How to Measure the Force Applied on a Bow String
- 1). Obtain something to measure force with. There are several names for these sorts of instruments--"load indicator," "force measurement gauge," "force dial," etc. These instruments operate on the same principle as a bathroom scale; the difference is that they are designed to measure weight that is pulling away from the them rather than bearing down on them. They are generally used in construction settings to test whether supporting structures can support a given weight. Choose an instrument with a hook or another mechanism to attach it to a bow string. You can find one at a hardware store.
- 2). Hook the instrument on the bowstring. Holding the bow handle with your dominant hand and holding the instrument with your other hand, pull the string back. There is no need to put an arrow in the bow.
- 3). Watch the readout to see how much force you are applying as you pull the bow back. If you are unable to read it and pull back the bow at the same time, have someone assist you. As you pull the bow further and further back, the number will keep increasing. At some point it may begin decreasing. Record the highest number the instrument gives you. This number is the draw weight.
- 4). Choose a draw weight that is right for you. An adult man generally pulls a draw weight of 55-70 pounds. An adult woman generally pulls a draw weight of 30-50 pounds, while children generally pull a draw weight of 10-25 pounds. For safety reasons, err on the side of lower draw weights for children.
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