Ballistics: Fundamentals of Ballistics 1948 US Army Training Film

• Report rights infringement
• published: 12 Oct 2015
• views: 18900

more at http://quickfound.net/links/military_news_and_links.html "PRINCIPLES OF PHYSICS INVOLVED IN DESIGN AND FUNCTIONING OF WEAPONS AND AMMUNITION, WITH PARTICULAR REFERENCE TO THEIR ARTILLERY APPLICATION." US Army training film TF9-1512 US Army Training Film playlist: https://www.youtube.com/playlist?list=PL0C7C6CCF1C0DEBB3 Small Arms playlist: https://www.youtube.com/playlist?list=PL22A5611941174745 Reupload of a previously uploaded film, in one piece instead of multiple parts, and with improved video & sound. Public domain film from the US National Archives, slightly cropped to remove uneven edges, with the aspect ratio corrected, and one-pass brightness-contrast-color correction & mild video noise reduction applied. The soundtrack was also processed with volume normalization, noise reduction, clipping reduction, and/or equalization (the resulting sound, though not perfect, is far less noisy than the original). http://creativecommons.org/licenses/by-sa/3.0/ http://en.wikipedia.org/wiki/Ballistics Ballistics (gr. βάλλειν ('ba'llein'), "throw") is the science of mechanics that deals with the flight, behavior, and effects of projectiles, especially bullets, gravity bombs, rockets, or the like; the science or art of designing and accelerating projectiles so as to achieve a desired performance. A ballistic body is a body which is free to move, behave, and be modified in appearance, contour, or texture by ambient conditions, substances, or forces, as by the pressure of gases in a gun or propulsive nozzle, by rifling in a barrel, by gravity, by temperature, or by air particles. A ballistic missile is a missile only guided during the relatively brief initial powered phase of flight, whose course is subsequently governed by the laws of classical mechanics. Modern inter-continental ballistic missiles (ICBMs), contain a maneuverable orbiting bus that positions and releases ballistic warheads in space using celestial navigation. Gun ballistics Gun ballistics is the work of projectiles from the time of shooting to the time of impact with the target. Gun ballistics is often broken down into the following four categories, which contain detailed information on each category: Internal ballistics (sometimes called interior ballistics): the study of the processes originally accelerating the projectile, for example the passage of a bullet through the barrel of a rifle. Transition ballistics (sometimes called intermediate ballistics): the study of the projectile's behavior when it leaves the barrel and the pressure behind the projectile is equalized. External ballistics (sometimes called exterior ballistics): the study of the passage of the projectile through a medium, most commonly earth's atmosphere. Terminal ballistics: the study of the interaction of a projectile with its target, whether that be flesh (for a hunting bullet), steel (for an anti-tank round), or even furnace slag (for an industrial slag disruptor). http://en.wikipedia.org/wiki/Internal_ballistics Internal ballistics, a subfield of ballistics, is the study of a projectile's motion 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. Hatcher breaks the duration of interior ballistics into 3 parts: - Lock time, the time from sear release until the primer is struck - Ignition time, the time from when the primer is struck until the projectile starts to move - Barrel time, the time from when the projectile starts to move until exits the barrel. These times have significance for accuracy. If the weapon is moving, then a shorter lock time minimizes the effect of that motion. The consistency of the ignition and barrel times affect and relate to the muzzle velocity. There are many processes that are significant. The source of energy is the burning propellant. It generates hot gases that raise the chamber pressure. That pressure pushes on the base of the projectile, and causes the projectile to accelerate. The chamber pressure depends on many factors. The amount of propellant that has burned, the temperature of the gases, and the volume of the chamber. The burn rate of the propellant depends not only chemical makeup, but also the shape of the propellant grains. The temperature depends not only on the energy released, but also the heat lost to the sides of the barrel and chamber. The volume of the chamber is continuously changing: as the propellant burns, there is more volume for the gas to occupy. As the projectile travels down the barrel, the volume behind the projectile also increases...

Ballistics: Fundamentals of Ballistics 1948 US Army Training Film

• Report rights infringement
• published: 12 Oct 2015
• views: 18900

more at http://quickfound.net/links/military_news_and_links.html "PRINCIPLES OF PHYSICS INVOLVED IN DESIGN AND FUNCTIONING OF WEAPONS AND AMMUNITION, WITH PARTICULAR REFERENCE TO THEIR ARTILLERY APPLICATION." US Army training film TF9-1512 US Army Training Film playlist: https://www.youtube.com/playlist?list=PL0C7C6CCF1C0DEBB3 Small Arms playlist: https://www.youtube.com/playlist?list=PL22A5611941174745 Reupload of a previously uploaded film, in one piece instead of multiple parts, and with improved video & sound. Public domain film from the US National Archives, slightly cropped to remove uneven edges, with the aspect ratio corrected, and one-pass brightness-contrast-color correction & mild video noise reduction applied. The soundtrack was also processed with volume normalization, noise reduction, clipping reduction, and/or equalization (the resulting sound, though not perfect, is far less noisy than the original). http://creativecommons.org/licenses/by-sa/3.0/ http://en.wikipedia.org/wiki/Ballistics Ballistics (gr. βάλλειν ('ba'llein'), "throw") is the science of mechanics that deals with the flight, behavior, and effects of projectiles, especially bullets, gravity bombs, rockets, or the like; the science or art of designing and accelerating projectiles so as to achieve a desired performance. A ballistic body is a body which is free to move, behave, and be modified in appearance, contour, or texture by ambient conditions, substances, or forces, as by the pressure of gases in a gun or propulsive nozzle, by rifling in a barrel, by gravity, by temperature, or by air particles. A ballistic missile is a missile only guided during the relatively brief initial powered phase of flight, whose course is subsequently governed by the laws of classical mechanics. Modern inter-continental ballistic missiles (ICBMs), contain a maneuverable orbiting bus that positions and releases ballistic warheads in space using celestial navigation. Gun ballistics Gun ballistics is the work of projectiles from the time of shooting to the time of impact with the target. Gun ballistics is often broken down into the following four categories, which contain detailed information on each category: Internal ballistics (sometimes called interior ballistics): the study of the processes originally accelerating the projectile, for example the passage of a bullet through the barrel of a rifle. Transition ballistics (sometimes called intermediate ballistics): the study of the projectile's behavior when it leaves the barrel and the pressure behind the projectile is equalized. External ballistics (sometimes called exterior ballistics): the study of the passage of the projectile through a medium, most commonly earth's atmosphere. Terminal ballistics: the study of the interaction of a projectile with its target, whether that be flesh (for a hunting bullet), steel (for an anti-tank round), or even furnace slag (for an industrial slag disruptor). http://en.wikipedia.org/wiki/Internal_ballistics Internal ballistics, a subfield of ballistics, is the study of a projectile's motion 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. Hatcher breaks the duration of interior ballistics into 3 parts: - Lock time, the time from sear release until the primer is struck - Ignition time, the time from when the primer is struck until the projectile starts to move - Barrel time, the time from when the projectile starts to move until exits the barrel. These times have significance for accuracy. If the weapon is moving, then a shorter lock time minimizes the effect of that motion. The consistency of the ignition and barrel times affect and relate to the muzzle velocity. There are many processes that are significant. The source of energy is the burning propellant. It generates hot gases that raise the chamber pressure. That pressure pushes on the base of the projectile, and causes the projectile to accelerate. The chamber pressure depends on many factors. The amount of propellant that has burned, the temperature of the gases, and the volume of the chamber. The burn rate of the propellant depends not only chemical makeup, but also the shape of the propellant grains. The temperature depends not only on the energy released, but also the heat lost to the sides of the barrel and chamber. The volume of the chamber is continuously changing: as the propellant burns, there is more volume for the gas to occupy. As the projectile travels down the barrel, the volume behind the projectile also increases...