29 November 2022

How Many Pounds Draw

In GURPS bows and crossbows are rated in terms of ST.

You have to be as strong or stronger than the rated ST of the bow to get it to full draw and get the stated stats.

Because of the way the arms store and release energy, the partial draw of a lower ST will not give the performance of that lower ST.

Douglas Cole has made a formula that translates ST to lbs.

Bow draw = 0.5 x ST^2 

So...

98# bow is ST 14
128# bow is ST 16
144# bow is ST 17
180# bow is ST 19

A ST 10 bow would be a mere 50# 

You can revers the formula too.

ST=(2 x draw)^(1/2)

So a gym class 35# fiberglass recurve bow is a ST 8 bow.

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