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Main Boards => The Bowyer's Bench => Topic started by: vth0kie12 on August 18, 2010, 08:31:00 PM

Title: flemish strings breaking
Post by: vth0kie12 on August 18, 2010, 08:31:00 PM
i have been making my own flemish strings, but the keep breaking where about 4 to 5 inches from the end. they seem to be breaking where i finish twisting the bundle in. if that make any since.

the last one i made an effort to make sure both bundles ended at the same place. my strings have been coming out alittle long so i have had to put alot of twist in them.

also the all seem to break on the shot.

12 strains for 37 lbs
Title: Re: flemish strings breaking
Post by: 4est trekker on August 18, 2010, 08:37:00 PM
What string material are you using?
Title: Re: flemish strings breaking
Post by: vth0kie12 on August 18, 2010, 08:41:00 PM
pretty sure its brownell b-50   using to different colors
Title: Re: flemish strings breaking
Post by: Dublin Joe on August 18, 2010, 08:52:00 PM
Are you scraping the belly with the bow strung?  If so you may be knicking the string with the scraper.
Title: Re: flemish strings breaking
Post by: red hill on August 18, 2010, 09:11:00 PM
The few flemish twists I made had one loop to the top nock and a bowyers knot for the bottom. I didn't have to twist to adjust string length.
Stan
Title: Re: flemish strings breaking
Post by: vth0kie12 on August 18, 2010, 09:29:00 PM
its on a old wing recurve ... i haave seen the ones with the bowyers knots i just never really got how to do those
Title: Re: flemish strings breaking
Post by: DVSHUNTER on August 18, 2010, 10:02:00 PM
try making them shorter so you are not twisting them as much. Good luck
Title: Re: flemish strings breaking
Post by: DVSHUNTER on August 18, 2010, 10:03:00 PM
try making them shorter so you are not twisting them as much. Good luck
Title: Re: flemish strings breaking
Post by: chrisg on August 19, 2010, 05:55:00 AM
Are you tapering out the threads? I mean each thread should be slightly different in length so that there is not one thick bundle at the join. The join should taper smoothly into the main body of the string. Three ply makes a smoother string and avoid sudden changes in tension that can happen with an uneven two ply. The plies, two or three must each carry the same weight too.
chrisg
Title: Re: flemish strings breaking
Post by: chrisg on August 19, 2010, 05:59:00 AM
oh another thought, are you burning off the loose ends with a flame? That is a sure way to set up a mega failure!Synthetic materials do not like flame. Rather carefully cut the loose bits off with a sharp blade and wax the remaining ends into the string.
chrisg
Title: Re: flemish strings breaking
Post by: Roy from Pa on August 19, 2010, 07:10:00 AM
Doesn't make sense. I've never had a b-50 string break. And 37 pounds is very light so 12 strands would be plenty.
Title: Re: flemish strings breaking
Post by: vth0kie12 on August 19, 2010, 07:41:00 AM
yeah i have been tapering the ends and i have been just leavin the ends hanging. this last time only one of the bundle broke. it seems to always happen on the shot, bu the arrow always flys good and hit with the others.

i agree it should be breaking. everything i have read say that should be a good size string.  i pretty sure it something i am doing wrong. i was thinking it was that i had more weight on one bundle than the other, but this last one i made sure they were the same lenght.


thanks for all the help guys i am just new to all this stuff
Title: Re: flemish strings breaking
Post by: Jeremy on August 19, 2010, 08:02:00 AM
I use 12 strands on my 60# @30" bows...  

Can you post a pic of your strings?

The string groove on you Wing is smooth, right?  No glass slivers to cut the string?
Title: Re: flemish strings breaking
Post by: vth0kie12 on August 19, 2010, 08:16:00 AM
not real sure how to post pics....grooves appear to be smooth
Title: Re: flemish strings breaking
Post by: Jim Dahlberg on August 19, 2010, 09:19:00 AM
When I first started making flemish strings 25 years ago I had strings break similar to what you describe.  You have to be sure to put "back lays" into the string after making the first loop before making the second loop so that the twisting of the second loop takes out the "back lays" in the length of the string.  Hard to explain in words but easy to understand when shown.  Put the first loop over a peg.  Go to the opposite end of the string.  Lay each bundle over itself counter clockwise if you are twisting to the right and laying the bundles to the left while making the loops.  You have to "back lay" the lengths of the string the same number of times that you are going to twist the second loop bundles together.  I prefer 3 bundle strings. I use 22 - 24 twists to make the upper loop then 32 twists to the body for the finished loop.  Then 32 "back lays" as previously described.  Then 12 - 16 twists for the bottom loop and 32 twists to the body of the string to finish.  When finished with the bottom loop you should be able to put your fingers between the strands and run your fingers from one loop to the other with no snarls.  If you have snarls the "back lays" weren't done properly.  Then twist the string 24 times counterclockwise and wax to hold in place.
Long description I know but it solved my string breakage problem.  Hope this helps.
Title: Re: flemish strings breaking
Post by: vth0kie12 on August 19, 2010, 09:36:00 AM
i think i understand what you are talking about and i dont do that. i will try it on the string i am going to make tonight.

thanks for the help
Title: Re: flemish strings breaking
Post by: macbow on August 19, 2010, 09:42:00 AM
Wow Jim sounds like a really good string.

If I had to go to that much work would go back to endless loop strings.

I've never had a simple b-50 string break. I've had some come loose and some get frayed to the point I replaced them, but in 20 years of using flemish never had one break. I agree that less twist is better, but have shot a lot of them twisted tight.

If your using different colours I guess one bad spool can be ruled out.

I've had guys tell me that really old B-50 will sort of dry out and not hold wax.

How many shots would you guess before you have problems?

Since it is in the end of the splice padding the loops won't help much.

Hope you find the solution.
Ron
Title: Re: flemish strings breaking
Post by: George Tsoukalas on August 19, 2010, 09:50:00 AM
It could be that you are twisting one bundle more than the other making one bundle shorter than the other. That bundle would be taking all the strain from the bow. Jawge
Title: Re: flemish strings breaking
Post by: vth0kie12 on August 19, 2010, 11:14:00 AM
the last string i would guess had around 100 to 200 shots on it. i just made it this week when the other one broke.
Title: Re: flemish strings breaking
Post by: Jim Dahlberg on August 19, 2010, 05:42:00 PM
After rereading my first post I meant to say: "lay each bundle over 'the other 2 bundles' counter clockwise" and "put your fingers between the 'bundles' and run your fingers".
I had to learn flemish string making the hard way since there was no one else into making their own back then.  The book I learned from was written by Louis Hochman in 1957, "The Complete Archery Book".  The part that I kept getting wrong in the beginning was the "backlay" process. Thus broken strings. I have since taught many folks how to make flemish splice strings and have never had a broken string after getting the process right.  I have an osage selfbow that I hunted and shot weekly for 7 years with the original string on it.
Title: Re: flemish strings breaking
Post by: traditionalman on August 19, 2010, 09:51:00 PM
Are you sure the string is breaking and not pulling apart If you twist the string in the wrong direction when making it, you are in a sense taking the twist out of the string and making it able to pull apart.. Also make sure you have a least 4 and 1/2 inches of your string
twisted under and all your ends twisted into the bundle.
Title: Re: flemish strings breaking
Post by: Roy from Pa on August 19, 2010, 09:56:00 PM
Geeze Jim. Ya lost me and I've been maken flemish strings for 10 years:) Never had a failure.  

I use 2 bundles of B-50, 6 to 7 or  8 strands per bundle, depending on the bow weight. Lay them out on my string jig, take them off and hold the ends of both bundles even in my left hand. Measure  up 8 inches from the ends and start to twist. I twist the 1 bundle away from me, then pull it back and left over the other bundle towards me. Then keep doing the same till I have about 1.5 or so twisted string. Then I form the loop by bending that together and continue on twisting and pulling towards me till I run out of the tag ends. I'll twist another 10 or 12 times, them clamp that end and do the same to the other end of the bundles. I do the same to each end, then twist counter clockwise and my string just twists up and shortens to what I need. Geeze it is hard to describe how we make a string.
Title: Re: flemish strings breaking
Post by: Lee Robinson . on August 20, 2010, 01:12:00 AM
Post a picture of your strings...both "new" and "broke."
Title: Re: flemish strings breaking
Post by: Jim Dahlberg on August 20, 2010, 09:19:00 AM
Pictures definitely work better don't they Roy.  Guess that's why I recommended the book.  It's got good pictures and a fairly good description if you pay better attention than I did initially!!
Title: Re: flemish strings breaking
Post by: vth0kie12 on August 20, 2010, 09:42:00 AM
def a break. it amost looks like a clean cut. all the strains a broke/cut  straight. i made another last night and lenghting my end so it would shorten the string, now i just have to see how long this one last.
Title: Re: flemish strings breaking
Post by: n8-mac on August 20, 2010, 11:02:00 AM
Jim, I am useing B-55 for my strings.  i have not been "backlaying" my strings. Am i doing something wrong? No broken strings yet.
Title: Re: flemish strings breaking
Post by: Jason Scott on August 20, 2010, 12:14:00 PM
What you want to avoid is cabling. I think that is what Jim is describing. It is when your individual bundles are twisted after tying the second loop. This can be detected while the two bundles are still runing parallel next to each other before twisting the string counter clockwise a little to string the bow. You should be able to insert your finger into each of the bundles (between the individual strands, not between the bundles) and run your finger down the length of the almost completed string. If you cant't then you have cabled that individual bundle during the twisting of your second loop. To avoid cabling(a bundle) you have to reverse twist the individual bundles the same amount of times that you will twist them when making the second loop.

I just backtwist the individual bundles after twisting the first loop, I don't back lay the bundles over each other. It serves the same funtion though. Then start twisting the second loop. After twisting the second loop you just tug the string from the loops firmly stretchin the string to ensure the bundles are carrying equal load. At this point you make sure there is no cabling and then add a little twist counter clockwise and string the bow. Heat the string with friction by rubbing a piece of leather up and down the string to seat the strands in the wax and serve the string. In short you don't want the individual strands of a bundle to be twisted, just the two untwisted bundles twisted around each other only. The only place the individual bundles are twisted is in the loops and an inch or so down the string from the bundles, then they straighten out like an endless loop string.