Taper laminations

[oldandslow]

What is the purpose of the taper when laminating?
Does a carbon fiber lamination reduce limb thickness back to belly for a given weight?
Does stabilcore work?

[kennym]

I'll get the first one anyway...

The taper is in there to make the bow bend properly. without it you will be weak at end of fades and hinge most likely.

On narrower bows you use more total taper because you have less taper on limb edges.

Each bow design  may use different taper rate due to limb design.

For the other 2 ?s  I haven't used carbon as the gain isn't worth the money to me. Not a speed hunter..
But it's reported you need to reduce stack.

Stabilcore works to give some torsional stability, I proved this to myself with the recurve I just built with the monster hooks on it.  First one off the form a couple years back without it blew up first pull. This one is doing great with it under glass back and belly , except I don't like it...

Edit, I don't like the bow, the S-core is fine...

[Mad Max]

Stabil-kore is awesome, yes it works

[oldandslow]

Thank you gents. Much appreciated.

[Longcruise]

Take two pieces of lam, one tapered the other parralel and clamp them to the edge of the bench.  Bend both at the same time from the tips and see how they bend,  Keep going until one of them breaks and see which goes first.  Your probably already know the answer. 

[Mad Max]

That was a very good answer long 

[Roy from Pa]

parralel?

I'm still trying to fugger out what that is:)

 

[Crooked Stic]

Agreed on a short fade that dont have a long thin taper tapered lams are easier on it. But if you build the fade or wedge that can work some you will be okay.
I believe in stablecore (would be better with a 45 % lay up tho.
Carbon works too many $$ for me.

[oldandslow]

Agreed on a short fade that dont have a long thin taper tapered lams are easier on it. But if you build the fade or wedge that can work some you will be okay.
I believe in stablecore (would be better with a 45 % lay up tho.
Carbon works too many $$ for me.

I do not understand 45% lay up

[B-JS]

45/45° Fiber orientation, i guess.

[oldandslow]

45/45° Fiber orientation, i guess.

Lol. What does that mean?

[Longcruise]

45/45° Fiber orientation, i guess.

Lol. What does that mean?

Looks like this.   https://compositeenvisions.com/commercial-grade-carbon-fiber-fabric-plain-weave-3k-5-7oz-193gsm-with-web-lock-stabilization/

[B-JS]

45/45° Fiber orientation, i guess.

Lol. What does that mean?

The fibers in a Standard Glass Laminate are all in the Same Direktion.
0°

The fibers in Stabilcore are halt linear and half crosswise.
0°/90° that gives a little bit torsional stability.

If you want maximal torsional stability, the fibers should be 45°/45°

[oldandslow]

Righto! Got it.

[Bowjunkie]

Kenny, you said "On narrower bows you use less total taper because you have less taper on limb edges."

Did you mean to say, 'On narrower bows you use (more) total taper because you have less taper on limb edges.' ?

[kennym]

OOPS yes sorry!  Glad you caught that misinformation. Fixed it thanks!

[Roy from Pa]

OOPS yes sorry!  Glad you caught that misinformation.

Someone gotta keep an eye on ya ole timer:)

 

[kennym]

I'm surprised you didn't catch it Pops!

[Roy from Pa]

I don't make gwass bows:)

[Crooked Stic]

45 like the carbon is cut.  I expect the carbon is laid up in sheets and cut at that angle. That will have some waste.
The stable core prolly laid up in long rolls.