Author Topic: One more time ! Glass thickness !  (Read 1771 times)

Offline Forwardhandle

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One more time ! Glass thickness !
« on: February 04, 2019, 05:26:45 PM »
Im calculating my stack thickness using .030 Gordons glass & I have heard different theory's using the .030 vs .040 etc ,so Im adding about .010 over the same stack thickness if I was using .040 glass to companstate for the more limber limbs ,for you guys that used .030 glass in a stack does that sound right ?
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Offline Crooked Stic

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Re: One more time ! Glass thickness !
« Reply #1 on: February 04, 2019, 10:34:23 PM »
gonna be really close.
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Offline Forwardhandle

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Re: One more time ! Glass thickness !
« Reply #2 on: February 05, 2019, 07:16:28 AM »
Ok thanks Mike , Kenny thought the same thing , Im trying to use up left over material , and mixing and matching to get a bow !
If you fear failure, you will never try ! But never except it!!

Offline beachbowhunter

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Re: One more time ! Glass thickness !
« Reply #3 on: December 31, 2019, 01:18:59 PM »
I am experimenting with my first recurve TD limbs for a 60" bow and my first set came out too heavy to even string. I used 0.04 glass with a total stack of around .240 (I think).  Generically, to safely get a limb between say 45 and 30# would you use 0.03 glass?  I just want to be able to string and test it!  :knothead:  Any rough stack ideas, thinking parallel lams as a start.
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Offline Forwardhandle

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Re: One more time ! Glass thickness !
« Reply #4 on: December 31, 2019, 03:06:29 PM »
You might want to ask Kennym he is pretty darn close on stack guessing, I have used .030 back glass with .040 belly glass on a couple sub 50lb bows with no issues !
If you fear failure, you will never try ! But never except it!!

Online jess stuart

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Re: One more time ! Glass thickness !
« Reply #5 on: December 31, 2019, 05:12:51 PM »
With identical stacks using .030" on the back .040" on the belly.  Same stack with .040 back and belly gain about seven pounds.  Hope that made sense.

Offline Mad Max

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Re: One more time ! Glass thickness !
« Reply #6 on: December 31, 2019, 06:05:11 PM »
I am experimenting with my first recurve TD limbs for a 60" bow and my first set came out too heavy to even string. I used 0.04 glass with a total stack of around .240 (I think).  Generically, to safely get a limb between say 45 and 30# would you use 0.03 glass?  I just want to be able to string and test it!  :knothead:  Any rough stack ideas, thinking parallel lams as a start.
I say .030 is what you need ! I made plenty T/D's with .030 glass !
for the stack? .200 to .240-----------.225 will be exactly 40# give or take 10# :bigsmyl:--- :dunno:
I would rather fail at something above my means, than to succeed at something  beneath my means  
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Offline Mad Max

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Re: One more time ! Glass thickness !
« Reply #7 on: December 31, 2019, 06:42:00 PM »
BJansen Stack Calculator said
For a stack of .240= 60# let's say
For a 40# bow the stack would be .210
Hope it gets you there :pray:
I would rather fail at something above my means, than to succeed at something  beneath my means  
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Online kennym

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Re: One more time ! Glass thickness !
« Reply #8 on: December 31, 2019, 08:35:37 PM »
Don’t see what the weight of this one was but usually I think recurved run .001to .0015 per lb

Ya kinda need to get the weight on that one figured out...

Send it to Roy and have him string it for ya!! :)
Stay sharp, Kenny.

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Offline beachbowhunter

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Re: One more time ! Glass thickness !
« Reply #9 on: January 02, 2020, 01:18:23 PM »
Thanks guys. I need to pick a stack and go for it. The set I built scares the crap out of me when I try to string it!  Longbows are safer  :o
Ishi was a Californian                   :cool:

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