Arrow Speed and Draw Weight

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Arrow Speed and Draw Weight

Postby Dave Eder on Fri May 01, 2009 12:29 pm

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Could you please tell me roughly how much speed each additional pound of draw weight generates in fps?

Roughly two fps per pound for small changes in the 10 pound range. However, if you turn your poundage way down on your bow you will lose some pre-stress in the limbs and the result will be a greater loss of speed than if you were shooting the same poundage with the limbs bottomed. This is because the shape of the force vs. draw curve is somewhat a function of limb pre-stress.

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A bow with the limbs cranked out will not come up to poundage as quickly at the start of the draw. Also, a bow with the limbs bottomed will have a slightly lower brace height which also makes it faster compared to a higher poundage bow with the limbs backed out to achieve the same draw force. In other words, it is best to get a bow that maxes out as closely as possible to your desired draw force.

Original Article: Arrow Speed and Draw Weight
Dave Eder
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