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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 .
In internal ballistics terms, if the base of a projectile is thought of as a piston propelled by the expanding gas, then as barrel length increases the volume swept by the piston also increases, and hence the amount of energy that can be extracted from the gas's burning increases. A longer barrel allows more propellant to be used: 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]
Transitional ballistics, also known as intermediate ballistics, [26] is the study of a projectile's behavior from the time it leaves the muzzle until the pressure behind the projectile is equalized, [27] so it lies between internal ballistics and external ballistics.
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 ...
[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 ...
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]