Author Topic: Tri lam (Read 1892 times)

wood carver 2 · « **on:** April 19, 2020, 03:48:21 PM »

This is a bamboo backed and bellied tri lam I was building a year ago. It had a lot of set and one limb went off to one side. I picked it up again a few days ago and I managed to get it straight. Now the top limb is stronger than the lower one. I have been scraping and sanding to get it even with the other limb but no luck. The difference is only a quarter inch from limb to string. What do you all think?

The bow is about 70”. I’m not sure of the draw weight because my scale is messed up. The core is pacific yew and the riser is zebra, padauk, wenge and maple.
Dave.

KenH · « **Reply #1 on:** April 19, 2020, 06:08:54 PM »

Let's see it strung, and on the tillering tree. Can't tell much from a mantle piece photo.

Flem · « **Reply #2 on:** April 19, 2020, 10:13:30 PM »

I agree, it took a lot of set. So many nice woods in there, I hope you can make it work!

wood carver 2 · « **Reply #3 on:** April 20, 2020, 05:18:08 PM »

Here are some better pictures.

Strung profile.

Drawn to about 20”.

Just after being unstrung.
This bow started out with an inch of backset, but now it’s got a lot of set. It draws about 60# or so at 28”. I need a new scale.
Dave.

monterey · « **Reply #4 on:** April 20, 2020, 06:40:19 PM »

Still a good bow.

wood carver 2 · « **Reply #5 on:** April 20, 2020, 06:49:19 PM »

Good enough for me. I wouldn’t give it to anyone. I’m thinking that I’ll finish it and keep it for myself. I have another bow, the third one I built, that has a weird set but boy is it a sweet shooter!
Dave.

Flem · « **Reply #6 on:** April 22, 2020, 11:12:19 AM »

The right side limb in your picture looks pretty stiff. I'm guessing with a Bamboo back and belly, you can only adjust the tiller from the edges?

wood carver 2 · « **Reply #7 on:** April 22, 2020, 04:29:36 PM »

That’s the top limb. I have scraped and sanded it until it started getting narrower than the other one. I finished the string and shot it to see how it performed. I’m not sure what the draw weight is, but it’s about as much as I can shoot and it sure sunk them deep into the target.
Dave.

Flem · « **Reply #8 on:** April 22, 2020, 06:34:36 PM »

Looks like you got a classic old school Joiners style bench there, with those dog holes going down the leg

wood carver 2 · « **Reply #9 on:** April 22, 2020, 06:44:55 PM »

My Dad and I built that bench some 30 years ago. It was supposed to be a temporary one because it’s only made of spruce. We were supposed to replace it with a heavy one. 🙂
My Dad is an old school carpenter. He can build almost anything.
Dave.

wood carver 2 · « **Reply #10 on:** April 22, 2020, 06:47:32 PM »

The dog holes are to support a door while it’s being planed. We built a lot of doors.
Dave.

Roy from Pa · « **Reply #11 on:** April 23, 2020, 08:59:54 AM »

Looks like it's flat outside of both fades and all the bending is out a few more inches and outer limbs are both flat. However I don't tune to make both limbs look the same, I tune for equal limb timing and let the limbs be what they wanna be.

monterey · « **Reply #12 on:** April 23, 2020, 01:43:38 PM »

He's baaaack!

Nice ta see ya, Roy.

wood carver 2 · « **Reply #13 on:** April 23, 2020, 04:16:55 PM »

Good to hear from you Roy. That oval sure helps. It shoots well enough, but I think I’ll take a few more scrapes off the outers. Especially the top limb.
Dave.

Crooked Stic · « **Reply #14 on:** April 23, 2020, 07:02:02 PM »

Hey ole fart.

Roy from Pa · « **Reply #15 on:** April 25, 2020, 10:24:41 AM »

Howdy Ladies:)

Ok Dave

Flem · « **Reply #16 on:** April 25, 2020, 11:15:30 AM »

Looks like my snow art...... After a couple cold ones

Mad Max · « **Reply #17 on:** April 25, 2020, 11:59:35 AM »

Quote from: Roy from Pa on April 25, 2020, 10:24:41 AM

Howdy Ladies:)

Ok Dave

Howdy Roy

Roy from Pa · « **Reply #18 on:** April 27, 2020, 08:12:48 AM »

Hey Mark

Black Mockingbird · « **Reply #19 on:** April 27, 2020, 08:50:40 PM »

I've never tried a boo bellied bow...but my understanding is you need good boo and the belly needs to be cooked pre glue up otherwise they can take a lot of set. Yours is dark from what I can see. Maybe just not a good piece? Maybe ya overstressed it? Just guessing. With these you must also have basically dead nuts the same thickness taper in your lams for both limbs. It's pretty much like a glass bow recipe that you have to figure out. There shouldn't be much material removal after glue up. Just from the sides like you are. It looks like the stronger limb has a thicker core than the weaker limb to my eyes. Good luck..hope it comes around for ya.

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Author Topic: Tri lam (Read 1892 times)

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