Re: [SCA-Archery] Re: Reducing bow poundage
- What you have done in tuning your bow for silence is tune is for less
efficiency. What is the length of the string length supplied by the
manufacturer? This should be the correct length for that
bow. Lengthening the string does not change the draw length, only
the brace height. If the string allows the brace height to drop
below the maximum power stroke of the bow it does not impart more
energy to the arrow. Consider also that the bow being discussed is a
Mongolian recurve and is designed to have its "as delivered" brace
height at the bottom of the power stroke.
I also have a little difficulty with this quote "AND by shortening
the string my draw weight at full draw increases, by
>up to 4-7 lbs. So shortening it should lower the full drawCarolus
>weight." That seems to be contradictory.
>At 02:05 PM 12/3/2008, you wrote:
>Carolus <eulenhorst@...> wrote:
>If a longer string is put on, the brace height is
> > lowered. When drawn to 28" the string is 28" from the back of the
> > bow regardless of its starting position. It means you had to pull
> > the longer string further to get it to the 28" point. I have seen
> > some bows where the longer string actually increased the total energy
> > imparted into the arrow thus making the same poundage bow hit harder
> > however these where cases where the shorter string was incorrect for
> > the bow to begin with.
> > Carolus
>When you lower the brace height, the string actually stays in contact
>with the arrow longer, imparting more force into the arrow before it
>leaves the string.
>I tune my hunting bows for silence by adjusting the brace height (among
>other things) usually to the point where they don't contact the string
>grooves on the limbs. By lowering the brace height by 1-2" i can gain 5-
>10 fps on my arrow speed, but i get a noisier bow.
>AND by shortening the string my draw weight at full draw increases, by
>up to 4-7 lbs. So shortening it should lower the full draw weight.
>Society rules say this about CA ammunition: "All ammunition has a
>maximum length of 28 inches (71 cm) from the back of the blunt, to the
>string acceptor on the nock."
>So, accepting that fact, you can't draw the arrow past 28". So on a 32
>lb bow, that would be the max draw weight. If you drop the brace height
>2 inches you should see the max draw weight lower, but if you measure
>arrow speed before and after lowering the brace height, the arrow speed
>I stay out of the theoretical math equations and just use what my scale
>and chronograph tell me.
>But in either case, the Marshall's scale is the measure that counts.
>Part time archer, full time Seneschal
- Hi, Jim. Hello, Everyone.
My right ring finger was just itching for a ring a moment ago, and I thought of this project. How far along did this move?
--- In SCA-Archery@yahoogroups.com, James Koch <alchem@...> wrote:
> A word file ought to do it. My e-mail address is alchem@...
> Jim Koch (Gladius The Alchemist"
> >At 06:58 AM 12/19/2008, you wrote:
> >Hi, Jim.
> > > E-mail me your designs as an attachment. I am already making the
> > > first wax prototypes.
> > > >
> > > Jim "Gladius The Alchemist"
> >If you can send an e-mail to me, the address is ashamblin4 at yahoo dot
> >com, I can send them to you as a Word file, a Publisher file and
> >possibly a PDF file.
> [Non-text portions of this message have been removed]