Communities

Writing
Writing
Codidact Meta
Codidact Meta
The Great Outdoors
The Great Outdoors
Photography & Video
Photography & Video
Scientific Speculation
Scientific Speculation
Cooking
Cooking
Electrical Engineering
Electrical Engineering
Judaism
Judaism
Languages & Linguistics
Languages & Linguistics
Software Development
Software Development
Mathematics
Mathematics
Christianity
Christianity
Code Golf
Code Golf
Music
Music
Physics
Physics
Linux Systems
Linux Systems
Power Users
Power Users
Tabletop RPGs
Tabletop RPGs
Community Proposals
Community Proposals
tag:snake search within a tag
answers:0 unanswered questions
user:xxxx search by author id
score:0.5 posts with 0.5+ score
"snake oil" exact phrase
votes:4 posts with 4+ votes
created:<1w created < 1 week ago
post_type:xxxx type of post
Search help
Notifications
Mark all as read See all your notifications »
Q&A

Differences between two spine declarations?

+0
−0

I shoot Easton arrows. These arrows are normally labeled with "500" or "300" etc. to tell you the spine of them.

However, I've recognized a few brands which label their arrows like "3545" (or something). Note: I can't really tell if this is an accurate number but the formatting is always like this (4 digits which seem to be completely random in my eyes :) ).

So, what does the second annotation mean? What's the difference to the "common" declaration of the spine value? (And why on earth do we need both of them?)

History
Why does this post require attention from curators or moderators?
You might want to add some details to your flag.
Why should this post be closed?

0 comment threads

1 answer

+0
−0

That's a different measurement.

In the 4 digit number the first 2 digits specify the diameter of the shaft in 64ths inch. And the second number specifies the wall thickness of the shaft in 1000ths of an inch.

So 3545 would be an arrow that is 35/64ths inches thick and the wall of the arrow is .045 inches thick.

This is described at the bottom of this article:

http://www.huntersfriend.com/carbon_arrows/hunting_arrows_selection_guide_chapter_3.htm

History
Why does this post require attention from curators or moderators?
You might want to add some details to your flag.

This post was sourced from https://outdoors.stackexchange.com/a/10122. It is licensed under CC BY-SA 3.0.

0 comment threads

Sign up to answer this question »