, shown to be practically as suitable as specification grade A1 for use in some pyrotechnic flares) C) Davis (1943), 134 158 (Cu powder has been used in manuf of some expls. For example, TNB can be obtd by refluxing for 2 hrs picryl chloride with Cu pdr in hot aq ale and HNDPhA can be obtd by boiling picryl chloride in nitrobenzene soln with Cu pdr for a short time) D) L.H. Eriksen,, PATR s 1325 (1945),... 

The airplane wing-tip flares which were used for signaling during the first World War are good examples23 of aluminum compositions. They were loaded in cylindrical paper cases 4 inches in length and 1% inches in internal diameter. The white light composition consisted of 77 parts of barium nitrate, 13 of flake aluminum, and 5 of sulfur intimately mixed and secured by a binder of shellac, and burned in the cases mentioned, for 1... 

Flare Systems , PATR 3839 (1969) (Limited Distribution) 5) B. Jackson, Jr et al, Substitution of Aluminum for Magnesium as a Fuel... 

Applications of thermal radiation spectroscopy to expins and pyrots are readily apparent. As a consequence of the highly exothermic nature of explns and flares, significant thermal radiation is emitted which can serve to characterize the reaction processes. The photometric properties of pyrots have been treated in Vol 8, P505-R. In practice, thermal radiation characteristics of explns do not always closely approximate black body properties since the system is non-equilibrium in nature and is time dependent. In addition, some pyrotechnically related materials such as aluminum oxide and magnesium oxide behave as gray bodies with emissivities well below unity. For such systems the radiant emission is reduced as shown in Fig 4... 

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