Stabilcore

[jess stuart]

Stabilcore where are you putting it in the stack.  I have always tried to put it closest to the back.  We'll except when I get in a hurry and put in the middle or closer to the belly once or twice.  Do you think it makes a great deal of difference?

[B-JS]

Well, yes.
If you put it closer to the Center, the black stripe in the Sideview is closer to the middle. 
I don't see much benefit in using this.
No matter where in the Stack.

[Crooked Stic]

I to have not seen very much advantage using itbut I would think closer to the tension side.

[garyschuler]

When I used it. I put it in the center on top of the core lam on the backside of the limb/bow. My personal preference.

[Kirkll]

I've used it for years now on everything except D shape long bows. best location for stability is right under the glass, or veneer using clear glass. I prefer the back side myself. I have built bows with 2 layers of stable core alone on the back with no glass at all, and had the same stability as bias weave carbon. Works excellent on light weight recurve limbs.

It's a butt ugly looking backing though... i sprayed a flat black paint over it.   

[jess stuart]

Thanks for the input everyone.  I too have been using it for several years now Kirk.  I feel it has some positive benefits but, I would like maximize the benefit with the best place within the stack.

[Birdbow76]

I've built a few recurves with it and don't think it makes a difference at all.

[Kirkll]

You will always have some guys saying it doesn’t do much good, but those guys are using it in the center of the limb in the neutral plane.  Hell …. Even carbon does no good in the center of a limb. The closer to the glass the better.   it also depends on your limb design on how much benefit you get from the stuff.

I had a 30# recurve with a radical hook one time that I couldn’t hardly keep a string on it. It was seriously squirrelly…. So just for fun I put it back in the form and put a layer of stable core on the back. Of course it brought the draw weight up considerably…. But this little experiment was an eye opener… that set of limbs that was destined for the burn pile turned out to be rock solid torsionally after adding that stable core to the back, and had great performance. I painted the limbs and sold them to a guy 5 years ago, and they are still going strong….

Don’t be afraid to experiment a bit… you might be surprised what you find.    Kirk

[Crooked Stic]

You ask the best place in the stack? Its been proven that composites work best close or on the outside in a bow. Prolly why we dont put glass under the wood  no doubt the stablecore be betteron the out side or just under the glass. If you like that look. Prolly not. So right under the veneer. On the tension side

[garyschuler]

Funny thought, on a 2 lam recurve limb, not counting the .030” or so for the veneer’s, That would place the Stabilcore just above center in the stack under the veneer in the back side of the limb. Not so on a Tru 4-5 lam ASL longbow though. Just a thought to ponder in the gray space between the back if your skull and yer eyeball’s !!!

[Crooked Stic]

Why you need it on ASL?

[garyschuler]

I used it only as a visual , makes a nice contrast in the limb .
,

[garyschuler]

I think 🤔 am about to get blasted. !!!

[Crooked Stic]

I have used coretuff in longbows for stripes soo

[garyschuler]

Well, good, I am going to blame the flame on you !!!!

[Crooked Stic]

Isnt uniweft about the same as stabilcore only thicker ?

[Stagmitis]

Stic on an ASL the back is responsible for holding more backset than the belly- a woven material is stiffer than a linear one- aside from a bit of weight savings that’s why carbon on the back makes a faster bow- less set and more retained backset under load. I wish they made a woven glass back in standard thicknesses like in the old days

[garyschuler]

My 2 cents here only here. I have found that using Carbon in a bow, the cost versus the gains are not noticeable enough for me to use it. The pro’s versus the Con’s just don’t add up to me. Again my 2 cents only, if you like and use it, then that is great .!!

[Kirkll]

My 2 cents here only here. I have found that using Carbon in a bow, the cost versus the gains are not noticeable enough for me to use it. The pro’s versus the Con’s just don’t add up to me. Again my 2 cents only, if you like and use it, then that is great .!!

Where a bias weave, or even this twill weave carbon backing really shines is in light draw weight recurve designs with radical hooks. With the Super hook recurve designs, it's almost mandatory belly and back to pull it off..... It's more about stability than speed.

The only time you are going to see any significant gains in speed using carbon in a long bow is using Uni-carbon belly and back with lighter weight, stiffer core materials like zebra wood. The fastest D shaped long bow i've seen tested was a double carbon with bone dry hickory cores..... 200 FPS at 28" draw 10 gpp...(WTT 3)   But... those hot rods are not known for longevity either....

I've built some pretty hot ones myself with Zebra and Paduke, or wenge cores, but i never got anything over 200 FPS until i got to 30" draw lengths at 10 gpp, and those were glass bows, not carbon backed....

That damn Uni carbon splinters too easily to be very practical for a hunting bow. i do not recommend it at all to my customers for the sake of an extra 3-4 FPS . Too expensive to mess with IMO, but some guys just gotta have it...   Kirk

[BigJim]

The stabilcore has a small advantage when used as close to the backside as possible.. as has been reiterated above. I have opted to use carbon twill in this location instead and have seen increased advantages in stability. I see no advantages in speed.
BigJim