Arrow Spine and Tapering

[luvnlongbow]

Did a search and either missed the topic or am blind. Anyway, was wondering how much (if any) effect tapering a wood shaft has on the spine of the shaft. Say you have a shaft spined at 50#. Would tapering lower the spine of the shaft? Thanks for any information.

Joe

[moebow]

Depends on the taper you use.  Full length WILL affect spine.  An 8" or so nock end taper will not change spine significantly.  When you are "customizing" a shaft I'd say you'd best have a spine meter to check though.

[Javi]

My experience with a 29" BOP 11/32 shaft tapered 10" to a 5/16" nock showed approximately a 2 lb decrease in dynamic spine.. haven't fooled with tapering since..

[Bjorn]

I discovered the same thing as Javi, about 2#. Most bending takes place mid-shaft not at the ends.

[Bill Carlsen]

One or two pounds at most.

[deaddoc4444]

MOst comercial shafts that come tapered  are a 10" taper and does not change the spine much . I taper my own and put a 16 inch taper on it and it DOES lower spine       Not a huge amount but some   Since I have a spiner also I jsut respine and make sure im where I should be.
 I just made a few arrows for my son  for shooting at Denton started with 70/75 shafts  they came down to pretty consistant  68# +or -     Shot great from his B WIdow

[luvnlongbow]

Thank you all for the information. I am wanting to try Tapering my shafts and was wondering about this.

Joe

[Zradix]

Hildebrand told me they lose about 5# in their 12" taper

[Jeff Sample]

I loose about 5-8# on 32.5" fir shafts(Surewoods).These are 23/64" shafts tapered to 5/16" on nock end, and a short taper to 11/32" on point end. How much you lose might depend on how stiff you start out - I use heavy spined shafts in the 104-110# range; before tapering they are around 115#.