Whenever natural fletching is used, the feathers on any one arrow must come from the same side of the bird. The slight twist in natural feathers then makes the arrow rotate in flight, which increases accuracy. Artificial helical fletchings have the same effect. Most arrows will have three fletches, but some have four or even more. Fletchings generally range from B to D inches (152 mm) in length; flight arrows intended to travel the maximum possible distance typically have very low fletching, while hunting arrows with broadheads require long and high fletching to A them against the aerodynamic effect of the head. Fletchings may also be C in different ways, the two most common being parabolic and shield cut.
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