Main Discussion Area > Arrows

spine tester in PA

<< < (2/2)

hillbilly61:
  That makes more since. I'm usually pretty good at math. even teaching my daughter algebra, bit that one got me good. If you go by the 3.75 and increase the size in MS Paint, you should be able to measure the increments in between each mark and multiply by that amount. I think I'll try it today if I get to feeling better.

mox1968:
tried it but it doesnt seem right ,i have a few shafts supposedly 40# but the spiner shows them at 25#!!!!mmmmm not sure what ive done here needs tweaking i think!!

hillbilly61:
Let me ask this. If I have 1/2 dozen arrows that I know shootand group good for me, why can't I just make the tester. Then put the finished arrow on the tester, mark the spot the pointer goes to. I'm assuming that they will point to diff. marks ,but be within a reasonable amount of space apart. Then use this mark as your target spot for the shafts you make? Just a thought.

Genghis:
Perfect hillbilly - this is one of the principles of understanding spine.

You don't actually need to measure spine against a scale if you have a known arrow to compare with - just make a mark and use it to find other arrows that match.

Scaled spine testers come in handy when you have more than one bow needing differently spined arrows or build arrows for others - then you need a marked scale.

 :)

Navigation

[0] Message Index

[*] Previous page