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Author Topic: A learning experience. Tri-lam RD  (Read 5020 times)

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Offline cowboy

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  • Paul Wolfe. Springtown, TX
A learning experience. Tri-lam RD
« on: June 20, 2008, 01:30:00 pm »
I'm building a bomb here - literally I think :D. I knew eventually I'd have to try a tri-lam rd bow after watching Ralph Renfroe put one together at OJAM last year. So I ripped out some planks of Hic, and osage - prepped up a peice of boo from Mullet, and a power lam of mesquite. Got my dimension's a little off for starters, and thinking I should have cleaned everything up with acetone before glueing. I also learned that when you mix up a batch of Urac - you better be ready :D ;D. Anywho, after letting it all set up for about 14 hours I took it off the form and cleaned it up. The glue turned loose on me right at the fade on one side, so I dribbled more glue in there and reclamped - I fully expect this one to explode during tillering but of course have more slats spliced up for the second attempt 8).

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Offline cowboy

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  • Paul Wolfe. Springtown, TX
Re: A learning experience. Tri-lam RD
« Reply #1 on: June 20, 2008, 01:32:46 pm »
couple more.

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Offline DanaM

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Re: A learning experience. Tri-lam RD
« Reply #2 on: June 20, 2008, 01:47:27 pm »
Wear a full face helmet and a cup just in case ;D If your like me Paul its the only way I learn is by my mistakes.
And I make enuf of them ::)
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Offline Pat B

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Re: A learning experience. Tri-lam RD
« Reply #3 on: June 20, 2008, 02:17:51 pm »
You don't know til you try!   Looks like it will make a nice explosion if it does go! ;D 
   Looks pretty good, Paul. Keep us informed. >:D   
   Has the boo backing been tempered or is that the natural or dyed color?  If it has been tempered, you better wear the helmet and cup as Dana suggested. :o Tempering is for bellies only to increase compression strengths. Will cause failures when put under tension.     Pat
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Make the most of all that comes and the least of all that goes!    Pat Brennan  Brevard, NC

Offline cowboy

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  • Paul Wolfe. Springtown, TX
Re: A learning experience. Tri-lam RD
« Reply #4 on: June 20, 2008, 02:28:18 pm »
Ya'll are scarin me - I'm using a long line on the tillering tree ;D. That's the boo's natural color, haven't treated anything - just had em in my stovepipe oven for about two weeks. I will keep ya informed, maybe it'll actually work ::)..
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Rich Saffold

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Re: A learning experience. Tri-lam RD
« Reply #5 on: June 20, 2008, 03:50:08 pm »
I think you should be fine...
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Offline Badger

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Re: A learning experience. Tri-lam RD
« Reply #6 on: June 20, 2008, 04:24:55 pm »
Cowboy, looks good, your bend in the limb is a little close to the fades and will make it super hard to string the first time. also makes them very fast if they don't explode on you. Steve
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Offline Ryano

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  • Ryan O'Sullivan, North Western Pennsylvania
Re: A learning experience. Tri-lam RD
« Reply #7 on: June 20, 2008, 06:36:25 pm »
I can see one problem already because Ive done the same thing before. You didnt taper the fades on your riser down thin/long enough. It might be ok but I'd recomend you change that on the next one.
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Offline mullet

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  • Eddie Parker
Re: A learning experience. Tri-lam RD
« Reply #8 on: June 20, 2008, 06:46:28 pm »
  I think you'll be alright too. The first one I glued up I forgot to degrease it but the Urac held good. I'd be a little worried about the very dense, oily, Mesquite, though.
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radius

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Re: A learning experience. Tri-lam RD
« Reply #9 on: June 20, 2008, 09:51:03 pm »
so far i've found that the extra time it takes to make a really good riser pays off huge.  Hope it goes well for you.
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Offline cowboy

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  • Paul Wolfe. Springtown, TX
Re: A learning experience. Tri-lam RD
« Reply #10 on: June 20, 2008, 10:52:12 pm »
Thanks all! that's the main thing I noticed was that the riser was too short and didn't taper out gradually enough - think that's why it let go right there. I'll put a little more thought into the next one - hopefully I'll be posting this bow when/if it's finished :).
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Offline Pat B

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Re: A learning experience. Tri-lam RD
« Reply #11 on: June 21, 2008, 12:35:58 am »
Paul, You want the fades to taper to nothing in a smooth even bend. That area is where most of the stresses in a lam bow are.  Your next one will be way better. ;)     Pat
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Make the most of all that comes and the least of all that goes!    Pat Brennan  Brevard, NC
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