Lamination formula

Rocriver · May 06, 2020, 11:47:19 AM

Another question.....I was looking on bing hams site and stack for one bow(think it was pronounced R/d?) called for 2 glass, 1 parallel, 1 regular taper, and one reverse taper. Same taper on both. Wouldn't a reverse taper on top of another taper just cancel each other out and be same as a parallel of that thickness? Or am I just not reading something right? Thanks for clarifying this and putting up with my endless questions.

monterey · May 06, 2020, 12:58:19 PM

Quote from: Rocriver on May 06, 2020, 11:47:19 AM
Another question.....I was looking on bing hams site and stack for one bow(think it was pronounced R/d?) called for 2 glass, 1 parallel, 1 regular taper, and one reverse taper. Same taper on both. Wouldn't a reverse taper on top of another taper just cancel each other out and be same as a parallel of that thickness? Or am I just not reading something right? Thanks for clarifying this and putting up with my endless questions.

That's a question that has been asked many times throughout the universe but never satisfactorily answered!

Flem · May 06, 2020, 07:16:43 PM

I would venture to say, YES, but hey don't take my word for it, ask Bingham's

buddyb · May 06, 2020, 08:40:59 PM

Ask Bingham and then let us all know.

Rocriver · May 07, 2020, 04:10:53 PM

"Hi Shane,

Thanks for your question. I assume you are making the pronounced td longbow. Yes, the overall limb is parallel. It is a long story but the taper and reverse taper is just how our design was developed. When we make kits, it is much easier to hit the exact thickness with a taper rather than all parallels. If you are making your own laminations, you can use all parallels."

Answers my question. Super nice folks at binghams. I guess I'm hooked again as I ain't figured the first bow yet and already planning second one. Lol. May as well just buy enough lams for 5 or 6 bows. I'll make room for them.

Flem · May 07, 2020, 04:24:06 PM

OK, now I know I just seem nasty but, "it is much easier to hit the exact thickness with a taper rather than all parallel" So I guess its easier to mill a taper than a parallel? And it's easier to sandwich two tapers together, than use one parallel? I'm having a hard time counting all the ways that statement boggles the mind.

monterey · May 07, 2020, 07:50:42 PM

Quote from: Flem on May 07, 2020, 04:24:06 PM
OK, now I know I just seem nasty but, "it is much easier to hit the exact thickness with a taper rather than all parallel" So I guess its easier to mill a taper than a parallel? And it's easier to sandwich two tapers together, than use one parallel? I'm having a hard time counting all the ways that statement boggles the mind.

Yeah, I'm not getting that either but at least it's an answer. It should be pretty simple to look at the Bingham stack chart and figure out how to get the same thickness with one or two parallels.

jess stuart · May 08, 2020, 03:56:12 PM

Slide the tapers in or out and the thickness changes. I often slide my taper to get my exact required thickness at mid limb. I record butt, mid limb, and tip thickness and personally feel butt is the least important of the three.

monterey · May 08, 2020, 05:29:07 PM

Jess, I see what you are doing there and see it could be useful in certain circumstances. Not applicable in the case of long ASL designs though.

Crooked Stic · May 10, 2020, 08:41:08 AM

Two tapers one reversed is gonna = parallel all day long and then some. But like Jess said slide them one way or the other and they change overall thickness.

Flem · May 10, 2020, 02:48:37 PM

Marketing, it's how you sell two items instead of one.

monterey · May 10, 2020, 08:53:57 PM

Flem, you're such a cynic.

Flem · May 10, 2020, 09:10:03 PM

Quote from: monterey on May 10, 2020, 08:53:57 PM
Flem, you're such a cynic.

Don't I know it. Life was so much simpler when I was oblivious.

monterey · May 11, 2020, 12:21:41 PM

Unfortunately we all (most of us???) Grow up eventually.