Pot-de-fer

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For the French commune, see Carville-Pot-de-Fer
A pot-de-fer, as shown by the Milamete manuscript.
A pot-de-fer, as shown by the Milamete manuscript.

The pot-de-fer was a primitive cannon made of iron. It is known as the first metal cannon, and was used by the French in the Hundred Years' War.[1] The name means "iron pot" in French. In Italy, pots-de-fer were known as vasi or vasii, meaning "pot" or "vase".[2][3]

Contents

[edit] Description

Though occasionally made with cast bronze, the pot-de-fer was essentially an iron [2] bottle with 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 leather for a snug fit, necessary to enhance the thrust from the gaseous pressure within the cannon.[3] 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.[1][4]

[edit] Historical uses and mentions

The pot-de-fer was first depicted in a manuscript by Walter de Milamete,[5] an illuminated manuscript of 1327 that was presented to Edward III upon his accession to the English throne.[6] 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.[5] Although illustrated in the treatise, no explanation or description was given.[7]

The pot-de-fer was used by the French in the Hundred Years' War in a raid on Southampton and in battles in Perigord, Cambrai, and Quesnoy. They may also have been used against the Scottish by the English.[2]

An early reference to the name in French is as pot de fer a traire garros (an iron jug for throwing arrows).[8] Such a 'pot de fer' had a bottle shape, which may have suggested its name.[4]

[edit] Scholarly interest and research

Reconstruction of a pot-de-fer.
Reconstruction of a pot-de-fer.

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.[7] In order to establish these points, researchers at the Royal Armouries reconstructed 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. [7]

[edit] References

  1. ^ a b Tunis, Edwin (1999). Weapons: A Pictorial History. Baltimore: Johns Hopkins University Press. ISBN 0-8018-6229-9. 
  2. ^ a b c Gunpowder Weapons of the Late Fifteenth Century. Retrieved on 2008-02-25.
  3. ^ a b Cannon. Retrieved on 2008-02-25.
  4. ^ a b 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
  5. ^ a b Carman, W.Y.. A History of Firearms: From Earliest Times to 1914. New York: Dover Publications. ISBN 0-486-43390-0. 
  6. ^ Brodie, Fawn McKay; Brodie, Bernard (1973). From Crossbow to H-Bomb. Bloomington: Indiana University Press. ISBN 0-253-20161-6. 
  7. ^ a b c Nossov, Konstantin; Ancient and Medieval Siege Weapons, UK: Spellmount Ltd, 2006, pp 205-208, ISBN 186227343X
  8. ^ 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

[edit] See also