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The poorly ignited charge moved the projectile partially down the tube, increasing the surface area of the propellant. The increased surface area of the propellant then ignited in the tube, raising pressures in parts of the gun not designed for them. The large overpressure caused "catastrophic tube failure" (an explosion destroying the gun tube ...
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For this purpose the charges in such guns are ignited by "vent-sealing tubes." For muzzle loaded guns and small breech loading guns radially vented, especially those using black powder, the amount of erosion in the vent is not so serious. The charge is fired by ordinary friction primers, which are blown away by the escape of gas through the vent.
Firearms using gunpowder could be loaded using a small scoop or charge cup to determine the correct amount for each shot. Some early smokeless propellants called bulk propellants were designed for a similar volume and reaction rate as gunpowder, but most modern smokeless powders have improved efficiency offering more energy from smaller charges. [1]
On top of that, the oil producer plans to ramp its annual share repurchase rate from $5 billion to $7 billion, with the aim of buying back over $20 billion in stock in the first three years ...
The self-igniting storeable liquid bi-propellants have somewhat lower specific impulse than LOX/kerosene but have higher density so a greater mass of propellant can be placed in the same sized tanks. Gasoline was replaced by different hydrocarbon fuels, [7] for example RP-1 – a highly refined grade of kerosene. This combination is quite ...
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In the current economic environment, many retailers are struggling. While unemployment remains low and growth in gross domestic product (GDP) has been solid, the past few years of high inflation ...