Primitive Archer
Main Discussion Area => Bows => Topic started by: JWMALONE on March 14, 2018, 01:26:42 pm
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Well guys, I done it this way because I had an advice over load. And I appreciate and value every ones advice. So not having a clue as to what I'm doing I did some research on lemon wood designs. I found a bunch with tropical cores, hickory backed any were from 1 to 1 1/4 wide.
So this is what I glued up, a boo backing strip 1/8th tapered to 1/16th. Ipe core/powerlam(?) 1/8th to 1/16th. Lemon wood belly 7/16 tapered to 3/8. 64 inches long one inch wide.
It kept half of what I glued in. Laying on a table it measures 5/8ths from table top to belly at center and 1 5/8ths at the tips.
Going to add a 12 inch ipe riser and tomorrow start tilering. Might try some ipe tip overlays, I've yet to do those.
Shes probably a hundred pounds over anything I could pull, so I should have took that powerlam only advice. But she is pretty.
(https://i.imgur.com/1D4ikjZl.jpg)
(https://i.imgur.com/elRmp0Dl.jpg)
(https://i.imgur.com/bfkQJQOl.jpg)
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Looks like a great start. I hope it works out. Definitely will be a good looking bow.
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Should I go ahead and add the tip overlays? They can cure while the riser is curing.
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Sure, add them now. You don't want to floor tiller without protecting that boo. Ironically enough, I too started my first lemonwood. It is straight, narrow and long. Backed with maple and has purple heart tip overlays, riser and riser overlay. Debating adding a purple heart power lam. Good luck on your build.
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So far that stuff works like a dream. I tillered a little to get it in the form then cleaned up the sides. Will definitely try Lemon wood again.
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Nice glue-up, I like the contrast of that dark ipe sandwiched in there. When the time comes, don't be afraid to make your tips scary narrow!
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I had planed on 3/8ths at the tips. That's as narrow as iv ever gone.
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Well guys, got the riser on early this morning, wasn't under any stress so I unclamped it this afternoon and roughed it out pretty close. Got the tip overlays on, left them a lil over sized for now. I will trim them down when I narrow the tips. Start tillering tomorrow afternoon, the glue should be cured out good enough by then.
This is also a prototype for the bow swap. Anyone like ? If I use this design for the swap I will use EA40 and ipe for the belly. Ive been told lemon wood is know to fret or whatever that other word is.
(https://i.imgur.com/PGepXHcl.jpg)
(https://i.imgur.com/K5KeoE2l.jpg)
(https://i.imgur.com/9x67ax6l.jpg)
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i think it will make a nice light in the hand shooter, looks great so far
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Well fellows, this is braced t 5.5 inches, pulled to 24 inches #48. Target was #50 don't think ill hit that. Gizmo and yard stick says its even. I don't know, how bad is it. Last 11 inches are stiff.
(https://i.imgur.com/AJp7SOvl.jpg)
(https://i.imgur.com/j20b4T7l.jpg)
(https://i.imgur.com/iXJv39Hl.jpg)
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The tiller looks pretty good, I would have started backing off weight at the first sign of set though. I bet if you would have brought that bow in at 35# instead of 50 it would have held it's profile better. Target weight to me is simply what I am hoping for, if a bow starts taking set I simply back off and see what I can get out of it, next time I go a bit wider. You possibly could have gone further into the fades for more bend also.
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It was an interesting first r/d. I didn't even notice it taking set at first. Youre right should have went for something lower, don't think there was enough wood to get #50. Some one with more experience probably could have I'm sure. But I done better than I thought I would with the first one. Pretty sure I can get the next one a good bit better.
Thanks Badger.
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You are doing great, your building bows and learning fast. A good rule of thumb is that if a bow starts taking set and you still have a ways to go and the tiller looks pretty even you look around for places you can get more wood working. The outer limbs won't give you all that much so we usually look at the inner limb, I think you could have shortened up the handle and fade a bit and pulled out a few more inches. Any chance you could check the physical mass of that bow?
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I have all 4 TBBS, ill do that tomorrow. Haven't got that deep into the science of it yet. Wanted to learn the basics first. just a decent bow that shoots were I'm looking.
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You are learning fast, JW. Good looking bow. I like the color contrast between the woods. Steve gave you some great advice.
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Yea I like it, at half draw its blistering fast compared to the others ive made. But I expedited that from the design. It took a lil set but I'm not complaining.
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She's looking good John. You've kinda taken in to this bow building stuff. Lots more fun than chickens. ;)
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Pat, it is more fun than chickens. But the chickens are supporting my new habit. And besides my uncle showed me a tax return, now I know why he says what he says when he walks into one of those stinking houses, " Oh yea smells like money in here" LOL Of course he owns 50 of them. I plan on buying 4 in a few years, that should keep me supplied with plenty of bow wood.
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Badger, this is the best I can figure, first time ive used this chart. Mass chart TBB 4.
64 inch bow 26 inch draw #50 =18
subtract 1 oz for #5 variance=17. That was a typo in my post, it was #44 @24 not 48. @26 its now #46.7 should settle close to 45.
add 1.5 oz for 10 inch riser, .75 for every inch over 8= 18.5oz.
add one oz. for every 2 inches draw exceeds working limb ignoring stiif tips? limbs are 27 last 11 are stiff so add 5 oz.?=23.5oz.
So the bow weighs 18.4 oz. (have a nice postal scale) I'm way under mass? (dont think thats right)
Or if they meant ignore stiff tips as in not subtracting that from the length, then I have 27 inch limbs at @26 inch draw, so back to 18.5 oz. bow weighs 18.4oz. Perry reflex CAN reduce mass by up to 10%=16.65oz.
I forgot one. Add one oz. for every 2 inches of reflex glued in. Out of the form it had 1.5, thats how far the tips were off the table any way so, add 2oz. to 16.5oz.=18.5 minus the 10% Perry reflex= 16.65oz..
Hell if i know Badger. But the bow weighs 18.4 oz. and it shoots verry nice.
I believe i will try this formula on the previos bows ive made and observe the correlation between predicted mass and how well they shoot. A good excuse to shoot some arrows if nothing else.
Not accounting for perry reflex its 1/10th of an ounce to heavy.
Had to edit this post, forgot i went with 10 inch riser not 12.
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needs more shiny stuff and some polishing. Lemon wood is really nice looking stuff. Goes well with bamboo also.
(https://i.imgur.com/vUJ7lKVl.jpg)
(https://i.imgur.com/zzhnW4ul.jpg)
(https://i.imgur.com/kyvgRhQl.jpg)
(https://i.imgur.com/xJ0jBunl.jpg)