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A = bow riser/grip, B = median plane of the bow, C = arrow aiming line and trajectory Arrow flexing both towards and away from the bow handle. The archer's paradox is the phenomenon of an arrow traveling in the direction it is pointed at full draw , when it seems that the arrow would have to pass through the starting position it was in before ...
IBO speed is defined as the initial velocity of an arrow with a weight of 5 grains (0.32 g) per pound of draw weight. While many manufacturers measure IBO speeds using a draw weight of 70 lbf (310 N) and draw length of 30 in (76 cm), the IBO standard allows a draw weight of as high as 80 ± 2 lbf (355.9 ± 8.9 N), and does not specify a draw ...
Spruce wood is nearly inelastic in compression, but usually the best available material for the belly of the bow. Driftwood, antler from caribou, or musk ox horn , have also been used. [ 1 ] First, the stave is shaped by stone or iron tools, often to a broad shape up to some 5cm wide to help the material to withstand compression.
Draw lengths of the arrows varied between 24 and 32 inches (61 and 81 cm) with the majority having a draw length of 30 inches (76 cm). [22] The head would add 2.0 to 5.9 in (5 to 15 cm) depending on type, though some 0.79 to 1.77 in (2 to 4.5 cm) must be allowed for the insertion of the shaft into the socket. [81]
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The aluminum and carbon-fiber arrow shafts used by modern archers are more consistent and straighter than wood arrows, making for more consistent shots. That makes Hill's feat truly impressive since he used only cedar wood arrows. Hill had designed and used specially made aluminum shafts to hunt African elephants for his full-length color film ...