Sunday, March 04, 2007

Impact Energy of Arrows at Different Ranges

An appendix in The Great War Bow by Mathew Strickland and Robert Hardy contains some interesting data on the impact energy of arrows at various ranges. For a 95.9 gm (3.3 oz) arrow with a long bodkin point from a bow of 150 lbs draw, the results were as follows, based on measured initial velocity and recorded range and drag coefficient estimated based on the observed values for initial velocity, range and launch angle. The initial kinetic energy was 134 joules.

Range(m) Impact Energy(J)

50m 115J
100m 98J
150m 85J
180m 80J
200m 78J

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