Primitive Archer

Main Discussion Area => Bows => Topic started by: DC on October 07, 2015, 01:29:24 pm

Title: Arrow pass design
Post by: DC on October 07, 2015, 01:29:24 pm

Maybe overthinking again. When I've made an arrow pass I've usually sloped it up(from the archers point of view) so it kind of cupped the arrow. I got to thinking that the "cup shape" is getting in the way of the arrow when it's bending around the bow. Should the nock shape(again from the archers POV) be at least 90 degrees so the arrow can jump straight off the shelf.

Title: Re: Arrow pass design
Post by: Pat B on October 07, 2015, 01:42:29 pm

The shelf only holds the arrow while you draw the bow. Once released the arrow shouldn't touch the shelf or side of the bow if the arrow is properly spined. This is why many of us don't cut in a shelf but add one or go without. I usually go without but use a floppy rest to protect my bow hand.

Title: Re: Arrow pass design
Post by: DC on October 07, 2015, 02:02:30 pm

Thanks Pat. I use an add-on rest. I was thinking about that first split second of release when the arrow is just coming off the shelf. A cupped shelf might add something negative to the flight. Anyway I'm going to make them more than 90 degrees from now on. Just wondered if there was anything to it.

Title: Re: Arrow pass design
Post by: Pat B on October 07, 2015, 06:41:02 pm

Generally the shelf would be crowned with the arrow sitting on the apex.

Title: Re: Arrow pass design
Post by: DC on October 07, 2015, 08:19:24 pm

I'm looking from the belly, I have them crowned.

Title: Re: Arrow pass design
Post by: DC on October 07, 2015, 08:29:03 pm

I was making like the left, now like the right. great drawing, eh ;D ;D ;D ;D

Title: Re: Arrow pass design
Post by: le0n on October 07, 2015, 08:59:23 pm

this crown (radius):
(https://lh3.googleusercontent.com/ov9KWpP6TExdlMhAEJB2xow31Xg1GWM1-BeFMD4OhKfMfQJlNwLsE-5oVInXjITDsQopkQdvTz629s-BEMx1e7DNfZSf-hp8gxoo3L2We6ch6A-GRJWA_GuFttpsOMOYXO12t2v-UgyEicLocSmbZm1hLe883RqgTAxbsNhjZ2ZuY7RpAVROgZrQaZ8PlFzpS_VYlM8hBP6uIJzzlV82IXbrfoV1WteyIq4e539mEeER1HoKKWFQzLFfwSd92jFhP5TLJ33CN0gS2KN078NZVBPqznDh1AsQr-_H6qx7l0oy8uAr9v_IRNYv6wjZDjMsZw_wK63EXYZc5wYUl1XiUvIjCcK0J_yrFjZvmTPKFTh067KNpmVVGtuvRi3b1el2rXgZPD_N3N3pomBNDAhN7C27sipcSnPUkK-J9eRqy2Rk55pv6GAT2uDTGa5PgWMrFAgJQHE--aUosqrBs52h_clQfZXLX1Xfp6Xrk0lNuSYSnsKN0FyMSF5Wbe6M-cMH9EDqnWrKT_F5ipPKniXPIDuraKcKOelbtJsEUxnq6NM=w1057-h813-no)

having the cup would indeed interfere with the archer's paradox.

Title: Re: Arrow pass design
Post by: bubbles on October 07, 2015, 10:04:21 pm

As long as it's a subtle cupping of the rest it should be fine. If your nocking point is a bit above the shelf the arrow shouldn't touch the shelf in release

Title: Re: Arrow pass design
Post by: Pappy on October 08, 2015, 04:19:35 am

I make most like the blue drawing above with the with the striker area of the bow window slightly rounded also so only a small section of the arrow touches bottom or side. The shelf either cut in or added on has a slight slant toward the bow so the arrow will set on it if I hang it while hunting.  :)
 Pappy

Title: Re: Arrow pass design
Post by: Dances with squirrels on October 08, 2015, 06:37:22 am

I used to make mine angled a wee little bit, thinking it would keep the arrow from sliding off, but I always cant my bow anyhow, and thought I may have been creating an obstacle for the arrow as it does its thing... so have been making the shelf perpendicular to the side of the bow now... like the "red" bow illustration.

Title: Re: Arrow pass design
Post by: George Tsoukalas on October 08, 2015, 08:21:23 am

My shelf is a piece or 2 of leather.

In the striker area, I judiciously remove wood to bring the arrow a few more degrees towards the target.

Jawge

Title: Re: Arrow pass design
Post by: Selfbowman on October 08, 2015, 09:10:16 am

I am with pappy except I cut it another 1/8 or so into the strike plate.    Arvin

Title: Re: Arrow pass design
Post by: Eric Krewson on October 08, 2015, 09:21:51 am

The bottom line is the more wood you have touching the arrow on an arrow pass the more likely you can torque you bow slightly on a release and throw your shot off. I radius the shelf and side plate with probably less than 1/4"  touching the arrow at any point.

Title: Re: Arrow pass design
Post by: DC on October 08, 2015, 12:32:22 pm

Thanks for all the input guys, I wasn't to far off base. Especial thanks to LeOn for making my drawing look like ship ;D ;D ;D

Title: Re: Arrow pass design
Post by: JoJoDapyro on October 08, 2015, 06:29:31 pm

Quote from: DC on October 08, 2015, 12:32:22 pm

Thanks for all the input guys, I wasn't to far off base. Especial thanks to LeOn for making my drawing look like ship ;D ;D ;D

It looks like waves, not ships.  >:D