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Dynamic spine is largely determined by shaft length, head weight, and static spine. Static spine is the stiffness of the center portion of the shaft under static conditions. [ 19 ] The Archery Trade Association (ATA) (formerly the Archery Manufacturers and Merchants Organization (AMO)) static spine test method hangs a 2-pound (0.91 kg) weight ...
A type of arrow rest that has a prong or blade that supports the arrow for the entire draw cycle and shot. The prong or blade of a drop-away rest that supports the arrow when the bow is at full draw, and drops down as the arrow is released. let-off (measure) – The difference between a compound bow's holding weight and draw weight. Expressed ...
ATA is defined as the initial velocity of a 350-grain (23-gram) arrow when shot from a bow with a peak draw weight of 70 ± 0.2 lbf (311.38 ± 0.89 N) and draw length of 30 ± 0.25 in (76.20 ± 0.64 cm). 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.
The more resistant to bending a bolt is, the more "spine" it is said to have, and a crossbow with higher draw weight ideally needs to be paired with a heavier bolt point and higher spine specifications. The weight of a shaft is usually in grains, and product descriptions may provide the total weight in grains, or in grains per inch (GPI), for ...
Traditional target arrow (top) and replica medieval arrow (bottom) Modern arrow with plastic fletchings and nock An arrow is a fin-stabilized projectile launched by a bow.A typical arrow usually consists of a long, stiff, straight shaft with a weighty (and usually sharp and pointed) arrowhead attached to the front end, multiple fin-like stabilizers called fletchings mounted near the rear, and ...
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This sleek turtleneck and wide-leg-pant set looks way more expensive than it is. The gold buttons on the cuffs give it an elevated feel and the drawstring waistband on the pants allows you to ...
When the archer commences the draw, mechanical advantage is at its greatest and the bow limbs are only pre-stressed to the strung position; therefore drawing weight is at a minimum. However, the drawing weight rapidly increases because mechanical advantage reduces (consider the string is pulling more and more directly on the limbs) and stresses ...