Bare shafting flight arrows

[willie]

does that oceanspray tip weigh much?
what are you using for a backstop? waiting for the snow to melt is getting old here

[DC]

I think it was 8 grains an inch more than the bamboo if that tells you anything. I use a box full of plastic bags in the shop and a Bulldog target outside.

[Selfbowman]

How long is your arrow? Arvin

[DC]

28" here's a pic of the tip. I heat treated it.

[avcase]

It looks like the tip burned up a bit upon re-entry into the atmosphere!  Haha!

This kind of tuning does require some amount of trial and error. The minimum spine requirements are effected by the archer’s shooting and release. One archer may get clean Flight with a 30# spine arrow out of a 50# bow, and a different archer may get the opposite results.

Alan

[Selfbowman]

350 is a long way down the road for me. I've only tried once and the best I got was just under 200 depending on the measuring method. That was with about 10 GPP and a 38# bow.
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I think that's a pretty good distance with that set up. Arvin

[Badger]

  I found a 6ft 2x2 doug fir at lowes today. It has straight grain and a specific gravity of close to 80, heads and shoulders denser than any doug fir I have ever worked with. Can't wait to get it cut up and make some arrows. I hope it doesn't let me down. I think I can get about 32 arrows if I don't screw up

[Selfbowman]

Steve I ordered a dozen 11-32 shafts spine at 100 . And a dozen at 75-80 spine yesterday. I am thinking I can get them pretty thin on the ends .also dug furr. Wt. 450 gr. Arvin

[Selfbowman]

Heck Steve build a bow out of that board. Arvin

[Badger]

    Arvin, the grain is so straight I am thinking about it. Same density as most osage but a whole lot stiffer

[avcase]

Steve,
It seems like you have an exceptional board there!  If you get a chance, can you create a straight dowel from it and do a spine/deflection test on it?  If it is truly exceptional in stiffness, then it has the potential to add much more distance to your shots as arrows rather than a bow.

Alan

[willie]

steve, I could send you the stiffness calculator I made in the other thread. you could test a ripping or the whole board without cutting if you preferred.

[Badger]

  Willie, yes send me the stiffness calculator. Does it come with instructions??

  I already cut the board up in 5/16 squares, pretty good by feel but not exceptional. I haven't actually measured it but I am guessing 5/16 is about 50# spine. Going to rough a few out tomorrow and check weight and spine.

[willie]

will send soon I hope, I need to add a few instructions first.

If anyone else would like a copy, please PM your email address. it is an excel sheet that you can use alongside a simple bend test on any round, square or rectangular "beam".

it has inputs for whatever weight you choose to create deflections, whatever span you choose, and reads out in MOE.

if you can weigh the mass of the ripping, it can also output the specific gravity and the stiffness relative to that s.g.

[avcase]

Steve,
Is it fully dry?  I’d expect much higher spine.

Alan