Charge manufacture, propellant

Gunpowder was supplied in pellet form as a propellant and the substitutes were similarly manufactured. They were therefore called powders. Subsequent developments have led to the provision of propellent explosives in special and often massive form. Nevertheless, the term powder is still retained for their nomenclature, and the individual unit of the charge, no matter how large, is still called a grain. 

Secondary high explosive, Originally developed as a military propellant. Used by terrorists as main charge Secondary high explosive. By-product of RDX manufacture, Used in Shock Tube (i.e., Nonel)... 

Steps in Propellant Grain Manufacture. The manufacture of a propellant charge proceeds by the steps depicted in Figure 11. 

Blackpowder for the manufacture of propellent charges has long been obsolete although some types are still produced for other purposes. Thus the French cube powder, poudre C or poudre SP, is employed as an igniter in bag cartridges. 

THE TECHNOLOGY OF THE MANUFACTURE OF ROCKET CHARGES CONTA NIG COMPOSITE PROPELLANTS WITH THIOKOL... 

It is characteristic of the technology of the manufacture of rocket charges containing composite propellants with thiokol that the semi-liquid mixture is poured directly into the rocket chamber lined from within with an insulating layer to which the charge adheres tightly ( case-bonded charge). This is a very cheap and rapid method of manufacture. 

The final operation in propellant manufacture is the curing of the binder. The shaped material is placed in a curing oven for 16-48 hr at 80-110°C. The temperature and duration of this operation depend on the composition of the mixture, the dimensions of the charge and the physical properties desired. 

Substances inhibiting the development of the secondary flame are those which inhibit burning reactions. The strongest of the substances known to possess this property is the potassium ion. Its ability to prevent the development of a secondary flame was demonstrated by Dautriche [39] as early as 1908. Since then potassium nitrate has been employed in the manufacture of flash-reducing charges added to the charges of ordinary propellant. 

The difficulty in the manufacture of large grains may be overcome by substituting the classical method for the extrusion of powder by a novel technique whereby cast charges of double base propellant are produced. 

The disadvantages of smokeless powder as a rocket propellant, the difficulty in manufacturing very large charges and the high operating expenses led to a search for explosives based upon another principle plastomers or elastomers with an oxygen carrier. 

Winchester. US small arms manufacturer. Oliver Winchester (1810—1880) was a prosper-our shirt-maker who had some capital invested in the Volcanic Arms Co in 1855. The company made a lever-action rifle which used an odd self-contained cartridge which was simply an elongated bullet with the propelling charge in... 

Propellants are frequently referred to as gunpowder, powder charge, or simply as charge or powder. However, they are very rarely a true powder and are manufactured in a wide range of colors, shapes, and sizes. Figure 10.1 illustrates some shapes. 

Use Intermediate in the manufacture of other high explosives, and as an ingredient in demolition charges, and rocket propellants—increase thrust by providing chlorine, but increases smoke trails. ... 

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