The other day I had a chance to stop by 3 Rivers and shot some of their bows. I have to admit that I could really notice a postive difference in the model with the carbon limb lamination. I am curious as to what your experiences are in working with it, good, bad, tips, etc.? Also if you can please advise me of some sources for the stuff? Thanks in advance.
I found that the use of 0.20 carbon in my limb design is a real advantage.I have found it to be 6-8 fps faster.Also a more consistent limb.Bingam has the 0.20 carbon.
Michael, can you tell us where you place the carbon lam in the limb.
Also, has anyone used Bearspaw SpeedTuff. It is a .015 core laminate. I have heard mixed emotions on it, but I am going to give that a try as well.
Thanks
bjansen,When working with clear glass i use it as a core.When i use it with dark glass i put it under the glass on the belly side.
QuoteOriginally posted by legends1:
bjansen,When working with clear glass i use it as a core.When i use it with dark glass i put it under the glass on the belly side.
Do you find that the further into the core you place the carbon the less benefit you gain from it?
Are you making a single or double carbon limb?
Whats the benefit to adding black glass over the carbon since the glass is so much heavier?
Do you use the uni stuff from binghams or the custom 45* layups?
Why use it on the belly and not the back of the bow?
We have seen a small advantage to puting the carbon under the glass on our limb design.I use a single carbon of .020.The glass dosnt have anything to do with the reason for putting the carbon under ,its just that i find it a advantage to get it as close to the belly as i can.Again,This is what i have found in my limb design.
i just built a 35 lb longbow for a guy with a shoulder injury. i put a piece of carbon under the back glass and i must say the bow seems pretty zippy for such a light weight bow
I use carbon on the back only. A few fps gain and a 20-25% stack reduction. Have not used carbon anywhere else in the stack. See no need to cover it glass on the back. Been hunting with one for the last 3 years and it has stood the test of over 200 days afield. I don't baby my bows :)
I would think that to have the full benefit of the carbon, you would want to use it inplace of the the glass on the back only......
I see i made a mistake on my description.I didnt mean to put under the belly i meant under the glass on the back.Sorry to confuse anyone.I was thinking one thing say'n another.Sorry guys!
All the literature I have read states that carbon does much better in tension than compression. Therefore closer to the back is better. The last Carbon and carbonized-bamboo bow I made sure does zip the arrows.
Darren
Legends; U have PM
Bow-n-head, i dont have it try again.
OK Mike. try again.
Mike; 2 PMs sent. Any luck?
Nope,didnt get ether one.Whats up with that? I sent you one.Send to my email.
legends if you are getting 6-8 fps faster using carbon with glass over it you must have on heck of a design. :saywhat:
crooked stic,
When i first startd play'n with the carbon i was not sure from what i had heard if it was going to be a waste of my time, but had to try for myself. I used it in all areas of the limb stack and also tryed .030 and .020.I found it was of no advantage in my limb design to use the .030.Didnt like the stack i felt in the limb.I also tried it in combo with bamboo, but found no advantage of one wood over the other.In all the testing i found it to be 6-8 fps with the .020 carbon under the glass on the back.When moved to under the venveer when using clear glass it lost about 2 fps on the average.The othere advantage i found was the fps of consistency was a advantage with the carbon limb when compared to the none carbon limb.Also as i said before,this is all the testing in my limb design.Not to say you will find the same advantage in all limb designs.
Are you getting this in a recurve or longbow?
I only build recurves have no knowledge how it would work in a longbow .
i read somewhere that black glass was faster than clear glass. the claim i read stated that the black glass was 6-8fps faster. is there any truth th that or has it even been tested?
the only reason i ask is cause legends said that the black glass was faster, but thought it was a result of the carbon placement. i'm just wondering if it wasn't so muck the placement of the carbon, but more the type of glass.
Black glass may give you 3 fps.
Legends it works better in a longbow. I just have not heard of anyone getting those kind of gains with carbon in a curve especially with glass over top of it.
eman614, You bring up a good point,That is a good question.I only found it to average 2 fps gain. Maybe it could be the dark glass. Ill have to check that out. Ill put the carbon in the middle of the stack like i do the clear glass and see what i get.Ill get back to you.
hey i was just wondering how much poundage does carbon add?? I mean do you just count it as a regular lam? I may just build me one but just kinda a guide line idea??
Double the thickness of the carbon plus 5 lbs.
Recurve using 20 on the back figure it for forty plus whatever it takes to make 5 lbs. >001 per lb on mine so I would figure an additional .025 into the stack. So if I mic the stack and it mics an actual .200 I would figure it for .225
God bless you, Steve