__Arrow Spine Weight Calculator:__

__Arrow Spine Weight Calculator:__

Enter the value of total deflection weight, DW_{(lbs)} to determine the value of Arrow weight, W_{A}.

__Arrow Spine Weight Formula:__

__Arrow Spine Weight Formula:__

The physics of Arrow Spine Weight (ASPW) revolves around the principles of flexibility, force, and material properties. ASPW is a measure of how much an arrow bends or deflects when a force is applied to its centre, typically using a standardized weight. This deflection is crucial in determining how the arrow will behave when shot from a bow.

When an arrow is released, the string propels it forward, but the arrow does not travel in a perfectly straight line. Instead, it bends and oscillates due to the force applied by the string, a phenomenon known as “archer’s paradox.”

The amount of deflection, or spine, must match the draw weight of the bow; if the spine is too stiff or too flexible, the arrow will not fly accurately.

A stiffer spine (lower deflection) is needed for higher draw weights, as these arrows can withstand the greater force without excessive bending.

Conversely, a more flexible spine (higher deflection) is suitable for lower draw weights, allowing the arrow to flex appropriately under lesser force.

Arrow weight, W_{A} in grains is calculated by the product of total deflection weight, DW_{(lbs)} in pounds and 6.75.

Arrow weight, W_{A} = DW_{(lbs)} * 6.75

W_{A} = arrow weight in grains.

DW_{(lbs)} = total deflection weight in pounds, lbs.

__Arrow Spine Weight Calculation:__

__Arrow Spine Weight Calculation:__

- An arrow has a deflection weight of 300 pounds. Calculate the Arrow Spine Weight (ASPW).

Given: DW_{(lbs)} = 300pounds.

Arrow weight, W_{A} = DW_{(lbs)} * 6.75

W_{A} = 300 * 6.75

W_{A} = 2025grains.

- An arrow has an Arrow Spine Weight (ASPW) of 2700 grains. Calculate the deflection weight.

Given: W_{A} = 2700grains.

Arrow weight, W_{A} = DW_{(lbs)} * 6.75

DW_{(lbs)} = W_{A} / 6.75

DW_{(lbs)} = 2700 / 6.75

DW_{(lbs)} = 400pounds.