spine, why is too stiff bad?

[Dook]

Dook,

There is only downside to that approach....
When you stop hitting him where you want to, diagnosing the problem requires others. If you aren't hunting in BFE, that may not be a problem for more than a morning hunt.

You are wurrying me again, when I get to Florida I will be in BFE for 4 days. When I get to Illinois I will be in BFE for 5-1-2 days.

I need help.

[Stripa Swipa]

Self reliance cannot be bought, Brutha.

[Dook]

Yep, And I was just joking around. If that ole POS PSE I had never failed me, - I don't think the new to me switchback will.....

But I will still have an extra string, and any accessories that can fail me.

[Palmetto Bug]

After looking at a couple of the slow mo's, it looks like the shaft pretty much just follows the broadhead. Even though the back end does a lot of whipping around, the BH is relatively stable. With that in mind, I can understand how some flex could correct for some imperfect string movement, especially with a regular rest. The slow mo also makes it look like it would be best to max out the FOC.

It's also easy to understand how it could help with penetration.

Thanks for the replies.

[tradorion]

Now if you are going to go there with the "helps with penetration" you need to start a new thread and ask Stripa about Extreme FOC on overly spined shafts....

[Catdaddy]

Now if you are going to go there with the "helps with penetration" you need to start a new thread and ask Stripa about Extreme FOC on overly spined shafts....

I agree with a new thread on penetration. Besides arrow flight, I always heard bleeder blades helped with penetration by reducing drag on the arrow shaft. That seems contradictory with Dr. Ashby's choice of broadheads(2 blade).

[Stripa Swipa]

I think it helps to isolate these factors for discussion so there is a better understanding of each factor's contribution to the net result.....BUT.... the net result is what matters at the moment of truth. As for bleeders, they may inhibit penetration above and beyond the benefits of lowering friction on the shaft. Ashby is a proponent of the single bevel two blade and his conclusion is that it opens a bigger hole than a double beveled two blade. Everything you gain in one area, creates some kind of loss in another. I lost a deer shooting a two blade this year that was shot in the lungs at 12 yards, producing tiny amounts of lung blood in a very thick area. Lots of folks shoot multi blade heads for that reason and they have a great point. I would have gotten plenty of penetration with a big snuffer on a 600 grain package and would have likely retreived my deer in this case. I'm as lost as the next guy.

[Catdaddy]

As for bleeders, they may inhibit penetration above and beyond the benefits of lowering friction on the shaft. Ashby is a proponent of the single bevel two blade and his conclusion is that it opens a bigger hole than a double beveled two blade. Everything you gain in one area, creates some kind of loss in another.

The reason I mentioned that is that I shot 2 blade Muzzy Phantoms(COC) for a while at hogs. When I switched to a 4 blade(chisel point), I got considerably better penetration. Both heads were razor sharp and shot out of the same bow.

I realize other variables could have come into play, but my results lead me to believe arrow friction plays a bigger part in penetration than I first thought.....especially since coc are suppose to be better than chisel points per studies/tests.


I also think all this is a mute point when we are talking whitetails. They are thin skinned animals compared to hogs and African game.

[Stripa Swipa]

No doubt.

Another reason carbon is great as a shaft material is the ability to lower shaft diameter while maintaining spine which lowers friction on pass through. If there were any decent engineers in the arrow building world, there is a bunch more that could be accomplished in this area. Arrow shafts are low tech in the carbon fiber products world.

[Dook]

I wish they were priced as Low tech.....LOL>