Archery Talk Forum banner

What is your correct draw length vs. arm span / 2.5 method

  • I just went with arm span / 2.5

    Votes: 6 6.9%
  • my draw length is shorter

    Votes: 23 26.4%
  • my draw length is longer

    Votes: 27 31.0%
  • arm span divided by 2.5 is correct for me

    Votes: 31 35.6%
1 - 3 of 3 Posts

·
Registered
Joined
·
54,205 Posts
Measuring arm span does only one thing------it gets you into the "ballpark" for draw length. That does not mean that is the length the bow will be adjusted to according to the bow company. Bottom line is you adjust the bow to the person not some number you come up with in wing span.
You can have three different bows like I do and the draw length according to each company is different but they all feel exactly the same.
 

·
Registered
Joined
·
54,205 Posts
it's incredible, how many times we have to go through this.
the wingspan method is based on "anthropometric proportion". a set of rules based on the condition that the "average" human body has specific measurements of balanced proportion. one of those balanced proportions, is that your wing span is the same as your height. if you happen to fall with this proportion, the wingspan method will be very close to your ideal draw length. if you don't, it will be close, either short or long, by the same percentage that your wingspan is either short or long, compared to your height. very few people fall into this category of equal proportion. that is why the wingspan method is considered only a "starting point" , or a "ball park measurement".
I am one of those who do fall into this category of equal proportion and my wingspan measurement /2.5 is 27.26"....my perfect draw length happens to be 27-5/16, or 27.3125".... very close to the same measurement.
if you've seen the drawing of a human body, spread eagle inside a circle, that drawing is the symbol of anthropometric proportion, established by Leonardo Da Vince, a long time ago. it's content is still used today, to design anything that has to do with the human body, fitting a design.
There is another very important part of this that people tend to forget when setting a draw length on a bow. All bows are NOT designed equally. Thus the thing I said you end up setting a bow physically to the person not some number.
 

·
Registered
Joined
·
54,205 Posts
I must be one of those individuals. I've shortened my draw about 1 1/2" over the last 40 years and take the time to tweak the heck out of my draw. It does change a little from bow to bow but not much. I had two Martin Nemisis set up exactly the same---almost. One was 26 3/4" and one was 26 13/16". There may be other factors involved, but my shooting showed that 26 3/4 is almost perfect for me. The one with 26 13/16", although I can't feel a difference, just doesn't shoot with the same consistency. Not much different, but enough that it shows up down range.
I'm betting it was the difference in the bows more than that very slight difference in draw length. Even having the same bows and same acc. they are different and can be enough they will set up differently in length. I've seen that happen more than once. But I will have to say that the "average" shooter will rarely know or see a difference at less than a 1/2" draw difference------, so on the short side than the long side.
 
1 - 3 of 3 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top