Primitive Archer

Main Discussion Area => Bows => Topic started by: Selfbowman on May 19, 2025, 12:52:14 pm

Title: 64” recurve computer design
Post by: Selfbowman on May 19, 2025, 12:52:14 pm
Allen Case designed this bow that I’m building. It’s another challenge for me. I’ve got the widths real close and the thickness kinda close. I want the heat to form the wood as even as possible. Sorta the same design as the mini recurve I did.
Title: Re: 64” recurve computer design
Post by: Bob Barnes on May 19, 2025, 01:24:53 pm
This should be good.  I'm looking forward to how the design shoots.   :OK
Title: Re: 64” recurve computer design
Post by: Selfbowman on May 19, 2025, 01:38:30 pm
First heat session on this side.
Title: Re: 64” recurve computer design
Post by: Selfbowman on May 19, 2025, 01:40:41 pm
Handle section at this point.
Title: Re: 64” recurve computer design
Post by: Badger on May 19, 2025, 01:55:19 pm
 I like that, great design and a good length for a wood flight bow. Whats your raw length going to be?
Title: Re: 64” recurve computer design
Post by: bjrogg on May 19, 2025, 02:04:22 pm
Looking good Arvin.

I feel like I’m standing right next to you in your bow shop. Looks like a interesting design.

How much weight and draw length?

Bjrogg
Title: Re: 64” recurve computer design
Post by: Selfbowman on May 19, 2025, 02:17:46 pm
64”ntn 50@28. First heat session complete. Now when it cools I’ll start on completing my he glue up in the handle.
Title: Re: 64” recurve computer design
Post by: Selfbowman on May 19, 2025, 06:00:32 pm
Glue up done.
Title: Re: 64” recurve computer design
Post by: Selfbowman on May 19, 2025, 06:02:59 pm
Now we let the epoxy set till tomorrow. You
Title: Re: 64” recurve computer design
Post by: sleek on May 19, 2025, 06:35:55 pm
I hate that part.
Title: Re: 64” recurve computer design
Post by: Wallski on May 19, 2025, 11:52:30 pm
I like this design, and I would like to try it.    How thick is the smallest part of your raiser, where you heated it for the bend?


Thanks Steve

Title: Re: 64” recurve computer design
Post by: Pappy on May 20, 2025, 09:44:02 am
Looking good, nothing much smoother than a R/D design. Not sure on them being the fastest but are almost always sweet shooters.  :)
 Pappy
Title: Re: 64” recurve computer design
Post by: Selfbowman on May 20, 2025, 07:40:27 pm
At the bottom of the 1/4 moon it’s about to 3/4” thick. That is enough to dry heat the deflex in. Also you can take the propeller out if you have any. Matching the piece back in so you have a tight glue joint  is a pain but worth the out come. Forth heat correction. Getting close. I have the limbs close on width and thickness. Sanding block from here on out.
Title: Re: 64” recurve computer design
Post by: Selfbowman on May 20, 2025, 07:49:48 pm
Got her lined up pretty good.
Title: Re: 64” recurve computer design
Post by: Badger on May 20, 2025, 08:00:38 pm
   Because of the high early draw weight, these bows are very easy to come in light on. The bow looks great.
Title: Re: 64” recurve computer design
Post by: Selfbowman on May 20, 2025, 08:22:24 pm
Steve I’m going to tiller this to the computer force draw weight design and bend profile. I’ve found out if you use the computer dimensions you will be real close. Also I work my bend profile and not go over my designed draw weight. So I tiller from fades to tips following my bend profile.
Title: Re: 64” recurve computer design
Post by: Selfbowman on May 21, 2025, 09:54:22 am
Got the bow pretty straight and tip overlays on. Now the string groves. The dimensions are close to the plan.
Title: Re: 64” recurve computer design
Post by: Selfbowman on May 21, 2025, 09:56:07 am
Pic
Title: Re: 64” recurve computer design
Post by: Selfbowman on May 21, 2025, 01:57:26 pm
Well I have it to 20” on force draw and it’s hitting between 1/2 pound and pound at every inch so far . Now it gets tricky.🤠🤠
Title: Re: 64” recurve computer design
Post by: sleek on May 21, 2025, 02:52:25 pm
Well I have it to 20” on force draw and it’s hitting between 1/2 pound and pound at every inch so far . Now it gets tricky.🤠🤠

This is always my favorite part. It gets exciting when things start coming together on the fd numbers.
Title: Re: 64” recurve computer design
Post by: Selfbowman on May 21, 2025, 05:45:40 pm
Well full draw  broke it down. It shot 460 gr 210 yds. Not a record contender but a real smooth 50# recurve. Here is the bow down to sanding and putting the finish on.
Title: Re: 64” recurve computer design
Post by: Selfbowman on May 21, 2025, 05:47:15 pm
Pic
Title: Re: 64” recurve computer design
Post by: Selfbowman on May 21, 2025, 05:49:47 pm
Pic
Title: Re: 64” recurve computer design
Post by: Badger on May 21, 2025, 06:43:13 pm
  Beautiful!! How much unbraced reflex? behind the handle?
 You have a lot of limb contacting the string. I bet the last 4 or 5 inches it hardly gains anything. It should store a lot of energy.


Title: Re: 64” recurve computer design
Post by: Selfbowman on May 21, 2025, 09:34:57 pm
Steve it took set mid limb in the last 6” of draw. Not a lot but enough to kill it for flight. Shot 460 gr 210 yds  but the set killed early draw weight. Again this is on me . The design was low stress. It was fun and Allen and I are learning from the build. Me seeing how the dimensions change in the design helps me understand how the Bow can benefit from the design. There is a lot to learn from these designs.
Title: Re: 64” recurve computer design
Post by: Badger on May 21, 2025, 10:31:52 pm
 Where did it take the set? are the tips static?
Title: Re: 64” recurve computer design
Post by: Badger on May 21, 2025, 10:35:53 pm
 That bow follows the same principles as a Mark St louis bow with less reflex. I think the secret to these bow is getting your share of draw right into the fades and just out of them, that would take care of that last 5" that we all struggle with. Too much bend in the fades is of course even worse.  This is where our skill as bowyers comes in.