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Main Boards => The Bowyer's Bench => Topic started by: Flem on July 27, 2019, 02:21:00 PM
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I have a nice piece of Eastern Red Cedar that I sliced up for lams. I am wondering if those of you who have made laminated Bow's with the stuff had to adjust stack thickness? It's pretty soft and lite, but I have seen where folks have made nice looking Bow's with the stuff.
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Never used it but I would think veneers would be the way to go.
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Yes make the stack a little bit thicker and or wider..
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Well I guess it depends on glass or wood. :bigsmyl:
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Brilliant sticky-pops:)
:thumbsup:
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It's going in a ASL. I'm pretty much stuck on them. So it's going to be a glass sandwich. Guess I'll have to experiment as to how much thicker. Could be a fat mother! Was thinking about working up an equation with a known wood's properties as a baseline and adjusting for the ERC. Have no idea if that's a good idea or not?
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I would not even think cedar would be strong enough for care. But as I said never used it before.
Tanks Roy I am briiiant at times. :banghead:
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It's going in a ASL. I'm pretty much stuck on them. So it's going to be a glass sandwich. Guess I'll have to experiment as to how much thicker. Could be a fat mother! Was thinking about working up an equation with a known wood's properties as a baseline and adjusting for the ERC. Have no idea if that's a good idea or not?
Flem Flam what are you talking about, you posted this earlier :dunno: :) :tongue:
I've got a book I would like to pass along to someone who could use it. The only catch is you have to be nuts enough to want to build an ASL type Bow :banghead:
If you like boring, inefficient Bow's, you might glean some useful info from this book. If you are currently torturing yourself building ASL's, you might not learn anything new.
I found it good for bathroom reading(clean hands only!)
If you would like it, P.M. me your address and I will send it along
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Thats called sarcasm. My attempt at humor. I only make Hill style Bow's.
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I have a Dave Johnson ASL, and he uses ERC cores exclusively. I've got a few very popular brand ASL bows with yew, bamboo, and elm cores as well.
The Johnson is fast, and light as a feather. It's noticeably lighter weight than all the rest. And also has the least handshock.
I don't make bows, but I believe ERC makes a very good bow limb when done right. I'm beyond impressed with this bow.
I believe Steve Graf prefers it as well at the time of writing his book. Which is a great read by the way.
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Hey Chase, you own some calipers by chance? :goldtooth:
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I do. I suppose you want measurements huh? :goldtooth:
I'll be away from home till tomorrow evening. PM me a phone number or email and I'll help however.
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Flem, I do this a lot with tri lams. I use either the specific gravity or the stiffness as a comparison to a known thickness. I think it’s stiffness(bending resistance or MOE) is the best for comparing core type material.
Just take a ratio of the known material MOE to ERC’s MOE and multiply that ratio times the known thickness. It won’t be exact but will give you a good place to start.
PM me if this doesn’t make sense.
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I've used erc as a core material in a trilam.
I made the bow about 1/4" wider than if I were using red elm for a core lam.
And made the lam about 1/32nd thicker.
Now don't go expecting to make 60 pound bows with erc..
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Cool! Thanks you guy's! How did you like the ERC as a core, Roy?
Ben, that's kind of what I was thinking of doing. I was not sure about using the MOE or the modulus of rupture. Thanks for the voice of experience.
I also need to thank Chase (limbshaker), what a nice guy! He took measurements and photos of a beautiful Dave Johnson ASL he owns and sent them to me. I think the biggest problem I'm going to have is sealing the wonderful aroma of the Cedar away where I can't get a sniff at it.
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It's pretty, smells good, light weight, and fast.
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Flem, make sure you report back how it comes out.
I found out that yew usually ends up being about 10% lower draw weight than cores with walnut, black locust, bamboo, and maple (which all seem to be about the same) in my ASLs. That said, the yew bows have been my favorite with the least hand shock. I would think ERC would be similar.
-Dave
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Though I would solicit opinions from you guy's on color combos. I know what I like, but I've been told my taste is questionable. I'm not ready to put this Bow together, but I laid up some glass to play with. The light color one is actually close to Ivory, not white.
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Forgot one
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First one.
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Clear Glass
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Homey don't make no clear.
Although clear would look nice!
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What is the green stuff?
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The green is a semi translucent experiment.
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:saywhat: So if the green works you tell us about it right?
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:saywhat: So if the green works you tell us about it right?
You bet!
It will work, I just don't know if it's going to look like poo or not.
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I'm liking that ivory but there all nice :thumbsup:
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Ha what till you see the green in the one I am about to glue up. :scared:
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I know ryan benoit of benoit bowcraft uses erc. Very beautiful bows and it seems to work good for him [ You are not allowed to view attachments ]
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Sweet looking bows there 88.
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Sweet looking bows there 88.
Ive been considering trying one just to see how the erc cores feel. I shot a pair of longbows a few weeks ago that were identical except one was boo core and the other walnut and honestly liked the feel of the walnut one better. I want to get set up to make some asl's just so i can experiment on different cores
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Edge grain walnut makes a good core. Just be sure to get plenty of glue on it.
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X's 2 on plenty of glue on the walnut.