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» Trad Gang.com » Topic Archives » Build Alongs » How to tiller a banana bow (Page 3)

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Author Topic: How to tiller a banana bow
LoneWolf
Trad Bowhunter
Member # 254

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Looks like it is coming down good a traight. You have more guts than I man, I woul dhave sanded the sides flat and made a boomerang out of that one. That and I have to dust all the yellow off outside, wife doesn't even want to see it in the house.
Keep up the good work man

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LoneWolf
"Now therefore take, I pray thee, thy weapons, thy quiver and thy bow, and go out to the field, and take me some venison;" Gen 27:3

Posts: 829 | From: Somerville, Alabama | Registered: Mar 2003  |  IP: Logged | Report this post to a Moderator
Hackbow
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Cooter.....you're taking this further than most would dare. Congrats on getting this far and thanks for sharing it all with us. [thumbsup]

The only thing I could even think to point out to you is on both limbs, 10-12" in from the nocks it looks like a POSSIBILITY of early hinge development. On the left limb it right about where the stave crosses in front of the little Christmas tree and on the right limb it's just to the right of the moose lamp. It seems to me that if you don't keep the whole limb working perfectly together, that any weaker area will want to let go when you start a serious draw.

I have no experience with anything even resembling this, so take it for what it's worth. Good Luck!!!

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the Ferret
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...On the left limb it right about where the stave crosses in front of the little Christmas tree and on the right limb it's just to the right of the moose lamp... (Hackbow)

Don't hear that on this forum very often [bigsmyl]

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There is always someone that knows more than you, and someone that knows less than you, so you can always learn and you can always teach

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cooter
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Hackbow,

Thanks for pointing that out. I took a closer look at that last pic and your right, it does look like the begining of a pair a hinge's. I'll take that into consideration tomarrow when I do some more scraping. With luck maybe I'll them limbs bending in the right direction [laffsmyl]

Thanks again for pointing those two spots out to me,
Cooter

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what you lack in ability make up for with enthusiasm

Posts: 403 | From: Winona,MN | Registered: Mar 2003  |  IP: Logged | Report this post to a Moderator
cooter
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He's my most recent pic. She's starting to turn now, please cratique the tiller so far. Left limb is the bottom limb while the right limb is the top limb as your looking at the picture. Is it me or does the bottom limb look stiff from the handle to maybe midlimb with maybe a small hinge forming in that limb in the center of the far left X-mas tree? BTW, its time to start tightening up that tillering string or she will end up whip tillered I beleive.

Please if you read this give me some input,

Thanks,
Cooter
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what you lack in ability make up for with enthusiasm

Posts: 403 | From: Winona,MN | Registered: Mar 2003  |  IP: Logged | Report this post to a Moderator
the Ferret
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Dang Cooter your whipping it's butt boy! I'm not so sure that it's stiff on the left coming out of the handle as much as it is weak on the right. Regardless you are going to have to weaken the left to keep them together. Keep an eye on that. Actually considering what you started with you are doing wonderfully.

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There is always someone that knows more than you, and someone that knows less than you, so you can always learn and you can always teach

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Chris R
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Looking great [thumbsup] I'd go with what Ferret said. Be careful when she comes around, she'll come quick. I've got to hand it to you, I'd have thrown it in the "I"ll get back to it" pile a long time ago.

Chris

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DAN!(Defeat Autism Now!)

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DCM
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Looks excellent Cooter. How much weight to get that deflection?

Very minor stuff at this point but it looks soft at the red mark and flat at the green.

Looks like the nocks are flipped up a little?

http://home.midsouth.rr.com/ddmims/sb.JPG

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cooter
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Thanks for the help guys. I realy appreciate it.

DCM,
Your right those tips are flipped up. The first time I sinewed this bow(third time now) I wanted to make a static recurve so I put 3" of both tips into maybe an inch or so of recurving. Now with out realizing how much reflex this thing was going to take I'm not to sure that I'm glad I did that. Oh well, Too late now to worry about that. Anyway, when I put the sinew on I did a sinew wrap at those bends to be sure the sinew stays put.

BTY I'm not sure how much weight brought the tips to that possition. however, I got three bricks on the tillering string(21lbs) plus I'm pushing down fairly hard. If I had to guess I'd say around 40 lbs. I'm am planning to tighten that tillering string up some later tonight and might see if I can some how manage to get it on a scale. Might be hard to do without having her flip on me. Beleive me guys when I tell you I know what this might be like. The second time this had sinew on it had maybe 6 inches of reflex ans she wanted to flip worse than a fish out of water.

I'll post another pic later tonight with maybe a draw weight, if I'm lucky [bigsmyl]

Cooter

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what you lack in ability make up for with enthusiasm

Posts: 403 | From: Winona,MN | Registered: Mar 2003  |  IP: Logged | Report this post to a Moderator
Madpigslayer
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Good Luck! I think you win a prize if you can stay on er for 8 seconds. [Big Grin]

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...gosh this is hard.

Hailey (5) 3 minutes into a pilates workout

Posts: 6159 | From: Alberta Canada | Registered: Mar 2003  |  IP: Logged | Report this post to a Moderator
cooter
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DCM,

Sorry, I was slightly off on the weight. I used a bathroom scale and a short hunk of 2X4 to check the weight. I balanced the bow on the 2X4 and attempted to push both tips down with equal pressure. To get the limbs to roughly horizontal brought the scale to 50lbs. So now, I guess I'll try to target a finished bow in the neighborhood of 60#@28".

Mickey,
And you thought I'd be flying blind on working her to weight(so did I but lets not tell anyone). I might not be able to check her using a string and pulling the bow down so I might as well balancer her on her handle and push the tips down instead [tunglaff] I may have some goofy ideas at times but once in a blue moon one does seem to work [bigsmyl]

Cooter

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what you lack in ability make up for with enthusiasm

Posts: 403 | From: Winona,MN | Registered: Mar 2003  |  IP: Logged | Report this post to a Moderator
Hackbow
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Looks great Cooter! I think you handled those potential hinge areas great. In this most recent pic, it even looks like those spots may "bump" out just a little on the back, which could have falsely pronounced the appearance earlier.

Isn't it about time you put on the helmet and safety goggles? [knothead]

Cal....I liked the "8 seconds" comment!!! [laffsmyl]

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Marc
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Sorry Cooter. Wasn't on very much in the last few days and didn't see your post.

This is what I do to start off with, I know it's a bit late but what else is new [Smile] .

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With the clamped in my vise I grab the tips and bend them by hand to work the wood and see how they are bending. Then still using my vise I use my long string and T stick like this until I get it up to brace height.

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Looks like you have already jumped that hurdle though.

I then use this device, that I built especially for highly reflexed bows, to brace the bow.

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Once the bow is braced it gets a lot easier.

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Marc

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cooter
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Dang Marc,

I should have told you to go a head and start the build along then jumped in. I like those forms you've got and wish I had a set up like that. guess I'll just have to make due with what I've got and improvise when in doubt.

I think I've got the tiller straightened out. But got to tell you the 'ol rectal spyncter is sure pickering tighter than a snare drum when I took this next pic. She started to snap, crackle, and pop pretty good and being so close and all. Lets just say I don't want to catch a limb if she goes south. Especially after catching a limb across the nose when she flipped on me the first time I put her on the tillering tree.

Again all comments and insights are greatly appreciated.

Thanks,
Cooter

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what you lack in ability make up for with enthusiasm

Posts: 403 | From: Winona,MN | Registered: Mar 2003  |  IP: Logged | Report this post to a Moderator
cooter
Trad Bowhunter
Member # 149

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Upon furthor review of that last pic I think the tips are hitting nearly the same plane but the left limb is starting for form a nice arc while the right limb is nor flat. I'm going to need to correct that be for continuing on with the process. I will be trying to get a short sting on her now. Giddy up and start the stop watch. Any wagers how long I'll ride her before being bucked off [bigsmyl]

Cooter

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what you lack in ability make up for with enthusiasm

Posts: 403 | From: Winona,MN | Registered: Mar 2003  |  IP: Logged | Report this post to a Moderator
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