ASL Fiberglass Stack ?

[Kirkll]

" That seems an extremely inefficient way to make a bow limb. Assuming you wanted decent performance out of it, anyway."

Getting Decent performance in that type of design is tough to do with no back set or reflex in the bow. But... with the use of long power lams, tip wedges, and the right taper rates it can be improved a lot.

[mmattockx]

Getting Decent performance in that type of design is tough to do with no back set or reflex in the bow. But... with the use of long power lams, tip wedges, and the right taper rates it can be improved a lot.

I'm not talking about the ASL design itself, I was talking about putting a glass lam mid stack instead of on the outer surfaces of the limb. The ASL is what it is in terms of performance, this is just making it worse than it needs to be.


Mark

[Kirkll]

Getting Decent performance in that type of design is tough to do with no back set or reflex in the bow. But... with the use of long power lams, tip wedges, and the right taper rates it can be improved a lot.

I'm not talking about the ASL design itself, I was talking about putting a glass lam mid stack instead of on the outer surfaces of the limb. The ASL is what it is in terms of performance, this is just making it worse than it needs to be.


Mark

Yup....kinda like putting lipstick on a pig.

[simk]

well, a customer lately showed me his glass backed all bamboo bow  with a thgin strip of carbon towards the belly. well, that of course does not make a lot of sense imho, it has nothing to do with the original all bamboo bow, its a glass backed and carbon bellied bow with a useless strip of bamboo on the belly,.....

[Watsonjay]

I still dont see the benefit

[Kirkll]

I still dont see the benefit

There is none...

[Stagmitis]

The benefit to having glass under the wood belly is to minimize set-that's all- I build quite a few bows like this

[Kirkll]

The benefit to having glass under the wood belly is to minimize set-that's all- I build quite a few bows like this

Now that right there makes sense to me...

[Watsonjay]

Not say that doesn't work, but it still doesn't make sense to me. The wood on the belly side of the glass still has to compress just as much as it is still bending as much, so would the cells of the wood still remember that compression and have set?  Can someone please dumb it down for me how this functions. Seems as if the glass were on the outside it would work. Sorry for my slowness.

[mmattockx]

Not say that doesn't work, but it still doesn't make sense to me. The wood on the belly side of the glass still has to compress just as much as it is still bending as much, so would the cells of the wood still remember that compression and have set?  Can someone please dumb it down for me how this functions. Seems as if the glass were on the outside it would work. Sorry for my slowness.

You are correct. Having a FG lam under the wood belly lam will help reduce set, but it's far more efficient to just put the FG on the belly in the first place.


Mark

[Stagmitis]

Mark when you get close to the performance of an all glass bow with the look and beauty of a Selfbow I think it's pretty cool. Clear glass over a wood belly doesn't come close and you lose speed with clear anyway 😎
 
WatsonJ I hear you:)

I'm not an engineer and can't explain it either-but having built many with the glass under the belly and without I can tell you I would not have reached speeds in the low 170's without it.