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Main Boards => The Bowyer's Bench => Topic started by: styksnstryngs on April 11, 2016, 12:03:00 PM

Title: Trilam formulas
Post by: styksnstryngs on April 11, 2016, 12:03:00 PM

What lam combination, with a hickory back and an ipe/massaranduba/osage belly, would get me to about 40#@28" with a 64" length, in the design outlined in the laminated bows chapter of tbb3 (strong reflex/deflex)?
Thanks. I'm excited about this build, first trilam!

Title: Re: Trilam formulas
Post by: Roy from Pa on April 11, 2016, 01:41:00 PM

3/8th thick should.

Title: Re: Trilam formulas
Post by: styksnstryngs on April 11, 2016, 03:01:00 PM

What should I aim to taper to at the tips?

Title: Re: Trilam formulas
Post by: Roy from Pa on April 11, 2016, 03:18:00 PM

1/2 with 3/8 minimum...

Title: Re: Trilam formulas
Post by: Zradix on April 11, 2016, 05:24:00 PM

Title: Re: Trilam formulas
Post by: styksnstryngs on April 11, 2016, 06:35:00 PM

So thickness at grip is 1/2", and 3/8" at tip? Or 3/8" at grip and half that, 3/16", at the tips?

Title: Re: Trilam formulas
Post by: Roy from Pa on April 11, 2016, 06:50:00 PM

Thickness 1/2 at grip to 1/4 at tips. The 1/2 to 3/8 was for the tip width. I misunderstood you.

Title: Re: Trilam formulas
Post by: styksnstryngs on April 11, 2016, 09:13:00 PM

Thanks.