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A green ballistic pendulum Animation of a ballistic pendulum. A ballistic pendulum is a device for measuring a bullet's momentum, from which it is possible to calculate the velocity and kinetic energy. Ballistic pendulums have been largely rendered obsolete by modern chronographs, which allow direct measurement of the projectile velocity.
A ballistic chronograph or gun chronograph is a measuring instrument used to measure the velocity of a projectile in flight, typically fired from a gun or other firearm. The instrument is often useful for tasks such as gauging the utility of a firearm or safety of non-lethal projectiles fired from items such as a paintball gun or BB gun .
In 1844, he invented a device for measuring the flight speed of projectiles at any point of their trajectory. In 1847, Konstantinov created a ballistic rocket pendulum, which would allow to establish a law of changing rocket motion in time. With the help of this device, he was able to determine the influence of the form and design of a rocket ...
The ballistic pendulum was invented in 1742 by English mathematician Benjamin Robins, and published in his book New Principles of Gunnery, which revolutionized the science of ballistics, as it provided the first way to accurately measure the velocity of a bullet. [7] [8] Robins used the ballistic pendulum to measure projectile velocity in two ways.
Benjamin Robins was born in Bath. [1] His parents were Quakers in poor circumstances, and as a result, he received very little formal education. [1] Having come to London on the advice of Dr. Henry Pemberton (1694–1771), who had recognised Robins's talents, [1] for a time he maintained himself by teaching mathematics, but soon devoted himself to engineering and the study of fortification.
where is the angle above the aim angle at which the bullet leaves the barrel, is the time of travel of the bullet in the barrel (because of the acceleration = / the time is longer than / : = /) and L is the distance the bullet travels from its rest position to the tip of the barrel.
External ballistics is the part of the science of ballistics that deals with the behaviour of a non-powered projectile in flight. External ballistics is frequently associated with firearms , and deals with the unpowered free-flight phase of the bullet after it exits the gun barrel and before it hits the target, so it lies between transitional ...
It was invented in 1918 by Alfred Lee Loomis at the U.S. Army's Aberdeen Proving Ground. [1] The method prevalent at the time was the Boulengé chronograph, which relied on the projectile passing through two wire screens. Breaking the first screen would release a rod held by electromagnets.