Main Boards > The Shooters FORM Board

Arrow woods/Spine and 1970's arrow charts

<< < (2/7) > >>

Don Stokes:
Broken Arrows, if you want to get the flattest shooting shaft, go with a high spine rating number. If you want heavy arrows, go with the lower spine rating numbers. If you want the best of both, choose a higher spine rating number and a higher mass weight from the calculated weight of a shaft. If you want toughness, it's obvious that hardwoods are the way to go. Unfortunately I couldn't find toughness numbers for all of the species. Hickory is almost indestructible, based on the toughness numbers and real-world experience.

For instance, Douglas fir looks really good as a flat-shooting, hard-hitting and relatively tough compromise in the softwood group. I prefer yellow poplar in the hardwoods because cucumber magnolia is almost impossible to find, and my arrows are heavy enough (usually around 600 grains) and tough enough without sacrificing a relatively flat trajectory.

Remember that these are averages, and a good supplier can choose heavier or lighter shafts from any species.

Old York:
Okay, can anybody out there define "Radial Toughness" and the associated numbers/units as in the chart ?

Could anybody tell me what grain i should be shooting for a 40#? Anyone know what the numbers are for a red ock shaft either?

Don Stokes:
York, radial toughness is measured in inch-pounds. The test is done by putting a standard sized stick into a machine that breaks it with a swinging ball. The breaking force is measured as inch-pounds. The standard test gives us a method of comparing woods without personal bias.

UnderControl, there are several species of red oak with properties that vary a good bit. Generally, the dry specific gravity is around .65 and the MOE is around 1.9 million psi, which gives a spine rating of around 2.9, similar to ash and maple. That translates as heavy arrows. I shoot 600 grain arrows from my 40# bow, but that's just a matter of preference. The old rule of thumb is 10 grains per pound of draw weight, but many of us like more.

What happens if you shoot under 10 grain per pound? Like what would happen if i shot a poplar shaft on a 40# bow? Also, what type of wood would i shoot then for a 75# pound bow?


[0] Message Index

[#] Next page

[*] Previous page

Go to full version