How about a tri lam build along...

Started by Roy from Pa, October 20, 2015, 10:38:00 AM

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Roy from Pa

Osage belly, amber action boo core lams, backed with bamboo. Boo core lams I got from Ole Troy Boy Breeding, Troy does very nice work.. 64" tip to tip, shooting for 40 #. 1 1/4" wide at the flares, and I hold the 1 1/4 width out 6 inches past the flares, then do a straight taper to 1/2 wide at the tips. The bottom limb will be 1 inch shorter than the top limb. The belly lams are Z spliced together, the top limb Osage belly lam is 5/16th thick and the bottom limb Osage belly lam is 1/4 thick. The top limb action boo core lam is 1/4 thick at the riser, tapered to 1/8th at the tip. The bottom limb action boo core lam is 1/4 at the riser, tapered to 1/16th at the tip. I make them this way because I tiller for equal limb timing and since more strain is applied to the top limb while tillering and shooting, the little extra thickness yields a near zero tiller when done. I set my tiller tree up to simulate a predetermined 3/8th high nocking point. Just how I do it, not saying everyone has to make their bows like I do.

 

I don't Z splice the core lams. Before glue up, I lay everything together, run a string down the center of the boo backing which has been pre cut to the actual bow dimensions. Then clamp it down and I drill 2 holes in the handle area and a hole on each side of the limbs out by the tips. After the glue up, I put tooth picks into all those holes to keep everything aligned.

 

I flip the tips with heat before glue up, gives the bow a sweet little recurve at the tips.

 

I wrap the bow with plastic wrap to keep the form and clamps clean.

 

Roy from Pa

I use a 3 3/4" center post which I place dead center of the 4" handle, 2 3/4" mid limb posts which I place half way between the flares and limb tips, or maybe even an inch or so closer to the flares for more deflex, and I use 6" end posts. After the bow is clamped down, I measure the height at both tips and adjust the end posts to make them the same height.

 

I use unibond800 and place the bow in my drying box at about 85 degrees till the next day.

 

Right out of the clamps.

 

Next I make a 13" riser and lay the riser on it's side and trace out the curve of the riser section of the bow onto the riser block, then cut it out and glue it up.

 

 

I don't cut the entire bow out until after the riser block is glued on and dry.

PEARL DRUMS

Is that the bow your making me for Christmas Roybert?

Roy from Pa

Roughed out riser.



I use buffalo horn for tip overlays. I lay the overlay on the tip and trace it out, then sand it flat on the edge sander.





Then glue them on with smooth on. And wrap with rubber bands.

 

Roy from Pa

Yes Pearly boy:)

Then I added cocobolo tips over the horn.





Riser cut down to finished profile and she is ready for facets cut in, then tillered.


Roy from Pa

Might have to wait a few days to start pulling her on the tree, nursing a bum shoulder. Seen an orthopedic surgeon today, had a shot of steroid injected into the shoulder joint. That was better than surgery.. Sucks getting old..   :)

And I sent all my rasps out to Boggs in California to be sharpened, should have them back by Friday I hope...

PEARL DRUMS

Cool! That means I have to finish your gift now.  :)

Roy from Pa

Take your time, I want my gift done to perfection.. LOL

fujimo

getting rasps sharpened- what does that cost- will they do the nicholson rasps that have such a random tooth pattern

Crittergetter

Hey now, what about me? Where's my Christmas present?
Hey Peal, I'll cut you cards for it ifn you actually get it!!!!
Oh, and the bow is Looking good Roy.
An elitist mentality creates discord, even among the elite!
"I went jackalope hunting but all I saw was does!"
Luck is when preparedness meets opportunity, I just need more opportunities!

Roy from Pa

Wayne, do a search for Boggs tool and file sharpening.  They are located in Paromount, California. Prices are very reasonable. Like $6.00 for a 14 inch farriers rasp. They can sharpen almost any rasp. I'm on my cell phone now, I can send you a link for them later today from home PC.
Thanks glittercritter:)

fujimo


PEARL DRUMS

No way Randy! Im the son in Michigan Roybert never had  :)  Poppa Roy is what I call him.

Roy from Pa

You can pick your friends, but ya just gotta accept your estranged Michigan son. LOL Pearly and I have become good friends through TG. I'm ok with that..

Crittergetter

An elitist mentality creates discord, even among the elite!
"I went jackalope hunting but all I saw was does!"
Luck is when preparedness meets opportunity, I just need more opportunities!

goobersan

almost thought I'd see a build along without that nasty coors stuff    :readit:  
Lookin good Mr. Painter  
getting thru a complete rotator tear right now. Shoulders are a pain. Hope you're getting along okay

canopyboy

Really? Another Roybert trilam build? I had to double check the posting date as I thought this was an old thread someone drug up.

 :saywhat:  


 :laughing:
TGMM Family of the Bow
Professional Bowhunters Society

"The earth has its music for those who will listen." - Santayana

Roy from Pa

Hey glittergirl, knock it off..   :)  

File sharpening web link..

 http://boggstool.com/page74.html

Canopygirl, I only make bows in the fall, winter, and spring. Too much crap to do outside here in the summer.

LittleBen

And I thought you might send one north for a change Roy. sad ... But I guess I'll still watch.

Buemaker

Very good Roy. Let's see that tillering process again. Bue--.

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