Author Topic: Hickory bow build.  (Read 11182 times)

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Offline PEARL DRUMS

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Re: Hickory bow build.
« Reply #150 on: March 16, 2023, 11:26:28 am »
Tough problem, but not unlikely with sinew and hickory. Both are tension monsters. That poor belly is in for a battle, I would think. I vote for a boo belly. Horn is nice, but heavy and will probably not help the mediocre performance you speak of.

That's my .0314287 cents :)
Only when the last tree has died and the last river has been poisoned and the last fish has been caught will we realize we cannot eat money.

Offline superdav95

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Re: Hickory bow build.
« Reply #151 on: March 16, 2023, 11:30:17 am »
Arvin Iíll weigh it and let you know.   Ive started prepping for the horn already but prior to that it weight about 690grams.  The tips and handle could be slimmed down a bit yet I think too.  I would say finished out it would have been around 650grams. Now with the horn itíll be closer to 750-800grams. The bow I did last year similar to this build was around there for weight.  It shot around 195-197 at 10gpp.  So close!   I had some readings at 203fps with 400grain carbon arrow. 

Bj I think Iím gonna go with the horn laminate on the belly.  Iíll get it set up today and post some pics. 
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Offline superdav95

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Re: Hickory bow build.
« Reply #152 on: March 16, 2023, 11:37:28 am »
Tough problem, but not unlikely with sinew and hickory. Both are tension monsters. That poor belly is in for a battle, I would think. I vote for a boo belly. Horn is nice, but heavy and will probably not help the mediocre performance you speak of.

That's my .0314287 cents :)

Thatís funny PD. I was up late last night debating this and cut and prepped a set of boo slats as well as horn slats.  Trying to decide I figured I would decide this am.  I am gonna go horn as I know I can still scrape a bit to fine tune tiller.  The boo Iíve done too with great results but it is trickier to get tiller right with belly lam.  I hate scraping too much of the power fibers off to fine tune.  Yes the weight increase with horn is an issue but itís pretty elastic and tough.  Horns is a known match mate with sinew and wood core.  I literally just decided this before seeing your post. 

Thanks for your input. 
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Offline PEARL DRUMS

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Re: Hickory bow build.
« Reply #153 on: March 16, 2023, 12:19:26 pm »
Good thought. Boo would limit the tweaking you are able to do. Maybe the compression strength of the horn will add enough performance that the extra mass it adds is negated? You could very well end up with a rocket ship :) Hope you do!

Only when the last tree has died and the last river has been poisoned and the last fish has been caught will we realize we cannot eat money.

Offline bjrogg

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Re: Hickory bow build.
« Reply #154 on: March 16, 2023, 03:31:28 pm »
Good thought. Boo would limit the tweaking you are able to do. Maybe the compression strength of the horn will add enough performance that the extra mass it adds is negated? You could very well end up with a rocket ship :) Hope you do!


Well you two both know way more about this than I do. Donít let my vote make you go against your better judgement.

I have never done anything with sinew backing or horn belly but I do know it is a very durable combination and you have experience with it.

Iím thinking that the horn would probably be pretty thin yet? Are you going to try for a heavier draw weight?

Bjrogg

PS Iím still thinking itís going to be a rocket launcher too. Still routing for you. And have my respect for sharing the details of this build as it goes
A hot cup of coffee and a beautiful sunrise

Offline PaSteve

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Re: Hickory bow build.
« Reply #155 on: March 16, 2023, 05:46:32 pm »
Just curious Dave. I'm assuming you would use fish bladder or hide glue for the horn belly? Also, how thick would the initial horn lam be and much draw weight do you think it will add? I have zero experience with horn. Just trying to learn.
"It seems so much more obvious with bows than with other matters, that we are the guardians of the prize we seek." Dean Torges

Offline superdav95

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Re: Hickory bow build.
« Reply #156 on: March 16, 2023, 09:49:19 pm »
Hey guys.  I glued up the horn belly lam this afternoon.  They are drying.  I used ea 40 smooth on for this glue up.  Iím hoping it will give a little more stability and be less susceptible to moisture using hide or sturgeon blend glue.  Iíve had good results with both really.  The sturgeon glue is quite a bit trickier to pull off and I wasnít in the mood for today.  The ea 40 is great glue for horn to wood.  I just do a wipe down with acetone on both surfaces prior to glue up.  Itís a gooey sticky mess but it works well.  Hereís a couple pics of the mess of clamps and inner tube wrap.  I made sure to pre heat bend the horn as much as I can so that the sinew isnít fighting it.  I do a quick dry run and then glued it up. 

Hard to see whatís going on here with the mess of clamps but there is a bow in there.  The stick at the bottom is to keep the tips aligned while drying. 

I didnít measure the slats but they are approx 1/8Ē thick and taper some towards the tips. 

Thanks for following along
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Offline bjrogg

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Re: Hickory bow build.
« Reply #157 on: March 17, 2023, 07:22:14 am »
The build along that keeps on giving.

Iím surprised you got the horn ready so fast Dave. I was expecting it to take weeks. Iím assuming you already had slats prepared? Or can you buy them that way?

Weíre going to get a good education from this build.

Bjrogg
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Offline bentstick54

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Re: Hickory bow build.
« Reply #158 on: March 17, 2023, 08:43:03 am »
Very interesting for sure.

Offline George Tsoukalas

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Re: Hickory bow build.
« Reply #159 on: March 17, 2023, 09:45:10 am »
Dave, you are very persistent. I hope it works out for you. Jawge
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Offline superdav95

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Re: Hickory bow build.
« Reply #160 on: March 17, 2023, 10:40:06 am »
The build along that keeps on giving.

Iím surprised you got the horn ready so fast Dave. I was expecting it to take weeks. Iím assuming you already had slats prepared? Or can you buy them that way?

Weíre going to get a good education from this build.

Bjrogg

Bj.  Ya. I have slats that I bought last year but they need to be shaped into consistent thickness.   They come pretty rough and uneven.  I like to pre Bend with a little heat and do a dry fit for good measure.  For this build I hadnít intended to use horn and for a bow with sinew and horn on wood laminate I would glue up horn first and may be inclined to use fish glue.  I wouldnít be concerned with the heat interfering with the sinew if done in right order.  So normally horn first then sinew.  So the ea 40 was the way to go.
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Offline superdav95

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Re: Hickory bow build.
« Reply #161 on: March 17, 2023, 10:41:07 am »
Dave, you are very persistent. I hope it works out for you. Jawge

Thanks jawge.  Itís that or stubbornness;)
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Offline bjrogg

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Re: Hickory bow build.
« Reply #162 on: March 17, 2023, 10:50:51 am »
Thanks for the explanation Dave. Makes sense

This certainly has become a good lesson in problem solving.

I still think this one is going to be worth the effort

Bjrogg
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Offline Selfbowman

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Re: Hickory bow build.
« Reply #163 on: March 17, 2023, 11:36:22 am »
Wha kind of horn you s it?  I have used gemsbok and water buffalo. Horn does tiller good.
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Offline superdav95

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Re: Hickory bow build.
« Reply #164 on: March 17, 2023, 03:48:08 pm »
Wha kind of horn you s it?  I have used gemsbok and water buffalo. Horn does tiller good.

Arvin.  Itís water Buffalo horn. 
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