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There are three distinct styles of archery, each with its own
kind of equipment. The traditional style is called Long Bow and
consists of a simple wooden
bow of 'D' shaped section. As suggested by the name the bows are longer
than those
used in other styles. Mine are about my own height 5' 4" (163 cm)
but men’s
bows are often longer than this. The arrows have wooden shafts and feather
fletchings for guidance. The whole emphasis in this style is keeping the
traditions of the
past. Much of the shooting is done 'two-way', meaning that a row of targets
are set up at each end of a range and the archers all shoot in one direction,
then
collect their arrows from the targets and next time shoot in the opposite
direction toward the other set of targets. The material used for bowstrings
used to be
hemp or linen, which is relatively inelastic and is good for delivering
a better proportion of the bow’s energy into the speed of the arrow.
However this kind of bowstring can cause greater wear and tear to the old
bows and also
has a tendency to break. This can result in even more damage and often
complete breakage
of the bows. So a concession to the traditional style is the allowance
of more modern string materials such a Dacron, which is more elastic, and
the more
modern Fast-Flight and Dyneema which have much less tendency to break.
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The
style of equipment used in the Olympic competitions is known as the recurve
bow. This has flat rectangular section limbs generally made from
gluing together
laminations of glass fibre, carbon fibre, ceramic, wood or foam. The
result is a very efficient transfer of the energy from the bow
into the arrow
resulting in very much faster arrow flight and so lower trajectory, but
the design
also has to retain stability and control to maintain the required accuracy.
The
bow
limbs are described as recurve. This is because the curve of each limb
is concave away from the archer at the point where it leaves the rigid
centre
section
of the bow, but then reverses to be convex for a small part near the
limb tip. The
bowstring lies in a small groove aligned down the centre of this part
of the limbs and the contact here decreases as the bow is drawn
back. The
centre section
of these bows is usually made by computer driven machining of a solid
billet of aircraft quality aluminium alloy, with built in adjustment
so that the
whole bow can be fine tuned for best alignment and a set up that best
suits the individual
archer. Archers have an adjustable sight attached to the bow centre section
or riser as it is sometimes called, this is used to set the mark for
each of the
ranges the archer is required to shoot, but also to make allowances for
the effects of weather, mainly windage. Other conditions such as temperature,
humidity and
rain, will have an effect on the flight of arrows to the target as well.
A number of stabilizer weights are attached to various points
on the riser, usually attached to the ends of carbon rods, thereby
increasing
the resistance
to movement
of the bow during release of the arrow. A recent addition to bows are
rubber vibration damping modules stuck onto critical points on the
bows,
which
also help to minimize unwanted movements during the release of a shot.

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Arrows are made from carbon fibre, usually manufactured by wrapping
round an alloy inner tube. This results in a very lightweight and
so even faster
arrow
flight. The fletchings for these arrows can be flexible plastic or
often curved mylar material (similar to that used for camera film).
The curve
and angle
of application of these fletchings gives a spinning action to stabilize
the arrow's
flight, but is adjusted so as not to produce excessive drag to the
arrow's flight.
The most recent development in archery is that
of the compound bow. This style employs the use of cams or pulleys
at the ends of the bow
limbs
with extra
strings or cables running between them. The result of this is that
the bow has its maximum
draw force around half way along the arrow draw length, and then requires
less draw force to hold once the full draw length is obtained. Again
this results
in a much faster and more efficient action. It also gives the archer
more control because of the lower draw weight being held while aiming
and releasing.
This
compound bow also includes other aids such as a mechanical release
or trigger device that allows the archer to let go of the string more
cleanly
than
with the conventional finger grip. Another difference is the sight,
which is includes
a magnifying lens and a bubble to permit true leveling of the bow
during aiming.
Of course with any bow design the accuracy achieved depends
on the archer. High levels of skill can only be developed by wanting
to practice
the
sport for so
long that the ability to hit the middle of the target under all kind
of circumstances and competition situations becomes a sub-conscious
skill. The ability to
do that amount of shooting without becoming bored is what differentiates
champion
archers
from the vast majority. At the top competitive levels even small increases
in accuracy can make significant differences in results and so the
fine-tuning and
regular checking of equipment can also be an important part of the
whole approach.
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