The compound bow was invented by bow-hunter Holles Wilbur Allen in 1967 at his home state in Missouri. His bow was designed with a leverage system in mind, with pulleys (called cams) and cables to allow the archer to draw the bow easily when the strings were pulled. The compound bow's limbs are much more rigid compared to the traditional bows, like the recurve and the long bow, which limbs were flexible, therefore easy to draw.
The stiff limbs of the compound bow, usually made up of aluminum and magnesium, are very stiff and virtually impossible to bend without the cams and cables. In its stiff limbs, energy is stored and released when the bow is drawn and the arrow is released to hit a target. The strings are attached to the pulley with one or two cables attached to its opposite limb. When the string is drawn back, the pulleys pull on the cables causing the stiff limbs to bend. Once drawn back, the limbs are ready to transfer the stored energy to the arrow.
Because of the composition of the (stiff) limbs of the compound bow, it was more durable and highly resistant to extreme temperature changes and the elements of nature, unlike its wooden counterparts that get performed unstably when subjected to moisture and other outside element. Thus unaffected by these outside forces, the compound bow remained accurate and more powerful.
Adding to the strength of the compound bow is the sturdiness of its shaft and limbs. The primary shaft of the compound bow is called the riser, made up of aluminum or magnesium, or a combination of both materials that are not only strong but also very light in weight. The more advanced compound bows use the high quality 6061 aluminum used for planes. This material makes the bow's riser as rigid as possible.
The strings and cables of the compound bow are not made out ordinary steel cables covered with plastic, but are much more high-tech and made from a very tough material called HMPE or high-modulus polyethylene. This material is highly resistant to harmful chemicals, abrasion, is self-lubricating, repels most liquids or moisture, and has lower friction qualities compared to nylon. Its strength is like Teflon that has superior tensile strength and less stretchability. With such materials making up its core components, the stored energy of a drawn bow is able to efficiently transfer the power to the arrow for more accurate and powerful shots.
The stiff limbs of the compound bow, usually made up of aluminum and magnesium, are very stiff and virtually impossible to bend without the cams and cables. In its stiff limbs, energy is stored and released when the bow is drawn and the arrow is released to hit a target. The strings are attached to the pulley with one or two cables attached to its opposite limb. When the string is drawn back, the pulleys pull on the cables causing the stiff limbs to bend. Once drawn back, the limbs are ready to transfer the stored energy to the arrow.
Because of the composition of the (stiff) limbs of the compound bow, it was more durable and highly resistant to extreme temperature changes and the elements of nature, unlike its wooden counterparts that get performed unstably when subjected to moisture and other outside element. Thus unaffected by these outside forces, the compound bow remained accurate and more powerful.
Adding to the strength of the compound bow is the sturdiness of its shaft and limbs. The primary shaft of the compound bow is called the riser, made up of aluminum or magnesium, or a combination of both materials that are not only strong but also very light in weight. The more advanced compound bows use the high quality 6061 aluminum used for planes. This material makes the bow's riser as rigid as possible.
The strings and cables of the compound bow are not made out ordinary steel cables covered with plastic, but are much more high-tech and made from a very tough material called HMPE or high-modulus polyethylene. This material is highly resistant to harmful chemicals, abrasion, is self-lubricating, repels most liquids or moisture, and has lower friction qualities compared to nylon. Its strength is like Teflon that has superior tensile strength and less stretchability. With such materials making up its core components, the stored energy of a drawn bow is able to efficiently transfer the power to the arrow for more accurate and powerful shots.
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