Another UL vs ULS question

[monterey]

Did not want to run the other thread into the ditch, so am posing this question on it's own.

I understand the difference between the two but wonder what designs really benefit from uls?

My builds are (so far) all flat longbows or longbows with some small reflex along the most part of the limb.  Usually reflexed in the .75" to 1.25".  No R/D designs.

Is there any need or benefit to using uls with these design parameters?

[rmorris]

I am under the impression that uls glass is better in wide limbs such as a recurve. I believe it helps keep the limbs stable and more resistant to twisting. Then again I only build the long bows so what do I know.

I do use uls for accent strips in risers, I do believe it provides extra strength  from longitudinal cracks in a riser.

[jsweka]

I've heard/read the same thing as Ralph - use in recurves but not needed in longbows.

[Buemaker]

I do not know when they started to produce the ULS glass, but if they first started in recent years millions of recurve bows must have been made before that using the UL glass without problems? Bue--.

[Buemaker]

I found these data sheets that explain the different production methods of the laminates.
By the way is the ULZ used to any degree? Bue--.
 http://www.gordoncomposites.com/downloads/downloads.html

[Robertfishes]

I have some ULZ glass but have not used it. It is not clear..I would say its opaque..I may try it with some red elm tapers in the future and camo paint bow.***edit 3/18/13***I looked at my glass stock and I marked the glass "S" glass..not ULZ, I bought this glass over 3 years ago from OMC and I think its the same as ULZ, it seems stiffer than the other glass I have in stock

[jess stuart]

I have heard the ULS doesn't help with twist but, does help with the problem of the glass sometimes splitting around limb bolt holes.  Can't really say have never used it.