Trad Gang.com Post New Topic  New Poll  Post A Reply
MY PROFILE | directory login | register | search | FAQ | forum home

  next oldest topic   next newest topic
» Trad Gang.com » Main Forums » The Bowyer's Bench » Lam number question. (Page 1)

 - UBBFriend: Email this page to someone!   This topic comprises 2 pages: 1  2   
Author Topic: Lam number question.
mwosborn
Contributor 2017
Member # 21360

Icon 1 posted      Profile for mwosborn   Email mwosborn   Send New Private Message       Edit/Delete Post   Reply With Quote 
Would there be much difference in performance using a single parallel lamination twice the thickness of 2 separate laminations?

For example in these two stacks.

2 - .04" glass
1 - .120" taper .003
2 - .06" parallel

2 - .04" glass
1 - .120" taper .003
1 = .120" parallel

--------------------
Enjoy the hunt! - Mitch

Posts: 1441 | From: Albion, Nebraska | Registered: Sep 2009  |  IP: Logged | Report this post to a Moderator
kennym
Assoc Sponsor
Member # 2304

Icon 1 posted      Profile for kennym   Author's Homepage   Email kennym   Send New Private Message       Edit/Delete Post   Reply With Quote 
I've never tested this theory but I think more lams will be stronger just like hi grade plywood. So maybe a couple lbs extra with same stack.

--------------------
Stay sharp, Kenny.

https://www.kennysarchery.com/

Posts: 11838 | From: Linneus , Mo. | Registered: Jan 2004  |  IP: Logged | Report this post to a Moderator
mwosborn
Contributor 2017
Member # 21360

Icon 1 posted      Profile for mwosborn   Email mwosborn   Send New Private Message       Edit/Delete Post   Reply With Quote 
Thanks Kenny.

--------------------
Enjoy the hunt! - Mitch

Posts: 1441 | From: Albion, Nebraska | Registered: Sep 2009  |  IP: Logged | Report this post to a Moderator
Shredd
Trad Bowhunter
Member # 45311

Icon 1 posted      Profile for Shredd   Email Shredd   Send New Private Message       Edit/Delete Post   Reply With Quote 
2x Kenny... I don't have personal experience with that but what Kenny says makes sense and an old experienced bowyer told me the more lams the better...
Posts: 224 | From: Florida | Registered: Sep 2016  |  IP: Logged | Report this post to a Moderator
Al Dean
Contributor 2014
Member # 9488

Icon 1 posted      Profile for Al Dean   Email Al Dean   Send New Private Message       Edit/Delete Post   Reply With Quote 
If the 2 lams were from the same piece of wood cut one right after the other vs one lam from same piece of wood I doubt there wood be any difference. There is basically no way to prove a or b since the wood is gone. There are several bowyers that use the 2 lam style. Bama bows for one.

--------------------
TGMM Family of the Bow

Posts: 921 | From: Nebraska | Registered: Jun 2006  |  IP: Logged | Report this post to a Moderator
Shredd
Trad Bowhunter
Member # 45311

Icon 1 posted      Profile for Shredd   Email Shredd   Send New Private Message       Edit/Delete Post   Reply With Quote 
Al... Here is something for you to ponder... Get a 2x4 and rip 4- 1/4" thick pieces and 8- 1/8" pieces... Take the 1/4" pieces and glue them up in a 24" dia. half circle... Do the same with the 1/8" pieces... Now see which one has less spring-back...
In a bow it may or may not make that much a difference... It depends on the bow, the radius of the limbs, length of the limbs, thickness of the limbs and how thick the lams will have to be... On a lightweight bow you could get by with 2 core lams... With a thicker limb bow more lams would be a wiser choice... However on a straight limbed 70# Hill style bow you could get by with one core lam... But its be proven that a laminated wood with the grains somewhat crossing will be consistently stronger than a solid piece of wood...

Posts: 224 | From: Florida | Registered: Sep 2016  |  IP: Logged | Report this post to a Moderator
Robertfishes
Trad Bowhunter
Member # 5996

Icon 1 posted      Profile for Robertfishes   Email Robertfishes   Send New Private Message       Edit/Delete Post   Reply With Quote 
On a one piece bow with typical riser design... you will have to use the two 060 laminations because it would be very hard to get a .120 lamination to run up the typical riser fade without a gap between the riser fade and lamination.. even with 60 psi in the air hose. I prefer those lams to be 070 or less.
Posts: 3609 | From: Ocala , Florida | Registered: Mar 2005  |  IP: Logged | Report this post to a Moderator
Al Dean
Contributor 2014
Member # 9488

Icon 1 posted      Profile for Al Dean   Email Al Dean   Send New Private Message       Edit/Delete Post   Reply With Quote 
I don't disagree with more lams, but are we saying a self bow, basically one lam, is junk?

--------------------
TGMM Family of the Bow

Posts: 921 | From: Nebraska | Registered: Jun 2006  |  IP: Logged | Report this post to a Moderator
Crooked Stic
Trad Bowhunter
Member # 2104

Icon 1 posted      Profile for Crooked Stic   Email Crooked Stic   Send New Private Message       Edit/Delete Post   Reply With Quote 
More lams less spring back = stiffer and a bit more power stroke. Enuff to worry about ? every little bit helps. [Big Grin]

--------------------
High on Archery.

Posts: 3101 | From: Princeton IN. | Registered: Dec 2003  |  IP: Logged | Report this post to a Moderator
Bvas
Trad Bowhunter
Member # 44555

Icon 1 posted      Profile for Bvas   Email Bvas   Send New Private Message       Edit/Delete Post   Reply With Quote 
quote:
Originally posted by Al Dean:
I don't disagree with more lams, but are we saying a self bow, basically one lam, is junk?

I don't think anyone is saying they are junk. Merely that a single piece is going to be weaker and more prone to failure.

--------------------
Some hunt to survive; some survive to hunt

Posts: 643 | From: Ohio | Registered: Feb 2016  |  IP: Logged | Report this post to a Moderator
Shredd
Trad Bowhunter
Member # 45311

Icon 1 posted      Profile for Shredd   Email Shredd   Send New Private Message       Edit/Delete Post   Reply With Quote 
2x Crooked...
Posts: 224 | From: Florida | Registered: Sep 2016  |  IP: Logged | Report this post to a Moderator
Shredd
Trad Bowhunter
Member # 45311

Icon 1 posted      Profile for Shredd   Email Shredd   Send New Private Message       Edit/Delete Post   Reply With Quote 
quote:
Originally posted by Robertfishes:
On a one piece bow with typical riser design... you will have to use the two 060 laminations because it would be very hard to get a .120 lamination to run up the typical riser fade without a gap between the riser fade and lamination.. even with 60 psi in the air hose. I prefer those lams to be 070 or less.

That is a very good point Robert... But there is a trick to that... Unless your ramp design absolutely aesthetically calls for that curve, if you flatten out the last 3/4" of the ramp I'll bet you those thicker lams will lay down nicely... Provided you do not have an extreme curve , of course...
Posts: 224 | From: Florida | Registered: Sep 2016  |  IP: Logged | Report this post to a Moderator
kennym
Assoc Sponsor
Member # 2304

Icon 1 posted      Profile for kennym   Author's Homepage   Email kennym   Send New Private Message       Edit/Delete Post   Reply With Quote 
quote:
Originally posted by Al Dean:
I don't disagree with more lams, but are we saying a self bow, basically one lam, is junk?

This is just a curiosity question for selfbow guys: more growth rings or bigger ones for better performance ?

I don't know much about them, maybe someday when things slow down a bit.....

--------------------
Stay sharp, Kenny.

https://www.kennysarchery.com/

Posts: 11838 | From: Linneus , Mo. | Registered: Jan 2004  |  IP: Logged | Report this post to a Moderator
Crooked Stic
Trad Bowhunter
Member # 2104

Icon 1 posted      Profile for Crooked Stic   Email Crooked Stic   Send New Private Message       Edit/Delete Post   Reply With Quote 
Reply With Quote
I don't disagree with more lams, but are we saying a self bow, basically one lam, is junk?
I dont even think you are comparing apples to apples
. They are both bows. One with modern composites one with natural wood crafted to bend with good tiller.
Not junk if done right.

--------------------
High on Archery.

Posts: 3101 | From: Princeton IN. | Registered: Dec 2003  |  IP: Logged | Report this post to a Moderator
kennym
Assoc Sponsor
Member # 2304

Icon 1 posted      Profile for kennym   Author's Homepage   Email kennym   Send New Private Message       Edit/Delete Post   Reply With Quote 
My thought question was if a selfie has tighter rings, is it a better performer(usually)?

Wouldn't this be like more laminations except no glass?

--------------------
Stay sharp, Kenny.

https://www.kennysarchery.com/

Posts: 11838 | From: Linneus , Mo. | Registered: Jan 2004  |  IP: Logged | Report this post to a Moderator
  This topic comprises 2 pages: 1  2   

Quick Reply ~ PLEASE THINK BEFORE YOU POST! - Is your post trad bowhunting related? Check the FAQ or EMAIL if you're unsure!
Message:

HTML is not enabled.
UBB Code™ is enabled.

Instant Graemlins
   


Post New Topic  New Poll  Post A Reply Close Topic   Feature Topic   Move Topic   Delete Topic next oldest topic   next newest topic
 - Printer-friendly view of this topic
Shoot On Over To:


Contact Us | Trad Gang.com © | Privacy Statement

Copyright 2003 thru 2017 ~ Trad Gang.com ©

Powered by Infopop Corporation
UBB.classic™ 6.7.1