Wadding is a disc of material used in to mechanical seal gas behind a projectile (a bullet or round shot), or to separate the propellant from loosely packed shots.[ "Glossary of Firearms Terms". ]
Wadding can be crucial to a gun's efficiency, since any gas that leaks past a projectile as it is being fired is wasted. A harder or more carefully designed item which serves this purpose is often called a sabot. Wadding for is typically a small piece of cloth, or cartridge paper wrapping from the cartridge.
Shotguns
In
shotgun shells, the wadding is actually a semi-flexible cup-shaped sabot designed to hold numerous much smaller-diameter sub-projectiles (i.e. shots), and is launched out together as one payload-carrying projectile. This minimizes chaotic collisions of the shots with the bore wall and with each other, allowing the internal ballistics to be more consistent. After leaving the muzzle, the wadding loosens and opens up in flight, allowing the much
density shots to be
released and scattered. The same function is served when shooting
shotgun slug.
Model rockets
Wadding is used in
to protect the
parachute when it ejects. Without the recovery wadding, the parachute would melt because the ejection is by a small solid-fuel engine, which gets so hot that it melts the glue almost immediately.
Effects
Burning wadding may have ignited the fire that led to the explosion that destroyed the
Orient at the Battle of the Nile (
q.v.). The father of Robert Morris, "Financier of the American Revolution," died as the result of being wounded by flying wadding from a ship's gun that was fired in his honor.
[Charles Rappleye (2010). Robert Morris: Financier of the American Revolution. New York: Simon & Schuster, p. 10. .]
See also
External links
