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Welcome bowyers to Walk-the-Talk 4
jwillis:
I'll be glad to shoot test any short draw bows on the machine and post the results, but data won't be directly comparable to the other bows (if that is important).
I fixed the link in my first post. It had an error and wouldn't work.
Jim
Keenan:
Jim it would be good if bows were tested on comparative levels. Say for example: a chonogragh result when a certain bow reaches 50 lbs weather it's 25" or 27". I know that the longer draw has the advantage but it would be intresting to see just what the advantages are for draw length vs. poundage. If a certain percentage of increase is discovered for each inch of extra travel with equal draw weights then it may be possible to dial in the overall efficiency of the bows in more of a head to head comparative.
Also I know that you said it would need to be slow draw scenario to test and make sure of the correct information. We all know the potential harm this can do. I guess my concerns would be will the holds be more then a few seconds?
jwillis:
Keenen, to date, the WTT test procedures are simply 10 grains of arrow weight per pound of draw weight pulled at 28" AMO (26-1/4" from the deepest point of the grip) on a shooting machine with a mechanical release. The release is automatically set to release at 28" AMO draw length. The bows have been built to fit the machine rather than the other way around. This is just the way we've been doing it. I'm sure there are many other types of tests possible, and we might eventually try some of these suggestions in future years. The results would be very interesting and useful. Last year was the first time that we measured draw weights for every inch and calculated a force-draw curve. We simply opted not to hold the all wood bows when reading the scale and only recorded the peak draw force at 28". We can easily record that data this year but I want permission to do it on an all wood bow because we'll have to pause momentarily at each inch or be really good at reading the scale as the string passes each mark. Jim
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