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How are Charly
flatbows made?
Charly bows are made from natural materials, different types of wood
as well as composite materials like fibreglass, Karbon fibre,... and
contain from 2 - 9 layers of different materials that give a bow special
characteristics and all that at thickness from 4 - 8 mm. Materials are
glued together with special epoxie resin.
Though many people think solely of longbows when wooden bows are
mentioned, the flatbow is actually a superior bow design for most types
of wood because the stress is more evenly spread out than in a longbow.
A bow limb is essentially a flexed beam undergoing bending, and in any
flexed beam the farther from the neutral axis (line in the middle of the
flexing beam which is not under tension or compression the more stress
there is within the material. When a limb is rounded, as in a longbow,
some wood “sticks out” farther from the neutral axis, and thus is put
under greater stress. In a flatbow, the flat belly and back ensures that
all of the most highly strained wood is a uniform distance from the
neutral axis, spreading the load over a wider limb, minimizing stress
and making weaker woods far less likely to fail (break or become
permanently bent and lose the springiness needed in a bow).
Because yew, the wood of choice for English longbows, is light,
resilient, and has exceptional compressive strength, the rounded design
can be used to produce a smooth shooting, efficient, powerful bow. For
more common, lower strength, hardwoods such as elm (a bow wood used in
ancient Europe, as evidenced by bows pulled from European bogs), maple,
and ash, the flatbow design must be employed to create a bow of equal
power and efficiency. The flatbow design also lends itself to very
dense, high strength woods such as hickory and especially osage orange
(a wood favored by many Native American tribes for bow making).
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