The pot-de-fer was a primitive cannon made of iron. It was used by the French in the Hundred Years' War. The name means "iron pot" in French language. In Italy, pots-de-fer were known as vasi or vasii, meaning "pot" or "vase".
Description
Though occasionally made with
casting bronze, the
pot-de-fer was essentially an iron
bottle with a narrow neck. It was loaded with
gunpowder and an iron arrow-like
Crossbow bolt,
fletching with iron. It is believed that the middle of the bolt was likely wrapped in
leather for a snug fit, necessary to enhance the
thrust from the gaseous
pressure within 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
explosion and 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) ]
Historical uses and mentions
The
pot-de-fer was first depicted in a
manuscript,
De officiis regum of 1326, by Walter de Millimete,
an illuminated manuscript of 1327 that was presented to
Edward III upon his accession to the English throne.
The manuscript shows a large vase lying on a table, with an
man behind it holding a rudimentary
linstock near the bottom (in this case the linstock would have held a red-hot wire, heated in a brazier, rather than a slow match). A bolt, called a garrot, protrudes from the muzzle.
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, ]
The first confirmed usage of a pot-de-fer in Germany was during the Eltz Feud between 1331 and 1337 at a siege of Eltz Castle.[Wilfrid Tittmann; Die Eltzer Büchsenpfeile von 1331–1333. In: Waffen- und Kostümkunde, Band 36 (1994), pp. 117–128, Band 37 (1995), pp. 53–64]
The pot-de-fer was used by the French in the Hundred Years' War in a raid on Southampton and in battles in Périgord, Cambrai, and Le Quesnoy. They may also have been used against the Scottish by the English.
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.[
]
Scholarly 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 Armouries replica and trialled the weapon in 1999. The walls of the chamber were very thick to prevent explosion, leaving a cylindrical caliber 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 kilogram. 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.
See also