The "pot-de-fer" was a primitive
cannonmade of iron. It is known as the first metalcannon, and was used by the French in the Hundred Years' War.cite book |author=Tunis, Edwin |title=Weapons: A Pictorial History |publisher=Johns Hopkins University Press |location=Baltimore |year=1999 |pages= |isbn=0-8018-6229-9 |oclc= |doi=] The name means "iron pot" in French. In Italy, "pots-de-fer" were known as "vasi" or "vasii", meaning "pot" or " vase".cite web |url=http://www.hyw.com/books/history/cannon.htm |title=Cannon |accessdate=2008-02-25 |format= |work=]
Though occasionally made with cast
bronze, the "pot-de-fer" was essentially an iron bottlewith a narrow neck. It was loaded with powder and an iron arrow-like bolt, feathered with iron. It is believed that the middle of the bolt was wrapped in leatherfor a snug fit, necessary to enhance the thrustfrom the gaseous pressurewithin the cannon. However, this feature is not shown in manuscript illuminations. The cannon was set off through a small-diameter touchhole, where a red-hot wire could be thrust to set off an explosionand fire the cannon.Manucy, Albert, "Artillery through the Ages: A Short Illustrated History of Cannon", p. 3 (Washington, United States Government Printing Office, 1949; The Minerva Group, new edition 2001) ISBN 0898754461]
Historical uses and mentions
The "pot-de-fer" was first depicted in a
manuscriptby Walter de Milamete,cite book |author= Carman, W.Y. |title=A History of Firearms: From Earliest Times to 1914 |publisher=Dover Publications |location=New York |year= |pages= |isbn=0-486-43390-0 |oclc= |doi=] an illuminated manuscript of 1327 that was presented to Edward IIIupon his accession to the English throne. [cite book |author=Brodie, Fawn McKay; Brodie, Bernard |title=From Crossbow to H-Bomb |publisher=Indiana University Press |location=Bloomington |year=1973 |pages= |isbn=0-253-20161-6 |oclc= |doi=] The manuscript shows a large vase lying on a table, with an armored man behind it holding a hot piece of metal near the bottom. A bolt protrudes from the muzzle, but no wad is shown. Although illustrated in the treatise, no explanation or description was given.Nossov, Konstantin; "Ancient and Medieval Siege Weapons", UK: Spellmount Ltd, 2006, pp 205-208, ISBN 186227343X]
The "pot-de-fer" was used by the French in the
Hundred Years' Warin a raid on Southamptonand in battles in Perigord, Cambrai, and Quesnoy. They may also have been used against the Scottish by the English.cite web |url=http://xenophongroup.com/montjoie/gp_wpns.htm |title=Gunpowder Weapons of the Late Fifteenth Century |accessdate=2008-02-25 |format= |work=]
An early reference to the name in French is as "pot de fer a traire garros" (an iron jug for throwing arrows). [Dana, Charles E., "Notes on Cannon - Fourteenth and Fifteenth Centuries" in "Proceedings of the American Philosophical Society", Vol. 50, No. 199 (May - Aug., 1911), pp. 147-167] Such a 'pot de fer' had a bottle shape, which may have suggested its name.
cholarly interest and research
The unusual vase-like shape of the cannon, coupled with the depicted arrow projectile, caused many modern historians to doubt the efficiency — or even existence — of the weapon. In order to establish these points, researchers at the
Royal Armouriesreconstructed and trialled the weapon in 1999. The walls of the chamber were very thick to prevent explosion, leaving a cylindrical bore which was loaded by a wooden arrow with bronze flights (also reconstructed based on archeological findings), of 135 cm length. Estimating the size of the cannon from the illustrated man standing beside it, the reconstructed cannon was 90 cm long, and 40 cm at its widest point; cast in bronze the reconstruction weighed 410 kg. The subsequent trials showed that the gun was not powerful, firing the arrow only 180 m at most; a larger charge of powder resulted only in the destruction of the arrow.
Battle of Crécy
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