Spine without tester question

[jermcramp1]

I dont have a spine tester  so with using two horizontal nails in the wall and a 2lb weight, how far below the plain of the nails should the bottom of the arrow bend roughly for a 60# bow? using bamboo shafts.

I know its not exact but I was wanting a general idea.

[Gus]

Here are a couple of good links to the topic.

http://www.primitivearcher.com/smf/index.php/topic,4589.0.html

http://www.primitivearcher.com/smf/index.php/topic,446.0.html

-gus

[stringstretcher]

The deflection for a 60# arrow is .433 thousandths.  So you need the arrow to bend that much above or below the plane of the nails.

[Pat B]

When I'm making my primitive cane or sourwood shoot arrows I only use a spine tester to find the stiff side of the arrow(goes against the bow) and in some cases you can feel that just by bending the shaft.

[scattershot]

If you really want to make it simple, find an arrow that shoots well from your bow, and spine your arrows to match it.

[bowtarist]

make sure you put your nails 26" apart.  just good practice incase you ever want to make one to AMO spec. someday.  I learned that on here  dpgratz

[crooketarrow]

  I do the same except I have a ruler add between my nails. Different inkerments or different weights. Works good for shoot arrows and finding the stiff sides of shafts.