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In modern archery, a compound bow is a bow that uses a levering system, usually of cables and pulleys, to bend the limbs. [1] The compound bow was first developed in 1966 by Holless Wilbur Allen in North Kansas City, Missouri, and a US patent was granted in 1969. Compound bows are widely used in target practice and hunting.
For example, a 27 kg (60 lb) bow with 80% let-off only requires 53 N (12 lb f) to hold at full draw. Up to 99% let-off is possible. [54] The compound bow was invented by Holless Wilbur Allen in the 1960s (a US patent was filed in 1966 and granted in 1969) and it has become the most widely used type of bow for all forms of archery in North America.
Dacron (strength per strand = 22.5 kg (50 lb), stretch = 2.6%), a commonly used polyester material. Because of its durability and stretch, Dacron is commonly used on beginners' equipment, wooden bows, and older bows. The relatively high stretch causes less shock to the bow, which is an important consideration for wooden-handled recurves.
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Picture of a longbow made with wood, 2013. A longbow is a type of tall bow that makes a fairly long draw possible. Longbows for hunting and warfare have been made from many different woods in many cultures; in Europe they date from the Paleolithic era and, since the Bronze Age, were made mainly from yew, or from wych elm if yew was unavailable.
The materials used in construction include laminated hardwoods, aluminium alloy and composites. The prod, or bow, is usually made from laminated carbon-fibre or glass-fibre which is fitted with a bowstring made from synthetic fibres. The maximum permitted draw weight is 43 kg (95 lb) at a maximum power stroke of 30 cm (12 in).