Paixhans gun
Encyclopedia
The Paixhans gun was the first naval gun
Naval artillery
Naval artillery, or naval riflery, is artillery mounted on a warship for use in naval warfare. Naval artillery has historically been used to engage either other ships, or targets on land; in the latter role it is currently termed naval gunfire fire support...

 designed to fire explosive shells. It was developed by the French general Henri-Joseph Paixhans
Henri-Joseph Paixhans
Henri-Joseph Paixhans was a French artillery officer of the beginning of the 19th century.Henri-Joseph Paixhans graduated from the École Polytechnique...

 in 1822-1823.

Background

Explosive shells had long been in use in ground warfare (in howitzer
Howitzer
A howitzer is a type of artillery piece characterized by a relatively short barrel and the use of comparatively small propellant charges to propel projectiles at relatively high trajectories, with a steep angle of descent...

s and mortars), but they were only fired at high angles and with relatively low velocities. Shells are inherently dangerous to handle, and no solution had been found yet to combine the explosive character of the shells with the high power and flatter trajectory of a high velocity gun.

However, before the advent of radar and modern optical controlled firing, high trajectories were not practical for marine combat. Naval combat essentially required flat-trajectory guns in order to have some decent odds of hitting the target. Therefore naval warfare had consisted for centuries in encounters between flat-trajectory cannons using inert cannonballs, which could inflict only local damage even on wooden hulls.

Mechanism

Paixhans advocated the usage of flat-trajectory shell guns against warships in 1822 in his Nouvelle force maritime et artillerie.

Paixhans developed a delaying mechanism which, for the first time, allowed shells to be fired safely in high-powered flat-trajectory guns. The effect of explosive shells lodging into wooden hulls and then detonating, was potentially devastating. This was first demonstrated by Henri-Joseph Paixhans in trials against the two-decker Pacificateur
French ship Pacificateur (1811)
The Pacificateur was an 80-gun Bucentaure-class 80-gun ship of the line of the French Navy, designed by Sané. She is notable for being the first ship to sustain damage from Paixhans shells....

 in 1824, in which he successfully broke up the ship. Two prototype Paixhans guns had been founded in 1823 and 1824 for this test. Paixhans reported the results in Experiences faites sur une arme nouvelle. The shells were equipped with a fuse which ignited automatically when the gun was fired. The shell would then lodge itself in the wooden hull of the target, before exploding a moment later:
The first Paixhans guns for the French Navy
French Navy
The French Navy, officially the Marine nationale and often called La Royale is the maritime arm of the French military. It includes a full range of fighting vessels, from patrol boats to a nuclear powered aircraft carrier and 10 nuclear-powered submarines, four of which are capable of launching...

 were founded in 1841. The barrel of the guns weighed about 10,000 pounds, and proved accurate to about two miles. In the 1840s, France, England, Russia and the United States adopted the new naval guns.

The effect of the guns in an operational context was first demonstrated during the actions at Eckernförde in 1849 during the Danish-Prussian War
First War of Schleswig
The First Schleswig War or Three Years' War was the first round of military conflict in southern Denmark and northern Germany rooted in the Schleswig-Holstein Question, contesting the issue of who should control the Duchies of Schleswig and Holstein. The war, which lasted from 1848–1851,...

, and especially at the Battle of Sinop
Battle of Sinop
The Battle of Sinop, or the Battle of Sinope, took place on 30 November 1853 at Sinop, a sea port in northern Anatolia, when Imperial Russian warships struck and annihilated a patrol force of Ottoman ships anchored in the harbor...

 in 1853 during the Crimean War
Crimean War
The Crimean War was a conflict fought between the Russian Empire and an alliance of the French Empire, the British Empire, the Ottoman Empire, and the Kingdom of Sardinia. The war was part of a long-running contest between the major European powers for influence over territories of the declining...

.

According to the Penny Cyclopaedia
Penny Cyclopaedia
The Penny Cyclopædia of the Society for the Diffusion of Useful Knowledge was a multi-volume encyclopedia edited by George Long and published by Charles Knight alongside the Penny Magazine. The volumes were published from 1833 to 1843.-External links:...

 (1858):

France

In 1827 the French navy ordered fifty large guns on the Paixhans model from the arsenals at Ruelle and at Indret near Nantes
Nantes
Nantes is a city in western France, located on the Loire River, from the Atlantic coast. The city is the 6th largest in France, while its metropolitan area ranks 8th with over 800,000 inhabitants....

. The gun chosen, the canon-obusier de 80, was so called because it was of the 22 cm bore diameter which would have fired an 80 pound solid shot. The gun barrel weighed 3600 kg and was the bore was of 223 mm diameter and 2.8 m long, firing a shell weighing 23.12 kg. The guns were produced slowly and were tested afloat through the 1830s. They formed a small part of the armament on larger ships, with two or four guns only being carried, although on smaller, experimental steam vessels they, and the much larger canon-obusier de 150, of 27 cm bore, were proportionately more important, the paddle steamer
Paddle steamer
A paddle steamer is a steamship or riverboat, powered by a steam engine, using paddle wheels to propel it through the water. In antiquity, Paddle wheelers followed the development of poles, oars and sails, where the first uses were wheelers driven by animals or humans...

 Météore, for example, carrying three canon-obusier de 80 pieces and six small carronades in 1833. Alongside the large guns which Paixhans had called for, the French navy also used a smaller shell gun, of the same 164 mm bore as its standard solid shot-firing 30 pounder guns and carronades, in larger numbers with first rate ships carrying over 30 of these guns.

United States

The United States Navy
United States Navy
The United States Navy is the naval warfare service branch of the United States Armed Forces and one of the seven uniformed services of the United States. The U.S. Navy is the largest in the world; its battle fleet tonnage is greater than that of the next 13 largest navies combined. The U.S...

 adopted the design, and equipped several ships with 8-inch guns of 63 and 55 cwt. in 1845, and later a 10-inch shell gun of 86 cwt. Paixhans guns were used on the USS Constitution
USS Constitution
USS Constitution is a wooden-hulled, three-masted heavy frigate of the United States Navy. Named by President George Washington after the Constitution of the United States of America, she is the world's oldest floating commissioned naval vessel...

 (4 Paixhans guns) in 1842, under the command of Foxhall A. Parker, Sr.
Foxhall A. Parker, Sr.
Foxhall Alexander Parker, Sr. was an officer in the United States Navy.- Biography :Born in Westmoreland County, Virginia, Parker joined the Navy as a midshipman on January 1, 1808. During the War of 1812 he was captured at sea...

, and were also present onboard the USS Mississippi
USS Mississippi (1841)
USS Mississippi, a paddle frigate, was the first ship of the United States Navy to bear that name. She was named for the Mississippi River. Her sister ship was . Her keel was laid down by the Philadelphia Navy Yard in 1839; built under the personal supervision of Commodore Matthew Perry. She was...

 (10 Paixhans guns), and the USS Susquehanna
USS Susquehanna (1847)
USS Susquehanna, a sidewheel steam frigate, was the first ship of the United States Navy to be named for a river which rises in Lake Otsego in central New York and flows across Pennsylvania and the northeast corner of Maryland to empty into the Chesapeake Bay.Her keel was laid down by the New York...

 (6 Paixhans guns) during Commodore Perry's mission to open Japan in 1853.

The Dahlgren gun
Dahlgren gun
Dahlgren guns were muzzle loading naval artillery designed by Rear Admiral John A. Dahlgren USN, mostly used in the period of the American Civil War. Dahlgren's design philosophy evolved from an accidental explosion in 1849 of a 32-pounder being tested for accuracy, killing a gunner...

 was developed by John A. Dahlgren
John A. Dahlgren
John Adolphus Bernard Dahlgren was a United States Navy leader. He headed the Union Navy's ordnance department during the American Civil War and designed several different kinds of guns and cannons that were considered part of the reason the Union won the war...

 in 1849 to supersede Paixhans guns:


Russia

The Russian Navy was the first to use the guns extensively in combat. At the Battle of Sinop
Battle of Sinop
The Battle of Sinop, or the Battle of Sinope, took place on 30 November 1853 at Sinop, a sea port in northern Anatolia, when Imperial Russian warships struck and annihilated a patrol force of Ottoman ships anchored in the harbor...

 in 1853, Russian ships attacked and annihilated a Turkish fleet with their Paixhans explosive shell guns. The shell penetrated deep inside the wooden planking of Turkish ships, exploding and igniting the hulls.
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