Search results
Results from the WOW.Com Content Network
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 ...
It is caused by the fact that the trajectory of the shot as it leaves the gun may not be the same as the initial pointing direction of the muzzle. There may also be further external ballistic effects which may in themselves be a function of the launch parameters of the shot. The components of gun jump are shown in Figure 5. Figure 5.
According to Matalon–Matkowsky–Clavin–Joulin theory, if and are the laminar burning speed and thickness of a planar flame (and =, / be the corresponding flame residence time with , being the thermal diffusivity in the unburnt gas), then the burning speed for the curved flame with respect to the unburnt gas is given by [6] [page needed]
Short-barrel firearms such as handguns necessitate faster-burning propellants to obtain sufficient muzzle energy, while long guns typically use slower-burning propellants. The pressure relationships between propellant chemical reactions and bullet response are described as internal ballistics .
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 .
The simplest approach to harmonic tuning is to concentrate on the ammunition. The internal ballistics of a given cartridge will determine its dwell time, or the time it takes from ignition to exiting the barrel. By experimentally matching the dwell time to the barrel's frequency, the best load for a particular firearm may be found.
Do the holidays set off your allergies? Learn why you might want to wash your Christmas tree to remove pollen, dust, and allergens.
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.