[edit] Equipment

[edit] Types of bows

Main article: Bow (weapon)

A longbow is a type of bow that is tall (roughly equal to or greater than the height of a person), is not recurved, and has relatively narrow limbs that are circular or D-shaped in cross section. The traditional English longbow is usually made so that its thickness is at least ⅝ of its width. If the thickness is less than ⅝ of its width then the bow would be disqualified from most modern longbow competitions. Typically a longbow is widest at the handle. Longbows have been used for hunting and warfare, by many cultures around the world, a famous example being the English longbow, during the Middle Ages.

A shortbow is a smaller version of the longbow. While it is lighter and more maneuverable, it can be drawn less far, therefore stores less energy and hence has a shorter maximum range. Short bows were used for hunting by, among others, many West Coast American tribes.

A recurve bow is the only class of bow that is shot at the Olympic Games. Its basic working principles are similar to that of a traditional longbow. Its defining feature is that the ends of the limbs curve forwards slightly, which increases the power gained from the bow and smoothens the draw.

A compound bow is designed to reduce the force that an archer must hold, yet increase the overall energy stored by the bow. Most compound designs use cams or elliptical wheels on the ends of the limbs to optimize the leverage exerted by the archer and to reduce the holding force of the bow at full draw in what is known as the "let-off". With less force required to hold a compound bow at full draw, the muscles take longer to fatigue, thus giving a compound archer more time to aim. A compound bow must be adjusted so that the let-off occurs at the correct draw length appropriate to the archer.

A crossbow is a variation on the general bow design. Instead of the limbs being held vertically, they are mounted horizontally on a stock much like that of a firearm. The limb design can either be compound or a recurve but the basic concept of shooting is the same. The string is pulled back either manually or with a windlass and locked into place. The string remains in this locked position, held soley through mechanical means until the energy stored in its limbs is released by a trigger mechanism, which launches the loaded missile. The energy stored in the shortened limbs is comparable to the longbow but packed into a smaller design that is also much easier to aim. Crossbows shoot quarrels or bolts, shorter arrows than those usual for bows.

[edit] Types of arrows and fletching

Main article: Arrow

A normal arrow consists of shaft with an arrowhead attached the front end, with fletchings and a nock at the other. Shafts are usually made of solid wood, fiberglass, aluminum alloy, or carbon fiber. Wooden arrows are prone to warping. Fiberglass arrows are brittle, but are more easily produced to uniform specifications. Aluminum shafts were a very popular high-performance choice in the later half of the 20th century due to their light weight, and subsequently higher speed and flatter trajectories. Carbon fiber arrows became popular in the 1990s and are very light, flying even faster and flatter than aluminum arrows.

The arrowhead is the primary functional part of the arrow, and plays the largest role in determining its purpose. Some arrows may simply use a sharpened tip of the solid shaft, but it is far more common for separate arrowheads to be made, usually from metal, horn, or some other hard material. The most commonly-used forms are target points, field points, and broadheads, although there are also other types, like bodkin, judo, and blunts.

Fletching is traditionally made from bird feathers, but solid plastic vanes are also used. They are attached near the nock (rear) end of the arrow with glue, or, traditionally, sinew. The fletching is equally spaced around the shaft with one placed such that it is perpendicular to the bow when nocked on the string. This fletch is called the "index fletch" or "cock feather", (the others sometimes being called the "hen feathers") and is a reference for the nocking of the arrow. Three fletches is the most common configuration, though more may be used. The fletching is sometimes attached at a slight angle, to introduce a stabilizing spin to the arrow while in flight. Oversized fletchings can be used to accentuate drag and thus limit the range of the arrow significantly; these arrows are called flu-flus. Misplacement of fletchings can often change the arrow's flight path dramatically.

[edit] Bow string

Main article: Bow string

Dacron and other modern materials offer high strength for their weight and are used on most modern bows. Linen and other traditional materials are still used on traditional bows. Almost any fiber can be made into a bow string. The author of "Arab Archery" suggests the hide of a young, emaciated camel^[17]. Njál's saga famously describes the refusal of a wife to cut her hair in order to make an emergency bowstring for her husband.

[edit] Protective equipment

Most archers wear a bracer (also known as an arm-guard) to protect the inside of the bow arm and prevent clothing from catching the bow string. The Navajo people have developed highly-ornamented bracers as non-functional items of adornment.^[18] Some archers also wear protection on their chests, called chestguards. Chestguards are to prevent the bowstring from being obstructed by the archer's body or clothing as it is released. They also protect the archer. Roger Ascham mentions one archer, presumably with an unusual shooting style, who wore a leather guard for his face.^[19]

The drawing fingers, or thumb in the case of archers using the thumb or Mongolian draw, are normally protected by a leather tab, glove, or thumb ring. A simple tab of leather is commonly used, as is a skeleton glove. Mediaeval Europeans probably used a complete leather glove.^[20] Eurasiatic archers using the Mongolian draw protected their thumbs, usually with leather according to the author of "Arab Archery", but also with special rings of various hard materials. Many surviving Turkish and Chinese examples are works of considerable art; some are so highly ornamented that they could not have been used to loose an arrow. Presumably these were items of personal adornment. In traditional Japanese archery a special glove is used, provided with a ridge which is used to draw the string.

[edit] Release aids

Archers using compound bows often use a release aid to hold the string steadily and release it precisely. This attaches to the bowstring at the nocking point and permits the archer to release the string by pulling a trigger. The "trigger" may be an actual trigger lever which is depressed by a finger or thumb (or held then released) but it may also be some other mechanism. Hydraulic and mechanical time delay triggers have been used, as have "back tension" triggers which are operated by either a change in the position of the release or "true back tension"; that is to say the release triggers when a pre-determined draw weight is reached. A mechanical release aid permits a single point of contact on the string instead of three fingers. This allows less deformity in the string at full draw, as well as providing a more consistent release than can be achieved by human fingers.

[edit] Shooting technique and form

The bow is held in the hand opposite to the archer's dominant eye, though holding the bow in the dominant hand side is advocated by some. This hand is referred to as the bow hand and its arm the bow arm. The opposite hand is called the drawing hand or string hand. Terms such as bow shoulder or string elbow follow the same convention. Right-eye-dominant archers hold the bow with their left hand, have their left side facing the target, sight towards the target with their right eye and handle the arrow and string with their right hand.

[edit] Modern Western-style competitive form

To shoot an arrow, an archer first assumes the correct stance. The body should be perpendicular to the target and the shooting line, with the feet placed shoulder-width apart. As an archer progresses from beginner to a more advanced level an 'open stance' is used/developed. Each archer will have a particular preference but mostly this term indicates that the leg furthest from the shooting line will be a half to a whole foot-length in front of the other, on the ground.

To load, the bow is pointed toward the ground and the shaft of the arrow is placed on an arrow rest which is attached in the bow window. The back of the arrow is attached to the bowstring with the 'nock' (a small plastic component which is typified by a 'v' groove for this purpose). This is called nocking the arrow. Typical arrows with three vanes should be oriented such that a single vane is pointing away from the bow. This vane is often coloured differently and has numerous names such as index fletch and cock feather.

The bowstring and arrow are held with three fingers. When using a sight, the index finger is placed above the arrow and the next two fingers below. The string is usually placed in either the first or second joint of the fingers.

The bow is then raised and drawn. This is often one fluid motion which tends to vary from archer to archer. The string hand is drawn towards the face, where it should rest lightly at an anchor point. This point is consistent from shot to shot and is usually at the corner of the mouth or on the chin. The bow arm is held outwards toward the target. The elbow of this arm should be rotated so that the inner elbow is not hyper-extended as this leads to a tendency for the bowstring to scrape the inside of the wrist or to catch on the arm guard when released. The bow should always remain vertical.

In proper form, the archer stands erect, forming a 'T'. The archer's back muscles are used to pull the arrow to the anchor point. Some bows will be equipped with a mechanical device, called a clicker, which produces a clicking sound when the archer reaches the correct draw length.

The arrow is typically released by relaxing the fingers of the drawing hand. An archer should pay attention to the recoil or follow through of his or her body, as it may indicate problems with form (technique).

[edit] Physics

Bows function by converting elastic potential energy stored in the limbs into kinetic energy of the arrow. In this process, some energy is dissipated through elastic hysteresis, reducing the overall amount released when the bow is shot. Of the energy remaining, some is damped both by the limbs of bow and the bowstring.

Arrows themselves may be designed to spread or concentrate force, depending on their applications.

Further information: archer's paradox

[edit] Hunting

Main article: bowhunting

Using archery to take game animals is known as bowhunting. Bowhunting differs markedly from hunting with firearms as the distances between the hunter and the game are much shorter in order to ensure a humane kill. The skills and practices of bowhunting therefore emphasize very close approach to the prey, whether by stalking, or waiting in a blind or treestand. Using a bow and arrow to take fish is known as bowfishing.

[edit] Modern competitive archery

Competitive archery involves shooting arrows at a target for accuracy from a set distance or distances. This is the most popular form of archery worldwide and is called target archery. A form particularly popular in Europe and America is field archery, shot at targets generally set at various distances in a wooded setting. There are also several other lesser-known and historical forms, as well as archery novelty games. Competitive archery is a sport of precision, and is as much a mental as it is a physical game.

Note the tournament rules vary from organization to organization. FITA rules are often considered normative, but large non-FITA-affiliated archery organizations do exist with different rules.

[edit] Target Archery

Main article: Target archery

Modern competitive target archery is often governed by the International Archery Federation, abbreviated FITA (Fédération Internationale de Tir à l'Arc). Olympic rules are derived from FITA rules.

Target archery competitions may be held indoors or outdoors. Indoor distances are 18 m and 25 m. Outdoor distances range from 30 m to 90 m. Competition is divided into ends of 3 or 6 arrows. After each end, the competitors walk to the target to score and retrieve their arrows. Archers have a set time limit in which to shoot their arrows.

Targets are marked with 10 evenly spaced concentric rings, which have score values from 1 through 10 assigned to them. In addition, there is an inner 10 ring, sometimes called the X ring. This becomes the 10 ring at indoor compound competitions. Outdoors, it serves as a tiebreaker with the archer scoring the most X's winning. Archers score each end by summing the scores for their arrows. Line breakers, an arrow just touching a scoring boundary line, will be awarded the higher score.

Different rounds and distances use different size target faces. These range from 40 cm (18 m FITA Indoor) to 122 cm (70 m and 90 m FITA, used in Olympic competition).