Well kind of Frankie. But honestly. Spine really is an arbitrary number. It has no significance other than batching/grouping like shafts.
The static spine is measured from the nock throat to the back of point (bop) being 28"es for wood. More or less length will change dynamic spine....but will not change the static.
Basically it allows you to keep a range of spines. Be it 6 lbs, 5lbs 3 lbs range etc, between shafts to your liking. Most are 5/6lb spine groups. Some go less i am sure some go more. I generally go 3....and my outer spines become roving or small game arrows. Woods getting spendy these days..... and im low on wood!
Spine testing (deflection) is measured in .001". Poundages were given on a different formula. Poundages are like the 'x' rating in a fly fishing leaders tippet designation. Saying 7x instead of .000 (dont know actual diameter off hand) was just easier. Arrows are a similar game. Ease of use.
It does not correlate to the bow it should be shot from. Say a 60lb spine shaft from a 60lb bow, being a very common miss understanding. There are a host of variables that determine what spine you actually need. These factors all affect dynamic spine. (Remember static spine does NOT change!)
Bow design, shelf cut, string material, nock tight/looseness. Feather size, point weight, arrow length, and the shooter, are the more common dynamic spine factors that change what ACTUAL (static) spined shaft you need.
Shoot what you need!! Period! There are calculators And principles to get you in the ball park. But only shooting and fine tuning will show you what you want! Dont be lazy here! And write it down!!!! Lol.
And realize though the static spine principles the same these figures are wood relevant only. Alum is measured on 28" uprights with a 1.5lb weight. Woods on 26" and 2lb weight. No idea in carbons. I literally hate the ugly blazing things lol.
Topic: Spine testing different kinds of wood? (Read 817 times)
