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GaryL

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Reply with quote  #1 
Hello,

I want to build a 12 strand D97 Flemish String for a new 55# Primal Styk I just bought. (totally love this bow by the way) 

I have never made padded loops before and I have a couple of questions.

1 - How long should I make the pads?  I usually start my twist at about 8" from each end.

2 - Where do I lay the padding?  Do I match it up with the end of the string or move it up 2 inches or so?  Is there a formula as too where to place the padding before you start your twisting?

Thanks in advance for any help or advice.

Also, if you think that padding a 12 string D97 is unnecessary I am also open to your opinions.  My limbs tips have horn overlay's but I just want to make sure I am protected and it doesn't seem that padding will hurt, maybe just a little insurance?

I have really only made B50 strings in the past on my ASL's but on this bow I feel like a FF string is probably justified.

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HH Redman 66" 58# @27"
HH Cheetah 70" 60# @28"
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HH Limited Edition Rocky Mountain Bighorn Sheep 66" 60# @26"
Long River 66" 65" @28
Bear Montana 64" 55# @28"
John Strunk Ocean Spray Spirit Stick 35# @27
John Strunk Traditional Spirit 65# @26"
John Strunk Mollegabet, Yew/Bamboo Backed 45# @27
Yew Self Bow, 53# @28" (Made with John Strunk)
Pacific Ghost Osage Longbow 76# @29"
Browning Wasp 45#
73' Bear Kodiak Hunter 60" 50# @28"
Damon Howatt Cabelas Edition, 55# @28, AMO 60"


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Rocky

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Reply with quote  #2 
I usually pad the loops to 16 strands on a fast flite compatible bows. With and 8 inch tag end I would cut the pad strings 12 inches long and place them about 3/4 to 1 inch from the tag ends. That should blend in quite well. 
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Old Sailor

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Reply with quote  #3 
I am not familiar with D97 but for my Ultra Cam strings I always pad to 18 or 20 strands. For a 3 bundle 9 strand string I pad each bundle with 3 padding strands of staggered lengths, 12 , 10, & 8”. I start them an inch or so from the end of the string trying to center the padding on the loop.
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JD Berry Morning Star 54#@28, Northern Mist Classic 54#@28Sovereign Ballistik 60#28, Howatt Hunter 55#@28, Ben Pearson Mustang 46#@28

"But God demonstrates His own love towards us, in that while we were still sinners, Christ died for us."  Romans 5:8

"The problem is not guns, It's hearts without God, Homes without discipline, Schools without prayer, and Courtrooms without justice" ; unknown.

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thumper

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Reply with quote  #4 
Watch this: 
chuckc

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Reply with quote  #5 
To me....this series is absolutely the most informative for my taste. Well worth the investment in time.
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I did too !

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bob4st

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Reply with quote  #6 
I agree with you chuckc, it's a nice vid series... I always got the change in twist directions confused.. Eventually solved that problem by buying a few extra strings to go with each bow.. I must admit that making your own is fun once you gain a little confidence..
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JR Belk

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Reply with quote  #7 
Padding a 12 strand D97 is unecessary. It'll already be overbuilt for that bow.
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Old Sailor

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Reply with quote  #8 
Padding doesn’t increase the strength of the string. It only fills out the nock groove to spread the stress over a larger area.
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JD Berry Morning Star 54#@28, Northern Mist Classic 54#@28Sovereign Ballistik 60#28, Howatt Hunter 55#@28, Ben Pearson Mustang 46#@28

"But God demonstrates His own love towards us, in that while we were still sinners, Christ died for us."  Romans 5:8

"The problem is not guns, It's hearts without God, Homes without discipline, Schools without prayer, and Courtrooms without justice" ; unknown.

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James Calamaris

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Reply with quote  #9 
Chuck, his presentation was great ! Basically, the way I have been doing it for years.
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JR Belk

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Reply with quote  #10 
Quote:
Originally Posted by Old Sailor
Padding doesn’t increase the strength of the string. It only fills out the nock groove to spread the stress over a larger area.

I'm aware of that, but the diameter of a 12 strand D97 string is more than sufficient.

I was saying that many strands in that weight bow is already overkill along with the loops being big enough.

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JR Belk

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Reply with quote  #11 
You guys also need to remember that "spreading the stress out" isn't the only variable.

Reduce the stress in general. You should reduce strand count in your strings and allow them to stretch on the shot. Stretch and creep are two different things, by the way. A string has to be able to give. That's why most when first going to Ff materials hate them. It's always an overbuilt string. After properly being made and correct serving size, there's not a "skinny string feeling" like some complain of. Your nock has to fit, so it ends up being the same size at your fingers regardless of strand counts.
Look at these numbers. A proper dacron (B55/B50) string needs to be about 1 strand per 5 pounds of bow weight, so a 45# bow could run a 9-10 strand safely with no issues. We'll go with 12 strands which is what I run average for 45# or so on most.
Given the average strand breaking strength of dacron materials a 12 strand B55 can withstand about 660# of force.

A D97 of the SAME FINISHED DIAMETER ends up about 14 strands, but we'll stick with 12 strands as a rule of thumb. D97 has a breaking strength hovering around 110# per strand. So, basically doubles dacron, but a true reading of 1,320#

In other words, no give on a bow. Which results in a harsh feeling because you're just slamming the limb tips. I run a 9 strand D97 string on 64# bows, but it's good much higher weight than that. Loops are padded to 12.

I use a 12 strand 8125 string on the same bows padded to 15 in the loops. 8125 and D97 are the same material, but 8125 is a smaller strand and slightly lower breaking strength.

Make sure your strings are built for the bow, not just for diameter. Your bow and your shooting will thank you.

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Reply with quote  #12 
JR. 

   Thanks for the suggestion about overbuilt strings !!  I was never a huge fan of FF but have been messing around with it lately.  Never considered my old recipe as overbuilt but I followed your suggestions, WOW..string feels much better on the shot and pretty quiet also.  I dropped to a 10 strand string of D97 padded to 16 in the loops and it made a significant difference!! Thanks for the tip.

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Reply with quote  #13 
You're welcome.
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