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This graph shows different pressure curves for powders with different burn rates. The leftmost graph is the same as the large graph above. The middle graph shows a powder with a 25% faster burn rate, and the rightmost graph shows a powder with a 20% slower burn rate. Energy is the ability to do work on an object. Work is force applied over a ...
Internal ballistics: A subfield of ballistics, that is the study of a projectile's behavior from the time its propellant's igniter is initiated until it exits the gun barrel. The study of internal ballistics is important to designers and users of firearms of all types, from small-bore Olympic rifles and pistols , to high-tech artillery .
[4]: 125 The motion and behavior characteristics of projectiles while under the influence of the gases produced by the propellant is known as internal ballistics. [ 13 ] Due to the relatively short distance a gun barrel can offer, the sealed acceleration time is very limited and only a small proportion of the total energy generated by the ...
The grain burns at a predictable rate, given its surface area and chamber pressure. [citation needed] [17] The chamber pressure is determined by the nozzle throat diameter and grain burn rate. Allowable chamber pressure is a function of casing design. The length of burn time is determined by the grain "web thickness". [clarification needed]
It was quickly discovered that the rate of burning could be varied by altering the surface area of the cordite. Narrow rods were used in small-arms and were relatively fast burning, while thicker rods would burn more slowly and were used for longer barrels, such as those used in artillery and naval guns. [citation needed]
For example, the prediction of shot band forces, or the bending stresses in long rod penetrators, gives added confidence to the strength of design process. Simulations in a single plane (2 dimensional) can be used to give limited appreciation with certain systems, but for a full understanding a full 3-dimensional analysis is important.
The QuickLOAD interior ballistics predictor program also contains the external ballistics predictor computer program QuickTARGET. QuickTARGET is based on the Siacci/Mayevski G1 model and gives the user the possibility to enter several different BC G1 constants for different speed regimes to calculate ballistic predictions that more closely ...
Rangekeeping is an excellent example of the application of analog computing to a real-world mathematical modeling problem. Because nations had so much money invested in their capital ships , they were willing to invest enormous amounts of money in the development of rangekeeping hardware to ensure that the guns of these ships could put their ...