Spine ouestion

[daveycrockett]

?, if you have a bow tuned to aluminum that spines xxx with a point and insert weight of xx, will a wood shaft that spines xxx with a point weight equal to xx shoot the same?

[wtpops]

Humm good ? theoretically it should, but i dont know if the dynamic spine between wood and alluminum is the same. Im sure someone on here with more between their ears than me will give you a good answer.

[snag]

Different shaft weight and diameter...not usually. They will be cut to different lengths too.

[aromakr]

davey:
I'm sorry but spine is spine. If the shafts spine the same on the same tester and are the same length and point weight they will be fine. Just don't try to use the Easton chart for the aluminum's and a trad spine tester with the woods.
Bob

[Old York]

David - are you asking about static spine or dynamic spine? I thought aluminium and wood do NOT damp out their oscillations at the same rate, all else considered equal i.e., static spine, mass, length, diameter, F.O.C. etc.

[daveycrockett]

Old York, shoot I don't know. Just went over to the old arrows by kelly spine chart where he has a list of aluminum spines spined on a wood tester. Thought maybe I could match a wood arrow this way by using point and insert weight on the aluminum.

[laddy]

I have found that it is easier to be over spined with aluminum than with with wood.  In other words a bit of over spine with woods my arrows still fly pretty good, a bit over with aluminum, 2016 to 2018 for my 53# longbow, and my arrows fly like crap.  I prefer to keep my arrow length so my finger touches the broadhead at full draw.  I am not a fan of extra arrow lengths, and with that parameter I find wood is more tolerant of spine variations, there is always one that will still fly better than another out of any given bow.