Fast flight vs. dacron - changing arrow spine?

[Richie Nell]

Am I seeing things or did my ALL of my arrows show a stiffer spine (nock right for righty) when I tried a dacron string on my fast flight Black Widow?

Could that be possible?  I think it is

What do you think?

[Doss0311]

Well, I'm pretty new to traditional shooting, but from what I've read fast flight bows require a stiffer spine.

You gain velocity with fast flight but need more spine.
You lose velocity with Dacron but need less spine.

So your arrows tuned for the fast flight string would be overspined for Dacron.

But like I said, thats all from 100% reading and 0% experience.    

You could try putting on lighter points.

[A.S.]

Definately you will see stiffer spine with a dacron string. Basically your bow doesn't shoot as hard with the dacron, so you need a lighter spined arrow-or at least heavier points to weaken the spine of the shaft.

[Cherokee Scout]

Yes, no doubt. I have done a lot of testing of strings, silencers, speeed etc. The dacron will be slightly slower 4-5 feet per second, and will require a lighter spine or heavier point. Caution.....sometimes the dacron is thicker with thicker serving and some of the problem of spine is because the nocks fit tighter on the dacron. But even with thinner serving, you may need a lighter spine, longer shaft or at least a heavier point. But, on many recurves, especially Widows, they are tons quieter with the endless loop dacron. The flemish dacorn is not as quiet as the endless loop dacron.
I have seen it repeatedly on short Widows, with fast flight they are loud, a lot of slap on the limbs, I change to an endless loop dacron ($4 string) and the bow is very quiet. PSRs ands TFS especially.
My PSRs are as quiet now as any bow I have ever shot.

[dino]

Originally posted by SRTA:
The dacron will be slightly slower 4-5 feet per second, and will require a lighter spine or heavier point. Caution.....sometimes the dacron is thicker with thicker serving and some of the problem of spine is because the nocks fit tighter on the dacron. But even with thinner serving, you may need a lighter spine, longer shaft or at least a heavier point.

Pretty good info right there! dino

[Bjorn]

If both strings are equally well made I usually will have to go up a weight class to get equally good flight. If shooting 55-60 I would need 65-70 with a non stretch (D97) string.
I have found that most of my bows will shoot better at a slightly lower brace height too with the non stretch strings although I have no idea why; maybe SRTA or someone equally knowlegable will chime in.

[LBR]

It can vary depending on how the string is made, what material it's made from, how many strands, nock fit, etc. etc. etc. but usually with the FF type materials you'll get better performance and may need a stiffer arrow--especially if you are borderline in spine to begin with, and/or your bow is picky about spine.

FF type materials have a lot less stretch than dacron, so you can usually shoot them at a lower brace height without added wrist slap.

Chad