3Rivers Archery



INFO: Trad Archery for Bowhunters

Mitch Mitchum








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 » PowWow » Spine testing different kinds of wood? (Page 1)

 - UBBFriend: Email this page to someone!   This topic comprises 2 pages: 1  2   
Author Topic: Spine testing different kinds of wood?
frank4570
Member
Member # 36659

Icon 1 posted      Profile for frank4570   Email frank4570   Send New Private Message       Edit/Delete Post   Reply With Quote 
It seems to me that the amount of force required to bend an arrow might not correlate to how much spring that particular wood might have. A piece if wood might be stiff but still sluggish.
I have a whole bunch of dry sticks here. Some wild Rose, some hazelnut, probably some hickory and dogwood, and a hand full of really nice river cane.
Will spine testing be almost useless? Or am I just over thinking this? [Confused]

Thanks!

Posts: 17 | From: VA | Registered: Jul 2012  |  IP: Logged | Report this post to a Moderator
ChuckC
Contributor 2013
Member # 1813

Icon 1 posted      Profile for ChuckC   Email ChuckC   Send New Private Message       Edit/Delete Post   Reply With Quote 
Ultimately, if the arrow shoots well out of a bow, it works, tested or not.

Spine testing just helps choose the ones that are most likely to work ( once you know what that takes...).

Posts: 7102 | From: Deforest, Wisconsin | Registered: Oct 2003  |  IP: Logged | Report this post to a Moderator
Shadowhnter
Trad Bowhunter
Member # 44522

Icon 1 posted      Profile for Shadowhnter     Send New Private Message       Edit/Delete Post   Reply With Quote 
Spine is spine no matter wood type. Spine testing would eliminate those too far from where you need to be, as already stated, if you have a target spine in mind.
Posts: 944 | From: Kansas | Registered: Jan 2016  |  IP: Logged | Report this post to a Moderator
Orion
Contributor 2017
Member # 2759

Icon 1 posted      Profile for Orion   Email Orion   Send New Private Message       Edit/Delete Post   Reply With Quote 
Spine testing will put you in the ball park, but your observation that some materials recover faster than others is also true. Carbon recovers faster than wood, for example.

I've also found that I needed to increase spine by 5# to 10# when I moved from a mid weight softwood like Sitka spruce or POC to a much physically heavier birch or hickory shaft, in part because the hardwoods don't recover as fast (out of the same bow, all other things being equal).

Posts: 8337 | From: Wisconsin | Registered: Feb 2004  |  IP: Logged | Report this post to a Moderator
BAK
Contributor 2017
Member # 1272

Icon 1 posted      Profile for BAK   Email BAK   Send New Private Message       Edit/Delete Post   Reply With Quote 
No, spine is not spine. If that were true there would be no difference in performance between POC and carbon, and we all no there is a great difference.

It is not just about the arrows stiffness, but also about how rapidly it recovers after being bent.

--------------------
"May your blood trails be short and your drags all down hill."

Posts: 964 | From: NE Iowa | Registered: Jun 2003  |  IP: Logged | Report this post to a Moderator
SC Bowhunter
Trad Bowhunter
Member # 13620

Icon 1 posted      Profile for SC Bowhunter   Email SC Bowhunter   Send New Private Message       Edit/Delete Post   Reply With Quote 
Spine is not the arrows recovery rate after being bent.
It is the arrows stiffness.
Hence, you can have 50# spined arrows in carbon, aluminum, POC, Douglas Fir, etc.
They are all spined at 50# but each has a different recovery rate and flight characteristics.

--------------------
Compton Traditional Bowhunters
PBS Associate Member
Pope & Young General Member
BHA
NRA Life Member
NAHC Life Member

Posts: 239 | From: York, South Carolina | Registered: Sep 2007  |  IP: Logged | Report this post to a Moderator
ChuckC
Contributor 2013
Member # 1813

Icon 1 posted      Profile for ChuckC   Email ChuckC   Send New Private Message       Edit/Delete Post   Reply With Quote 
IS this gonna be like paradox ?
Posts: 7102 | From: Deforest, Wisconsin | Registered: Oct 2003  |  IP: Logged | Report this post to a Moderator
BAK
Contributor 2017
Member # 1272

Icon 1 posted      Profile for BAK   Email BAK   Send New Private Message       Edit/Delete Post   Reply With Quote 
When someone says that spine is spine I interpret that to mean an arrow made out of wood and one made out of carbon, both spined at.500 will react the same.

Of course they don't. So I guess to me spine refers to the dynamic performance, not the static measurement.

--------------------
"May your blood trails be short and your drags all down hill."

Posts: 964 | From: NE Iowa | Registered: Jun 2003  |  IP: Logged | Report this post to a Moderator
Shadowhnter
Trad Bowhunter
Member # 44522

Icon 1 posted      Profile for Shadowhnter     Send New Private Message       Edit/Delete Post   Reply With Quote 
quote:
Originally posted by BAK:
When someone says that spine is spine I interpret that to mean an arrow made out of wood and one made out of carbon, both spined at.500 will react the same.

Of course they don't. So I guess to me spine refers to the dynamic performance, not the static measurement.

Someone did NOT say spine is spine....SOMEONE said spine is spine no matter what kind of WOOD. SOMEONE never mentioned carbons or aluminums, as I think the OP was talking about wood wasnt he?
Posts: 944 | From: Kansas | Registered: Jan 2016  |  IP: Logged | Report this post to a Moderator
BAK
Contributor 2017
Member # 1272

Icon 1 posted      Profile for BAK   Email BAK   Send New Private Message       Edit/Delete Post   Reply With Quote 
It also varies between wood species as far as dynamic performance is concerned.

--------------------
"May your blood trails be short and your drags all down hill."

Posts: 964 | From: NE Iowa | Registered: Jun 2003  |  IP: Logged | Report this post to a Moderator
Shadowhnter
Trad Bowhunter
Member # 44522

Icon 1 posted      Profile for Shadowhnter     Send New Private Message       Edit/Delete Post   Reply With Quote 
quote:
Originally posted by SC Bowhunter:
Spine is not the arrows recovery rate after being bent.
It is the arrows stiffness.
Hence, you can have 50# spined arrows in carbon, aluminum, POC, Douglas Fir, etc.
They are all spined at 50# but each has a different recovery rate and flight characteristics.

This ^^^^ [banghead]
Posts: 944 | From: Kansas | Registered: Jan 2016  |  IP: Logged | Report this post to a Moderator
AkDan
Contributor 2016
Member # 429

Icon 1 posted      Profile for AkDan   Email AkDan   Send New Private Message       Edit/Delete Post   Reply With Quote 
Well spine on a spine tester as the op posted is just that static spine nothing more nothing less.

Where the confusion started was the op's post on recovery. Without directly saying it. Referencing dynamic spine

Static spine is a measurement .500 is .500 regardless if its rebar or a spahgetti noodle. A measurement of deflection. That allows you to batch similar spined shafts.


Dynamic is not a measurement as much as it is a action (or in our case reaction) to being shot. Change a variable. To keep it simple, adding weight to the point or nock end will change the DS. The static spine stays the same.

They are not inter changeable. sp vs dp. This thread seems to be attempting to, or confusing with the idea it can and or is.

Posts: 4014 | From: Alaska | Registered: Mar 2003  |  IP: Logged | Report this post to a Moderator
frank4570
Member
Member # 36659

Icon 1 posted      Profile for frank4570   Email frank4570   Send New Private Message       Edit/Delete Post   Reply With Quote 
Ah, I get it now. Spine is one component and is a rough predictor of what dynamic spine is likely to be. But it does not exactly correlate to arrow recovery. Right??


And I need to get up to speed on the terminology.

Posts: 17 | From: VA | Registered: Jul 2012  |  IP: Logged | Report this post to a Moderator
SC Bowhunter
Trad Bowhunter
Member # 13620

Icon 1 posted      Profile for SC Bowhunter   Email SC Bowhunter   Send New Private Message       Edit/Delete Post   Reply With Quote 
Shadowhnter,
I don't get your problem with my post.
I may not have stated it as clearly as AkDan did, but my point was the same.
Dynamic spine and static spine are two different things and can not be interchanged.

--------------------
Compton Traditional Bowhunters
PBS Associate Member
Pope & Young General Member
BHA
NRA Life Member
NAHC Life Member

Posts: 239 | From: York, South Carolina | Registered: Sep 2007  |  IP: Logged | Report this post to a Moderator
Orion
Contributor 2017
Member # 2759

Icon 1 posted      Profile for Orion   Email Orion   Send New Private Message       Edit/Delete Post   Reply With Quote 
You got it frank 4570. Very nice and accurate summary.
Posts: 8337 | From: Wisconsin | Registered: Feb 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 2016 ~ Trad Gang.com ©

Powered by Infopop Corporation
UBB.classic™ 6.7.1