Author Topic: Hickory trilam, she looks kinda aggressive.  (Read 7975 times)

Offline John Malone

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Hickory trilam, she looks kinda aggressive.
« on: April 24, 2018, 10:08:42 PM »
All hickory trilam, 66 inches. 3/4 wide handle 4 inch flares 1 1/4 for 6 inches taper to half inch tips.
looks awful mean for some reason.

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Online Pat B

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Re: Hickory trilam, she looks kinda aggressive.
« Reply #1 on: April 24, 2018, 10:31:21 PM »
That will be fun to tiller.  :help:
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Offline John Malone

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Re: Hickory trilam, she looks kinda aggressive.
« Reply #2 on: April 24, 2018, 10:36:09 PM »
Pat I used Roy's specs for lam thickness, front profile lay out, and the form post height and placement.. It should almost tiller itself. The only difference between this one and the boo backed lemon wood I made is the center post is an inch higher, which is what it was supposed to be anyway. Again, specs from Ole Roy.
Should be pretty sweet, this or the maple I got will end up my swap bow, whichever come out better.
Life is to short to pass up anything that could potentially be bow wood!

Offline John Malone

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Re: Hickory trilam, she looks kinda aggressive.
« Reply #3 on: April 24, 2018, 10:38:41 PM »
Oh by the way, the core and belly wood lams are a couple inches longer than the back, ill cut them off later. Makes it look more extreme than it is I guess.
Life is to short to pass up anything that could potentially be bow wood!

Offline John Malone

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Re: Hickory trilam, she looks kinda aggressive.
« Reply #4 on: April 24, 2018, 11:13:33 PM »
Question fellows, would it do any good to toast the core and belly lams before I glue them up?
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Offline Bowjunkie

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Re: Hickory trilam, she looks kinda aggressive.
« Reply #5 on: April 25, 2018, 05:09:53 AM »
The outer limbs look pretty straight with most of the reflex happening at the midlimb post. Are any of the lams tapered? If so, how much?

Online Roy from Pa

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Re: Hickory trilam, she looks kinda aggressive.
« Reply #6 on: April 25, 2018, 06:28:12 AM »
John said:
Oh by the way, the core and belly wood lams are a couple inches longer than the back, ill cut them off later. Makes it look more extreme than it is I guess.

I don't see a darn thing wrong with it.

Same specs on these 3 pictures.











« Last Edit: April 25, 2018, 06:45:57 AM by Roy from Pa »

Offline John Malone

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Re: Hickory trilam, she looks kinda aggressive.
« Reply #7 on: April 25, 2018, 08:31:11 AM »
Bowjunkie, I leave the core and belly lams long (73 inches) and cut them after glue up, use em for tip overlays.

 The core is tapered.235 (15/64)to .95(3/33)
 Back is parallel 1/8.
 Belly is parallel .290 or 9/32nds. A tad over the recommended 1/4 inch.

 End post on form are 5 inches, center post is 4 3/4, mid post are 2 3/4 and are place midway of limbs as measured from end of fade to tip.

 I got all these ideas from Roy, if the darn thing was about to blow up he wouldn't say a thing. :thumbsup:
« Last Edit: April 25, 2018, 08:41:59 AM by John Malone »
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Online Roy from Pa

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Re: Hickory trilam, she looks kinda aggressive.
« Reply #8 on: April 25, 2018, 09:21:48 AM »
Well I am north of the mason dixon line:)
 :laughing:
 :thumbsup:

Offline BMorv

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Re: Hickory trilam, she looks kinda aggressive.
« Reply #9 on: April 25, 2018, 09:27:10 AM »
I knew it!  That's why Roy gets more deflex than me....2" is a lot of deflex.
 
Your core is almost tapered 0.004"/inch.  Not that that's a bad thing, just saying.
I think at that thickness or stack, 0.65" total, you will have some wood to remove unless you are going for a heavy bow.  Be careful around that deflex spot midlimb.  Like Bowjunkie is mentioning, most of your bend is happening right at that deflex post. It makes tillering in that area difficult.  I like to add a clamp between the deflex post and the reflex post to even that bend out to the tips. 
 
This one ended up making a bow, but it took a lot of set and was a nightmare to tiller....lesson learned.
Life is too short to use marginal bow wood

Online Roy from Pa

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Re: Hickory trilam, she looks kinda aggressive.
« Reply #10 on: April 25, 2018, 09:32:08 AM »
Yep Mr. Ben, your bow would be a nightmare, cause ya clamped it up wrong.

Johns will be a pleasure to tiller.

Offline John Malone

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Re: Hickory trilam, she looks kinda aggressive.
« Reply #11 on: April 25, 2018, 09:35:56 AM »
I don't understand why yours looks that way BMorv?
Life is to short to pass up anything that could potentially be bow wood!

Offline John Malone

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Re: Hickory trilam, she looks kinda aggressive.
« Reply #12 on: April 25, 2018, 09:37:19 AM »
Roy, that's the Manson Nixon line not Mason Dixon.
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Offline BMorv

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Re: Hickory trilam, she looks kinda aggressive.
« Reply #13 on: April 25, 2018, 09:43:22 AM »
Because all of the bend is happening right at the deflex post....This is how I do it now.  Makes the transition smoother and easier to tiller.
Life is too short to use marginal bow wood

Online Roy from Pa

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Re: Hickory trilam, she looks kinda aggressive.
« Reply #14 on: April 25, 2018, 09:49:41 AM »
Your deflex post isn't doing anything for deflex.

There is no deflex in that bow.



« Last Edit: April 25, 2018, 09:55:17 AM by Roy from Pa »

Offline BMorv

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Re: Hickory trilam, she looks kinda aggressive.
« Reply #15 on: April 25, 2018, 09:58:04 AM »
Yeah, that was one of my 1st tri lams.  After that on subsequent builds I kept inching my mid limb post closer to the center to get more deflex.
 
It would have helped me figure it out sooner if you had told me your mid limb and center post are 2" different!  I guess I'm too far south of the mason dixon to get the inside scoop... :dunno:
Life is too short to use marginal bow wood

Offline BMorv

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Re: Hickory trilam, she looks kinda aggressive.
« Reply #16 on: April 25, 2018, 10:03:03 AM »
Edit: I thought you were talking about my second picture.  That bow that I posted 1st was something I tried on my own before I ever started looking into tri lams.  It was just an extreme example of what no bend after the deflex post looks like and the problems it can cause.
Life is too short to use marginal bow wood

Online Roy from Pa

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Re: Hickory trilam, she looks kinda aggressive.
« Reply #17 on: April 25, 2018, 10:12:41 AM »
No problem Mr. Ben.

I can't believe a North Carolina guy got it and a Louisiana guy didn't?  :laughing:

Now ya know:)

Offline John Malone

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Re: Hickory trilam, she looks kinda aggressive.
« Reply #18 on: April 25, 2018, 10:15:29 AM »
I gotcha Ben. I'm going for #45-50. I don't get the taper formulas. .004? per inch? I don't do decimals either, I speak fractions.
Life is to short to pass up anything that could potentially be bow wood!

Offline John Malone

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Re: Hickory trilam, she looks kinda aggressive.
« Reply #19 on: April 25, 2018, 10:19:08 AM »
Don't feel bad Ben, he gave me the wrong specs the first time. Ya know how old people get with their memory and stuff.
Life is to short to pass up anything that could potentially be bow wood!

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