Quick Trilam Question

[Del the cat]

Am I better to glue the Yew belly to the Purpleheart core first (to pull straight a hint of deflex left in one Yew billet).
Or am I better gluing the Boo Purple heart and Yew all at once. I'll be gluing in the merest hint of reflex / backset (maybe an inch or two at the most)
My instinct is to do it all in one hit...
Del

[BowEd]

A friend of mine who has done many many glue ups of laminates always does them all at once like you suspected.

[Del the cat]

Ta'

[bubby]

I have done it both ways del, i prefer gluing it up in two stages. I would glue the purple heart up and get that deflex out, the glue the reflex in with the belly. It is a little more work but for me i get better results

[Del the cat]

Cheers... I might have better control doing it piecemeal.
So that's one for, one against so far  LOL
Del

[Bob W.]

Hey Del, I have glued up quite a few Bi and tri lam bows this summer with yew  and ipe and osage and have done it all at once and have had no issues gluing in 2" of backset. But you will get more opinions on this I'm sure, stay tuned.

[leonwood]

I always glue them up at once, never had a problem with it.

[Dances with squirrels]

A mere hint? All at once is fine.

I do them all, all at once. No issues. But I should clarify, any variances between the two sides are miniscule because the two halves of the bow are generally cut from the same pieces, respectively. If one lam has a hint of reflex, so does it's sister half used in the other limb. But even if they came out a little different after glue up, I'm not concerned because balancing the limbs' strengths during tillering negates such vagaries.

[Pat B]

Del, in TBBI there is a section in the "Performance..." chapter about an all hickory glue-up done in stages with slightly more reflex(I think) with each glue-up. Supposedly to increase performance. Whether or not it does I don't know.

[bubby]

Patb that is partly why i do it, it is also easier to get a static glued in with a caul and innertubes and get nice lines

[Del the cat]

I went for the all at once option.
But I did a dry run first and was careful top get it all clean and prepared ready to go.
There's been some investment in G clamps, but I used the trusty rubber strapping too, and I could see it squeezing out more glue, after the strapping the clamps all took a little more to nip 'em up.
No such thing as too many clamps or too much strapping.
Del