Definition

1. Noun:
   • A ballistic pendulum consisting of a suspended gun: A "gun pendulum" is a scientific apparatus used historically to measure the velocity of a projectile. It consists of a firearm that is freely suspended like a pendulum. When the gun is fired, the velocity of the projectile is calculated by measuring the recoil swing of the gun itself.

Usage Examples

• Noun:
  • The 19th-century physicist used a gun pendulum to determine the muzzle velocity of the new rifle cartridge.
  • Accurate measurements from the gun pendulum helped in the study of ballistics.

Advanced Usage

• As a historical scientific instrument: The term is primarily used in historical or technical contexts describing early ballistic measurement techniques.
  • Before modern chronographs, the gun pendulum was a standard tool for ballisticians.

Variants and Related Words

• Ballistic pendulum (n): The broader category of pendulum devices used to measure projectile momentum, of which the gun pendulum is a specific type.
  • The gun pendulum is a specialized form of the ballistic pendulum.

Synonyms

• Ballistic pendulum (when the pendulum mass is the firearm itself).

Notes on Meaning

• The "gun pendulum" refers specifically to the apparatus where the is the pendulum bob. It is distinct from a ballistic pendulum where a separate block catches the projectile. The key measurement is derived from the gun's recoil motion after firing.

Noun

1. a ballistic pendulum consisting of a suspended gun; the velocity of a projectile in the bore of a gun can be measured by the recoil when the gun is discharged