Recurve bow

Inarchery,arecurve bowis one of the mainshapesabowcan take, with limbs that curve away from the archer when unstrung. A recurve bow stores more energy and delivers energy more efficiently than the equivalent straight-limbed bow, giving a greater amount of energy and speed to thearrow.A recurve will permit a shorter bow than the simple straight limb bow for given arrow energy, and this form was often preferred by archers in environments where long weapons could be cumbersome, such as in brush and forest terrain, or whileon horseback.

Recurved limbs also put greater stress on the materials used to make the bow, and they may make more noise with the shot. Extreme recurves make the bow unstable when being strung. An unstrung recurve bow can have a confusing shape and manyNative Americanweapons, when separated from their original owners and cultures, were incorrectly strung backwards and destroyed when attempts were made to shoot them.^[1]A test performed by Hepworth and Smith in 2002 of a preparation manufactured from bovine tendon andpearl glueand used in traditional Asiatic recurve bows showed that the composite "was found to absorb 18 MJ/m³of energy to failure, comparable tocarbon fibrecomposites,spring steelandbutyl rubber."^[2]

Historical use

Recurve bows made out ofcomposite materialswere used by, among other groups, thePersians,Parthians,Sarmatians,Scythians,Alans,Dacians,Cumans,Hyksos,Magyars,Huns,Bulgars,Greeks,Turks,Mongols,KoreansandChinese.

The recurve bow spread to Egypt and much of Asia in the second millennium BC.

Perhaps the most ancient written record of the use of recurved bows is foundPsalm 78:57 ( "They were turned aside like a deceitful bow" KJV), which is dated by most scholars to the eighth century BC.^[3]

19th century Bible scholarAdam Clarkepointed out that "If a person, who is unskillful or weak, attempt to recurve and string one of these bows, if he take not great heed, it will spring back, and regain its quiescent position; and, perhaps, break his arm. And sometimes I have known it, when bent, to start aside, - regain its quiescent position, to my no small danger... this is precisely the kind of bow mentioned byHomer,Odyssey xxi, which none ofPenelope's suitors could bend, called καμπυλα τοξα [kampula toxa] in the state of rest; but τοξον παλιντονον [toxon palintonon], the recurved bow when prepared for use. "^[4]

The standard weapon of Roman imperial archers was a composite recurve, and the stiffening laths (also called siyah in Arabic/Asian bows^[5]andszarv(horns) in Hungarian bows) used to form the actual recurved ends have been found on Roman sites throughout the Empire, as far north asBar Hill Forton theAntonine Wallin Scotland.^[6]

The Turkish archer used recurve bows, which were manufactured from laminates of wood glued with animal tissue like horn and sinew, to great destructive effect during the reign of theOttomans.^[7]

Its use by theMongol armiesallowed massed individuals on horseback to raid from the Pacific to central Europe, thanks to the relatively short length of recurve bows, with which archers could maneuver while seated on their mount.^[8]^[9]The rise of the Mongols can be partially attributed to the good range and power of the bows of Genghis Khan's armies. These bows were made of a bamboo core, withhornon the belly (facing towards the archer) andsinewon the back, bound together withanimal glue.^[10]

During theMiddle Agescomposite recurve bows were used in the drier European countries because the laminate glue would not moisten and thereby lose its adhesive power; the all-wooden straightlongbowwas the normal form in wetter areas. Recurve bows depicted in the British Isles (see illustrations in "The Great War Bow" )^[11]may have been composite weapons, or wooden bows with ends recurved by heat and force, or simply artistic licence.

The bows of manyIndigenous North Americanwere recurved, especially West Coast Indian bows.

Recurve bows went out of widespread use in warfare with thegreater availability of effective firearmsin various nations at the end of the 19th century.

In Ancient China, recurve bow had a long history in battles. During the battle between the Song dynasty and the state of Liao Jin, the utilization of recurve bows was widely recorded. During Ming Dynasty, a deeper modification was applied and named as Ming-style recurve bow.^[12]

Modern use

Self bows,composite bows,andlaminated bowsusing the recurve form are still made and used by bowyers, amateurs, and professional archers.

The unqualified phrase "recurve bow" or just "a recurve" in modern archery circles usually refers to a typical modern recurve bow, as used by archers in theOlympicsand many other competitive events. It employs advanced technologies and materials. The limbs are usually made frommultiple layersoffibreglass,carbon and/or wood on a core of carbon foam or wood. The riser (the centre section of the bow) is generally separate and is constructed from wood, carbon,aluminium alloyormagnesium alloy.The term 'riser' is used because, in a one-piece bow, the centre section rises from the limbs in a taper to spread the stress. Several manufacturers produce risers made ofcarbon fibre(with metal fittings) or aluminium with carbon fibre. Risers for beginners are usually made of wood or plastic. The synthetic materials allow economic, predictable manufacture for consistent performance. The greater mass of a modern bow is in itself an aid to stability, and therefore to accuracy. However, accuracy is also related to a bow's draw weight, as well as how well an archer handles it. It is therefore imperative for an archer, particularly a beginner, never to overestimate their capabilities, and to choose a draw weight that is appropriate for their body build and level of experience.^[13]

The modern recurve is the only form of bow permitted in the Olympics (though thecompound bowis permitted in some categories at theParalympic Games) and is the most widely used by European and Asian sporting archers.

There is a movement to have future Olympic Games include the compound bow in competition, due to its framework technology being more available and widespread, which would make competitive stat-tracking and testing easier.^[14]

The modern Olympic-style recurve is a development of the Americanflatbow,with rectangular-section limbs that taper towards the limb tips. Most recurves today are "take-down" bows; that is, the limbs can be detached from the riser, for ease of transportation and storage as well as interchangeability. Older recurves and some modern hunting recurves are one-piece bows. Hunters often prefer one-piece bows over take-down bows, because the limb pockets on take-down bows can make unwanted noise while drawing.

Barebow is another type of modern recurve bow. It usually uses the same riser and limbs as a recurve, but lacks a sight, stabilizers, and clicker. While they may still look similar, it is tuned differently with a negative tiller and a different weight distribution. This is due to the archer's anchor point being on the corner of the mouth instead of below the chin.

Terminology

Arrow rest: Where the arrow rests during draw. These may be simple fixed rests or may be spring-loaded or magnetic flip rests.
Back: The face of the bow on the opposite side to the string
Belly: The face of the bow on the same side as the string
Bow sight: An aiming aid attached to the riser
Brace height: The distance between the deepest part of the grip and the string;fistmeleis the traditional term, referring to the equivalent length of a closed fist with the thumb extended, indicating the proper traditional distance used between the deepest part of the grip and the string.
Grip: The part of the bow held by the bow hand
Limbs: The upper and lowerworking partsof the bow, which come in a variety of different poundages
Nocking point: The place on the bowstring where the arrownockis fitted
Riser: The rigid centre section of a bow to which the limbs are attached
String: The cord that attaches to both limb tips and transforms stored energy from the limbs into kinetic energy in the arrow
Sling: A strap or cord attached to the bow handle, wrist or fingers to prevent the bow from falling from the hand
Finger taborthumb ring: A protection for the fingers that draw the string. Can also provide a better release performance. Usually made of leather.
Tiller: The difference between the limb-string distances measured where the limbs are attached to the riser. Usually the upper distance is slightly more than the bottom one, resulting in apositivetiller. Reflects the power-balance between both limbs.

Other equipment

Archers often have many other pieces of equipment attached to their recurve bows, such as:

Clicker: a blade or wire device fitted to the riser, positioned to drop off the arrow when the archer has reached optimum draw length. Used correctly, this ensures the same cast-force each time. Many archers train themselves to shoot automatically when the clicker 'clicks' off the arrow.
Kisser: a button or nodule attached to the bowstring. The archer touches the kisser to the same spot on the face each time (usually the lips, hence the name) to give a consistent vertical reference.
Plunger button: a fine-tuning device consisting of a spring-cushioned tip inside a housing. The plunger button screws through the riser so that the tip emerges above the rest. The side of the arrow is in contact with the tip when the arrow is on the rest. The spring is tuned so that it allows a certain amount of movement of the arrow towards the riser on release, bringing the arrow to the ideal "centre shot" location. The plunger button is used to compensate for the arrow's flex since the arrow flexes as the string pushes onto it with a very high acceleration. The device is also known as a cushion plunger, pressure button, or Berger button.
Stabilizers: weight-bearing rods attached to a recurve bow to balance the bow to the archer's liking, and to dampen the effect oftorqueand dissipate vibration.

References

^American Indian Archery. Reginald Laubin, Gladys Laubin. University of Oklahoma Press 1980.ISBN 0-8061-1467-3ISBN 978-0-8061-1467-5
^Hepworth, D.G.; Smith, J.P. (2002). "The mechanical properties of composites manufactured from tendon fibres and pearl glue (Animal glue)".Composites Part A: Applied Science and Manufacturing.33(6): 797–803.doi:10.1016/S1359-835X(02)00025-8.
^W. Stewart McCullough, The Interpreter's Bible, Volume IV, 1955, Parthenon Press, Nashville, 51-12276, p. 415
^Adam Clarke, Commentary on the Bible, 1831, Emory and Waugh, NY, volume III p. 244
^R.P.Elmer 'Target Archery'
^Coulston JC. 'Roman Archery Equipment', in M.C. Bishop (ed.), The Production and Distribution of Roman Military Equipment. Proceedings of the Second Roman Military Equipment Seminar, BAR International Series 275, Oxford, 1985, 220-366.
^Klopsteg, Paul E. (1987). "Turkish Archery And The Composite Bow". No. 3rd. Manchester: Simon Archery Foundation.
^Martin, H. Desmond. "The Mongol Army." Journal of the Royal Asiatic Society of Great Britain and Ireland, no. 1 (1943): 46-85. Accessed January 7, 2021.http://www.jstor.org/stable/25221891.
^NHNZ:"How the Silk Road Made the World" (film, 2019)
^John C Halpin, Halpin C Halpin,Primer on Composite Materials Analysis,CRC Press, Apr 15, 1992,ISBN 0-87762-754-1
^The Great War Bow. Hardy R, Strickland M. Sutton Publishing 2005.ISBN 0-7509-3167-1ISBN 978-0-7509-3167-0
^"Cung hữu bất khả bất tri đích truyện thống cung thường thức: Minh thức tiểu sảo cung dữ xạ pháp".13 March 2017.
^Recurve bow draw weight chart
^Cirino, Erica."Compound Archery Shoots for Olympic Inclusion".Scientific American.Retrieved2020-03-12.

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