[Archers] New Archery Rule Change

[Jonathas]

Hey! Thanks for checking my math, cause it was indeed incorrect!  And I'll
go fix the page.  But just for the record a 3 / 4 / 5 triangle has angles of
37 / 53 / 90 so isn't exactly correct either.  ;)
(thanks google, cause my trig is well gone)

A 30 / 60 / 90 triangle has sides of (square root of 3) / 1 / 2, so the
correct measurement is for every 10 yards of range you need to go 5.8 yards
to the side, for simplicity I'll be rounding that to 6 yards.

And this is why you put things out for peer review, thanks again!
Jonathas



On Fri, Mar 26, 2010 at 9:34 AM, Garth G. Groff <ggg9y at virginia.edu> wrote:

>  M'Lord Jonathas,
>
> Thank you for taking the trouble to chart the range under the new rules. I
> looked carefully at your drawing for the side distances and respectfully
> disagree with your measurements, though I will admit it has been over 40
> years since I took geometry.
>
> As I see it, the additional width of the safety zone at the target for the
> 40 yard distance should be 30 yards, not 20. The safety zones to the sides
> of the range up to the target line must be 30/60/90 degree triangles (since
> one angle is 90 degrees by default, and one is given at 30 degrees, leaving
> 60 for the remaining angle). The proportion of the sides of such a triangle
> are always 3/4/5. Thus when the shooting line is at 40 yards from the target
> the shortest side (the extension of the target line) will be 30 yards,
> leaving the diagonal from the edge of the shooting line to the outer end of
> the extension at 50 yards. This makes the width of the safety zone at the
> target line 30+10 (or whatever)+30 yards, or for most of us 70 yards wide.
> On most ranges this can be the defacto safety zone for 20 and 30 yards as
> well, since the triangles for those shorter distances would be contained
> within the larger space used for 40 yards (this would be a must if the edges
> of the safety zone were marked with tapes, white lines, or a barrier of some
> sort, since you would not want to move the boundaries with each change of
> distance).
>
> Of course, all this fuss would have been avoided if our fearless leaders
> had provided us marshals with an official diagram, instead of making us
> dredge the depths of our dreadful, pimpled high school days.
>
> Kind regards,
>
>
>
> Mungo Napier, Shire of Isenfir Archery Marshal
>
>
>
> Jonathas wrote:
>
> Given the discussion and request for clarification 2 weeks ago, I've worked
> up a first attempt to put down in writing the results of that discussion.
>
> If you have a moment please take a look at the page and reply to the list
> with your comments on what is not clear and suggestions on how to make it
> more so.
>
> http://archery.atlantia.sca.org/rangerules.html
>
> In Service,
> Jonathas
>
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