Author Topic: Question for Tri-lam Gurus  (Read 551 times)

Offline Pago

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Question for Tri-lam Gurus
« on: May 06, 2016, 06:48:00 PM »
In an earlier thread it was recommended I find some good belly wood to go with the Bamboo back and Red Elm core I have.  This weekend I found a nice flat sawn hickory board at the hardwood store. So I am considering making a BEH tri-lam. What do you guys think? Any thoughts on stack or length? It will be for my Son who is 6'1" and wants 50-55#.  Oh, this will be our first tri-lam. Thanks.
The best made plan won't get it made the way you planned.

Offline Bowjunkie

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Re: Question for Tri-lam Gurus
« Reply #1 on: May 06, 2016, 07:46:00 PM »
It should work. What side unstrung profile?

Ballpark, for say a deflex/reflex longbow, I'd go 66" ntn. 1 1/4" wide. Bamboo 1/8" tapered to 1/16". Elm, .200 at the center tapered to .080 at the tips. Hickory, .200 parallel.

Offline Pago

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Re: Question for Tri-lam Gurus
« Reply #2 on: May 06, 2016, 10:09:00 PM »
I need to ask him, but I was thinking a little deflex and a little reflex.  I haven't built the form yet and have never built a tri-lam form. But am open to suggestions. Planning on using smooth-on or tb3. It's funny, I really want to help my son get his bow built but I originally bought this hickory to build a board bow. It would mmake a good one, but a goodtri-lam will be much better.
The best made plan won't get it made the way you planned.

Offline Bowjunkie

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Re: Question for Tri-lam Gurus
« Reply #3 on: May 07, 2016, 04:39:00 PM »
I like smooth on, but glue choice largely depends on how the gluing surfaces are prepped... or how they're prepped should depend on glue choice.

For a first one, I wouldn't get too crazy. 1 1/2" of deflex and 2 1/2" or 3" of reflex should result in a bow who's tips are about even either the front of the handle.

Have you backed bows with bamboo before?

Online Roy from Pa

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Re: Question for Tri-lam Gurus
« Reply #4 on: May 08, 2016, 07:19:00 AM »
Fully adjustable tri lam form for whatever deflex reflex you want. 1" oak board, 6" wide and 68" long. 1" steel angle iron bolted down both long sides. Center post 3 3/4" high, mid limb posts 2 3/4" high, and end posts 6" high, made from 2x4's.

 

 

Offline Pago

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Re: Question for Tri-lam Gurus
« Reply #5 on: May 09, 2016, 02:22:00 PM »
Thanks guys, you provided exactly what I was hoping for.  I have a plan, now if I can get some time off I will start making some progress.  My guys needed a weekend off so the "B" team filled in (including me) but we managed to make 76K pounds of product in 2 days not bad for a fat middle aged man lol.
The best made plan won't get it made the way you planned.

Offline LittleBen

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Re: Question for Tri-lam Gurus
« Reply #6 on: May 11, 2016, 11:00:00 PM »
My only advice, go with the smooth on. I don't like that TBIII adds so much moisture on tri+ lam bows. For a simple backed bow it's ok, but every glue line just adds more water to the wood and I'm pretty sure it takes forever to dry back out.

Offline Pago

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Re: Question for Tri-lam Gurus
« Reply #7 on: May 12, 2016, 12:37:00 AM »
I will, thanks.
The best made plan won't get it made the way you planned.

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