Results 1 to 6 of 6

Thread: spine or not?

  1. #1
    In the Blue
    Join Date
    Feb 2018
    Posts
    160
    Thanks
    13
    Thanked 5 Times in 5 Posts

    spine or not?

    hi all, this has prob been answered before but I cant find it, so apoligees. I understand that arrows fired from a non centre shot bow need to bend around the bow (spine) but I don't understand this in relation to centre shot bows, surely you would just need an arrow that will not bend at all, or does spine in relation to these bows mean something else?

  2.  

  3. #2
    It's an X I've taken part in an AIUK Ironman Shoot.The Fonz Award.AIUK subscriber. Timid Toad's Avatar
    Join Date
    Mar 2006
    Posts
    3,140
    Thanks
    23
    Thanked 291 Times in 258 Posts
    It still has to come off your fingers, so will start to deviate there. Therefore the arrow still needs to flex just enough, for which you will need the correct spine.
    "Time is an illusion. Lunchtime doubly so." Douglas Adams

  4. #3
    It's an X Del the Cat's Avatar
    Join Date
    Oct 2008
    Location
    Harlow Essex
    Posts
    3,975
    Blog Entries
    2
    Thanks
    24
    Thanked 375 Times in 313 Posts
    With a centre shot (or near centre shot) as the string slips off the fingers under huge acceleration it will start the arrow flexing sideways (anything that long and thin will always have some flex). As it oscillates it may or may not come cleanly away from the bow. If the oscillation is too much or too rapid the back end of the arrow may clatter against the bow.
    Thus the arrow needs to be tuned to the bow/archer's loose by selecting the correct spine etc.
    There are many variables. and pretty much any old wooden arrow would shoot fine for just hitting a sack at 20 yards! But, for serious target shooting it becomes more critical. Having said that, the matching of the arrows to each other could be argued to be more critical.
    Del
    There are plenty of myths about arrows, I've heard people saying you can't shoot wooden arrows from a compound which is total nonsense as the acceleration from a compound is much smoother than from a conventional bow.
    Health Warning:- These posts may contain traces of nut.

  5. #4
    It's an X AIUK subscriber. Rik's Avatar
    Join Date
    Jun 2005
    Location
    Carrickfergus
    Posts
    4,926
    Thanks
    16
    Thanked 384 Times in 349 Posts
    Speaking of compounds, they are much closer to the situation described... Using a release aid, with a d-loop and properly designed and setup kit and there's not much deviation... So in that case it's unlikely you'll find a "too stiff" arrow. Then it just comes down to weight/performance.
    Ever tried? Ever failed?
    Try again. Fail again. Fail better! - Beckett

    The marksman who hesitates is lost. Just take it for granted that you are going to hit and fire away before you have time to doubt the certainty of success. - Annie Oakley, 1894.

  6. #5
    It's an X
    Join Date
    Mar 2006
    Location
    Poole uk
    Posts
    21,253
    Blog Entries
    1
    Thanks
    3
    Thanked 1,100 Times in 950 Posts
    It is easy to imagine that the arrow doesn't need to bend; but that ignores the way the release causes the string to wave about side to side on the power stroke. With the back of the arrow waving about side to side on the string, you end up with the arrow at the front end, being out of line with the back end for almost all of the power stroke.
    At the point where the arrow separates from the string, the waving side to side will be going one way or the other. That's a bit like shooting arrows that you know nothing about. I mean you don't know its spine or stiffness so you don't know how it matches the bow.

  7. #6
    In the Blue
    Join Date
    Feb 2018
    Posts
    160
    Thanks
    13
    Thanked 5 Times in 5 Posts
    Quote Originally Posted by Rik View Post
    Speaking of compounds, they are much closer to the situation described... Using a release aid, with a d-loop and properly designed and setup kit and there's not much deviation... So in that case it's unlikely you'll find a "too stiff" arrow. Then it just comes down to weight/performance.
    this is what I had in mind, where it is almost machine like and i would have thought that flex would be almost negligible

Similar Threads

  1. [SOLD] X10 500 spine
    By Timid Toad in forum Arrows and components For Sale
    Replies: 6
    Last Post: 19-12-16, 12:02 PM
  2. Which Spine?
    By Peakoverload in forum Arrows & Components
    Replies: 3
    Last Post: 11-05-14, 08:59 AM
  3. 400 spine Carbon vs 400 spine Alloy?
    By Mav617 in forum Compound Bow
    Replies: 8
    Last Post: 04-02-12, 07:42 AM
  4. Spine??
    By mole1961 in forum Recurve Bow
    Replies: 6
    Last Post: 23-08-06, 12:34 AM
  5. What Spine do I need
    By pwiles1968 in forum Equipment Discussion Q&A
    Replies: 5
    Last Post: 27-05-06, 05:40 PM

Bookmarks

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •