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Author Topic: 'boo backed / 'boo bellied....need advice!  (Read 16840 times)

Offline rocdoc

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Re: 'boo backed / 'boo bellied....need advice!
« Reply #40 on: January 07, 2005, 10:51:00 PM »
JD.  This is a 'psuedo-D' bow.  It bends through the handle and becomes rigid in only the center 3 inches or so.  I put a short (8") center lam between the bulletwood and back boo to stiffen it just a tad and 'bulk up' the grip area.
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"The crappy stuff makes you a better bowyer, but the good stuff makes better bows"....Ferret

Offline horseapple

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Re: 'boo backed / 'boo bellied....need advice!
« Reply #41 on: January 08, 2005, 12:25:00 AM »
I thought I noticed a mid-center lam... it is kindof hard to get your nodes staggered, one way I've did it is to use 2 seperate bamboo belly slats... once positioned I z-splice and viola, you'll find out its very hard to find just the right belly spaced noded belly bamboo...
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Offline John Sturtevant

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Re: 'boo backed / 'boo bellied....need advice!
« Reply #42 on: January 08, 2005, 09:30:00 AM »
Doug, I’ve done the same thing with the node in an area that “bent too much”.   It works.
I’m pretty sure those areas that “bend too much” are usually a flaw in the tree.   Always thought that was inconsiderate of the tree.

Easier to stagger the nodes when the belly lam is two pieces, as JD says.
You’ll be fine, doing great.

One other thing.
 I always like to try and identify the odds and ends people have in their shops.   I can see a box full of turkey feathers…TB glue….suitcase with all your clothes so you don’t have to go waste time going back in the house to change during bow building season….maybe a door knob on the floor?...and is that a jar full of cash behind your suitcase?   :)
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Offline mich-mtnman

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Re: 'boo backed / 'boo bellied....need advice!
« Reply #43 on: January 08, 2005, 09:40:00 AM »
rodoc how thick are the lams???
 it looks to me like about 1/4 inch for the boo on the back maybe 1/4 -5/16 for 'core' and abot 1/8 - to 3/16 for the back...am i close?
 i have some bamboo slats comming to tinker with and i have some red oak around for a core wood that im thinking about using. neat little d bow!
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Offline rocdoc

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Re: 'boo backed / 'boo bellied....need advice!
« Reply #44 on: January 08, 2005, 10:28:00 AM »
John.  Very observant of you but the suitcase with all my clothes in it is because I CAN'T go back in the house (wife kicked me out).  The door knob is to make SURE I can't get back in the house (wife took it off).  Jar full of cash is my share of the divorce settlement (all one dollar bills)     ;)

Jamie.  Can't tell how thick the lams are....I don't measure them.  The back boo is thicker than the belly boo.  The 'core' wood started out at 1/2" tapered to 1/4" and was reduced from there after gluing the back boo on.

JD.  I wondered about a 2 piece belly AFTER I had already glued the thing on!  I'll bet that would make it much easier.....If I EVER try this again that's what I'll do.     :thumbsup:
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"The crappy stuff makes you a better bowyer, but the good stuff makes better bows"....Ferret

Offline Dano

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Re: 'boo backed / 'boo bellied....need advice!
« Reply #45 on: January 08, 2005, 11:06:00 AM »
Some women don't have any sence of humor eh Doug.  :bigsmyl:  I'd be willin to bet you make another  ;)
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"If the women don't find you handsome, they should at least find you handy" Red Green

Offline horseapple

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Re: 'boo backed / 'boo bellied....need advice!
« Reply #46 on: January 08, 2005, 11:29:00 AM »
correction Dano. men have no sense of humer:) living proof here:) this barn sure is getting cold:)
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Offline Timo

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Re: 'boo backed / 'boo bellied....need advice!
« Reply #47 on: January 08, 2005, 11:45:00 AM »
J.D. I rekon  you could upgrade to burning "crows" instead of blackbirds? Might put off more heat?
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Offline rocdoc

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Re: 'boo backed / 'boo bellied....need advice!
« Reply #48 on: January 08, 2005, 12:08:00 PM »
Good idea Timo......They'd probably taste better cooked JD; Not that you ever eat crow.     :bigsmyl:

I've been scraping all morning and have the bow down to 52# @ 26"....I'm afraid I'm going to be looking at a Urac bellied bow before long!

I haven't trapped the back any further because the bow is so narrow.  I'm worried about the limbs straying on me if I do, but If this belly gets much thinner I may have to.  Either that or give this bow to some gorrilla who can shoot it....Maybe Mike Hames???  That's a compliment Mikee.....don't want to offend you, I'm gonna need some Sage split come march.     :thumbsup:
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"The crappy stuff makes you a better bowyer, but the good stuff makes better bows"....Ferret

Offline Dano

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Re: 'boo backed / 'boo bellied....need advice!
« Reply #49 on: January 08, 2005, 12:33:00 PM »
Geeze burn one blackbird, and people start accusing you of eating crow. Man this place is tuff.  :bigsmyl:  

It sounds like your bringing the weight down OK. How's she lookin?
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"If the women don't find you handsome, they should at least find you handy" Red Green

Offline rocdoc

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Re: 'boo backed / 'boo bellied....need advice!
« Reply #50 on: January 08, 2005, 01:03:00 PM »
Not too bad Dano.  Got a couple of 'tiller imperfections' but those darn nodes are killin me.  Here's a couple more pics.  I'm down to 53# @ 27".  This first pic is braced and the next one is drawn to 25".  I couldn't draw it any further cause I was holdin the camera with one hand and drawin' with the other.     :cool:

Bottom limb is on left...1/8" to 3/16" postive tillered.

Braced:

 
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"The crappy stuff makes you a better bowyer, but the good stuff makes better bows"....Ferret

Offline rocdoc

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Re: 'boo backed / 'boo bellied....need advice!
« Reply #51 on: January 08, 2005, 01:10:00 PM »
Drawn to 25"....little flat at mid-limb and slightly 'hingey' just past the node on the belly....Oh well!  

 
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"The crappy stuff makes you a better bowyer, but the good stuff makes better bows"....Ferret

Offline Dano

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Re: 'boo backed / 'boo bellied....need advice!
« Reply #52 on: January 08, 2005, 02:27:00 PM »
I can imagine tillerin around them nodes is tuff, but dang Doug it looks pretty good to me, a little stiff at mid limb. Great progress if ya ask me.
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"If the women don't find you handsome, they should at least find you handy" Red Green

Offline Physh

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Re: 'boo backed / 'boo bellied....need advice!
« Reply #53 on: January 08, 2005, 03:23:00 PM »
Tiller the sides of the bows and the back...not the belly.

You can also tiller with heat...but this raises draw weight..
I imagine you can just take the heat gun to it to stiffen up an area or to make it bend right while the bow is braced.

Thats what they do with hornbows so you dont need to scrape so much.

It looks like you sanded the nodes a bit! Don't do that, the power fibers follow the bump on the nodes, if you scrape the nodes thats where it will most likely seperate.

Looks like its bending primarily right outside the fades. Maybe if while it was unstring you heated it there a bit with the heatgun, and after it cools down it should be stiffer. (there has to be a slight color change before it gets stiffer)
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Offline rocdoc

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Re: 'boo backed / 'boo bellied....need advice!
« Reply #54 on: January 08, 2005, 04:07:00 PM »
Physh.  Are you suggesting I scrape the boo on the back of the bow?  Since bamboo is primarily a 'tensional' component I REALLY don't want to violate the power fibers on the back.  Also, this is a 'D' style bow so it really has no fades as it is supposed to bend through the handle.

Dano.  Yeah, that left (lower) limb is stiff at mid-limb.  I'll continue to work it some, but the node spacing won't allow me to remove material from the area that needs it most.
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"The crappy stuff makes you a better bowyer, but the good stuff makes better bows"....Ferret

Offline Dano

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Re: 'boo backed / 'boo bellied....need advice!
« Reply #55 on: January 08, 2005, 05:17:00 PM »
I hear ya Doug, you know this is a very interesting buildalong, thanks I got faith in ya.
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"If the women don't find you handsome, they should at least find you handy" Red Green

Offline rocdoc

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Re: 'boo backed / 'boo bellied....need advice!
« Reply #56 on: January 08, 2005, 09:07:00 PM »
Ya know......I'm really wondering WHY I did this.  The bbo's shoot really well WITHOUT the boo on the belly!!!     :confused:
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"The crappy stuff makes you a better bowyer, but the good stuff makes better bows"....Ferret

Offline Dano

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Re: 'boo backed / 'boo bellied....need advice!
« Reply #57 on: January 08, 2005, 09:12:00 PM »
We never get anywhere settin still, and you ain't settin still.   :thumbsup:
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"If the women don't find you handsome, they should at least find you handy" Red Green

Offline coonoongibber kid

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Re: 'boo backed / 'boo bellied....need advice!
« Reply #58 on: January 09, 2005, 06:48:00 AM »
you can contact me at web page
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Offline coonoongibber kid

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Re: 'boo backed / 'boo bellied....need advice!
« Reply #59 on: January 09, 2005, 07:22:00 AM »
Welcome to tillering bamboo back and belly bows.Best not to touch bamboo backing at all.If you are going to scrape work edges and belly if you have to. Belly bamboo is under compression so you can get away with some reduction even on the nodes,this will help in final tillering and weight reduction.I would suggest you shoot 100 to 200 arrows out of the bow to finally settle bow in.Work bow back to your draw
when tiller looks pretty spot on .This will bring the weight down  to the real finished weight Dont be to hasty to reduce weight out until you work the bow in on the tiller board first and shoot it in.Cheers The Coonoongibber Kid  web page
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