Tillering a Tri-Lam

[Spot60]

Hey Bowyer's,

  I just pulled a Bamboo Osage longbow off the form and decided I want to make a Tri-Lam out of it. I have a 1/8" piece of Osage sitting around and that is going to be the final piece I glue onto the belly.
The question I have is;
  If I want to make a 50-55# bow out of this, what should I tiller the bow to before I place that 1/8" piece on it?
  Any help would be greatly appreciated.

[Pat B]

Why are you wanting to make it a tri-lam? You probably won't get any more performance from it and you will put more work into it.

[Spot60]

I have decided to give this one to a friend, and I think they look really nice with the belly running up into the handle. Also I haven't made one before..

[tradbower]

What is the thickness of belly lam now? When Iam making a boo backed bow I usually start with 7/16 and taper to 1/4 out to tips.

[Spot60]

I ripped a 1/8" off of a 7/16" board. It's around 1/2" tapered down to just above 1/8" @ the tips.

[tradbower]

I think it should come in close to the weight your shooting for. What is the width 1 1/2" or
1 3/8" ?

[Spot60]

The width is is a touch under 1 3/8th's.
Maybe I should just get the limbs bending evenly to 5 inches or so then glue that other lam on and go for it. I don't want to get into a corner though and  find myself running out of belly, I guess I would have to go for a narrower limb if I see that developing...
This should be fun

[Osagetree]

Your thought brings back memories of this bow. The hickory and walnut were glued up parallel, then both were taperred on a belt sander. The osage belly was glued on when it all went in the fire hose form. Once dried I tillered it out from both belly and back so not to loose the osage belly. The sasafras accents for the handle overlay, tips and fiddle back stain on the hickory backing were added later. Still shoot'n it!

 
 
 

[Pat B]

Cool bow, Joe.

[003sim]

That bow is really sharp, I really like how that osage looks on the belly of it.
Spot60- You have any photos of what you are making up?

[Spot60]

Very Nice, When you placed the osage on the bow, How thick was your Osage belly lam and how much did you gain in wieght?  
003, I don't have any pictures, maybe I can wrangle my daughters camera away from her and take some.

[Spot60]

Ok.Grrrrrr. Just snapped it.