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Tri Lam Bow ....HELP

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Stoner:
This is when it let go

mmattockx:

--- Quote from: Stoner on February 28, 2025, 06:15:08 pm ---Hamish thanks for the reply the curly maple may get thinned down to 1/16 and is strictly for aesthetics.

--- End quote ---

Hamish is correct, the curly maple is taking all of the tension on the back and will be your weak link. I would back the osage with a 1/8" thick (at most, could even be 0.090"-0.100" if you can get it down that thin) piece of hickory and that should be a slam dunk in getting a shooting bow.

Your tiller picture looks to me like there is a hinge starting on the RH limb just off the end of the fade. It's above and a bit to the left of the skull sticker on the truck window. It doesn't look like that is where the bow failed, though, so maybe you cleared that out in tillering. I would suggest a much shorter tillering string, unless you were just checking for a ballpark weight estimate early on.


Mark

Burnsie:
I love the dual purpose tiller string. Tiller your bow, then tow your truck out of the ditch.

willie:
just a few questions to put things into perspective as those limbs look thick, at least in the pics.

nock to nock length of the bow?   and thickness of the limbs 12" out from the center of the bow?

looks like very dry country you live in, do you keep your wood inside or outside?

and how hard do you pull when you tiller and do you use a scale to measure?

paulsemp:
Yes that hickory should be between a 1/16th and an 1/8th and probably no more. To me it looks like the hickory was too thick and overpowered the belly. Also almost all your bending was on the inner third. Did you have a scale in it when you are pulling it? Chances are the weight was extremely high. If you are going to make a trilam the center lam should be a softer wood than your back and belly. Like a walnut or a cherry

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