Anvil firing (also known as an anvil launching or an anvil shooting^[1]) is the practice of firing an anvil into the air with gunpowder.

Typically, two anvils are used: one as a base (placed upside down), and another one (also known as the "flier") as the projectile (placed right-side up, atop the base).^[2] Alternatively, a single anvil can be fired from a stone base. The space formed by the anvil's concave base is filled with black powder (not modern gunpowders, which have much higher energy densities) and a fuse is made to project out. The fuse is lit, and the resulting deflagration (the rapid combustion of the powder rather than detonation) sends the projectile anvil several feet into the air.

An alternative method is to place the bottom anvil right side up, and fill the hardy hole with black powder. A torus or washer, often made from a playing card, is placed over the hole, with a space for a fuse or powder trail. The top anvil is placed upside down, face to face with the bottom anvil.^[3]

Anvil firing was once commonly performed in the Southern United States as a substitute for fireworks during celebrations. One such noteworthy celebration was held on the day the state of Texas voted to secede from the Union. On February 23, 1861, Texas Ranger and prominent Union supporter, Thomas Lopton Campbell Jr., was held captive and forced to "fire the anvils" in the streets of Austin.^[4]

Anvils were also traditionally fired on St. Clement's Day, honoring Pope Clement I, the patron saint of blacksmiths and metalworkers.^[5]

Although its practice has lessened in recent years, enthusiasts still participate in anvil launching events and competitions.

Dangers

Individuals may be crushed by a falling anvil. The black powder can also prematurely ignite when the top anvil is placed, which can cause black marks on any nearby individuals.

As in any case where an explosive is confined on all sides by metal, shrapnel presents a hazard. If a damaged or structurally weak anvil is used, the anvil base may shatter upon ignition.

Physics and Chemistry

The technique depends on the fact that black powder is a low explosive, which burns more rapidly when under pressure. ^[6]

Historical uses

A 21 anvil salute replaced the traditional 21 gun salute on Victoria Day 1860 in New Westminster, British Columbia, after the town's cannon and status as capital of British Columbia was taken away.^[7]

Sources

References

External links

pt:Disparo de bigorna