on arrow velocity and efficiency of bows.


Someone asked this question not to long ago. Granted these tests were done when the use of Barbours linen was the string material of choice, I still think there is somethings that would be of interest considering not everyone is using the new and improved string material.

If you can find it, the book "Archery the Technical Side" its on page 45. It does state some previous tests that have yet to be published. and doenst go farther into details on the other findings.

The conclusion I will add.

The results of these tests show that the effect of using different weight strings depend to some extent on the size, shape, weight, and material of the bow.
There is an appreciable loss in efficiency in all cases, but for heavy bows this loss is small for small differences in string weights.
It's the weight of the string that is most important and not it's diameter. (i.e., the air resistance of the string is negligible.) This conclusion is based not only on these tests but on previous investigations, the results of which, have not yet been published.
The velocity of an arrow is reduced about the same amount as if the arrow were increased in weight by 1/3 the increase in weight of the string. This is reasonable since that portion of the string near the bow nock has very little effect on the arrow velocity, while the weight of that portion near the arrow has the same effect as if it were added to the arrow. For this reason it is not advisable to serve the string with heavy material but the loop end may be whipped with heavy material.
Archers may be interested in nothing that in spite of the fact that the lemonwood bow is much heavier then the maple, it does not give much higher arrow velocity. The maple is the most efficient of the three bows tested.

I cant answer how these tests will pertain to the newer more modern bow string and serving materials. It does fill in more pieces to the puzzle when it comes to fine tuning though. Thats if you are big into playing around with your equipment to get things absolutly perfect. (which it never seems to be)

Just thought ya'll would be interested in it.....hope ya like!