Saturday, March 23, 2019
Physics of the Compound Bow :: physics weapon bow archery
A Brief History of the Bow * Arrowheads have been found in Africa that go steady back as far as 25,000 to 50,000 B.C. * Throughout the next fewer tens of thousands of years, humans had PLENTY of duration to refine their techniques. Fire-hardening arrow heads, fl and so oning arrow shafts to mitigate their flight characteristics, tillering bows so that the upper and lower limbs had the same bend radius, etc. All of these improvements helped increase the efficiency and accuracy of the bow and arrow, and helped humans to pull round and advance throughout the ages. * One major advance was the creation of mixed bows. Around 2,800 B.C. people began blending different materials together to create amend bows. The Egyptians of these times had wide composite bows capable of shooting an arrow up to 400 yards * As you can see, the bow has been around a long while. It wasnt until recently, however, that the actual design of the bow itself was changed. In fa ct, this ingenious modification happened closely forty years ago... The deepen Bow * On December 30th, 1969, Holless Wilbur Allen was granted the patent that would change archery forever. * The invention of the compound bow was just the beginning. As with the invention of the original bow and arrow, time and ingenuity would take the prefatory concept to new heights. However, the modern understanding of physics, coupled with advanced materials and reflection techniques, has greatly increased the pace at which advances are made. * Using cams on one or both limbs of a bow allowed for an increased wedge burden in the middle of the draw and a reduced weight at adequate draw. Archers firing traditional recurve bows encounter the highest opposition and draw weight at full draw. This means less time sighting in on a target before exhaust sets in, due to the strain of holding the bow at full draw. Compound bows, on the other hand, use a cam system which places the most bu lwark about 2/3 of the way through the drawstroke. At full draw, the compound bow reduces the tension in the bowstring by as more than as 75-80%, allowing an archer to remain in position and more guardedly sight in on a target.