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Main Boards => PowWow => Topic started by: Gottabow on February 01, 2010, 04:36:00 PM

Title: D 75 Thin for strings?
Post by: Gottabow on February 01, 2010, 04:36:00 PM
Anyone know anything about this material and if it makes a good string?  Thanks
Title: Re: D 75 Thin for strings?
Post by: Rob DiStefano on February 01, 2010, 04:55:00 PM
i dunno the spex on d75 but i personally wouldn't use any fiber with a strand tensile strength of much less than 100#.
Title: Re: D 75 Thin for strings?
Post by: SHOOTO8S on February 01, 2010, 05:02:00 PM
D-75 IS 100% Dyneema...seems to have a bit more creep than D-97 but much the same material.
Title: Re: D 75 Thin for strings?
Post by: Gottabow on February 01, 2010, 05:15:00 PM
So is D97 the standard now?  I also like TS-1..is there a difference there also?
Title: Re: D 75 Thin for strings?
Post by: Chris Wilson on February 01, 2010, 05:26:00 PM
QuoteOriginally posted by Rob DiStefano:
i dunno the spex on d75 but i personally wouldn't use any fiber with a strand tensile strength of much less than 100#.
Soooo, you wouldn't use the tried and true B50 Dacron?  Interesting.
Title: Re: D 75 Thin for strings?
Post by: Rob DiStefano on February 01, 2010, 05:37:00 PM
QuoteOriginally posted by Chris Wilson:
 
QuoteOriginally posted by Rob DiStefano:
i dunno the spex on d75 but i personally wouldn't use any fiber with a strand tensile strength of much less than 100#.
Soooo, you wouldn't use the tried and true B50 Dacron?  Interesting. [/b]
use dacron for my bowstrings?  no way.  hmpe dyneema is SO much better in every way (well, except cost).  

at around 100#/strand, that gives me the ability to use less strands for a lighter, faster, quieter bowstring.  with my bow, the differences 'tween 14 and 8 strands are very noticeable.     :thumbsup:
Title: Re: D 75 Thin for strings?
Post by: Chris Wilson on February 01, 2010, 05:47:00 PM
QuoteOriginally posted by Rob DiStefano:
 
QuoteOriginally posted by Chris Wilson:
   
QuoteOriginally posted by Rob DiStefano:
i dunno the spex on d75 but i personally wouldn't use any fiber with a strand tensile strength of much less than 100#.
Soooo, you wouldn't use the tried and true B50 Dacron?  Interesting. [/b]
use dacron for my bowstrings?  no way.  hmpe dyneema is SO much better in every way (well, except cost).  

at around 100#/strand, that gives me the ability to use less strands for a lighter, faster, quieter bowstring.  with my bow, the differences 'tween 14 and 8 strands are very noticeable.      :thumbsup:  [/b]
I agree, the newer low stretch materials are much better in overall durability.  I don't use dacron unless the bow calls for it.  I just never heard anyone make that kind of statement concerning string material and tensil strength.  Just probing a little deeper.   :biglaugh:
Title: Re: D 75 Thin for strings?
Post by: Rob DiStefano on February 01, 2010, 06:12:00 PM
at around 100#/strand, a 14 strand dyneema string has about 1400# tensile strength.  way overkill, for a 55# bow but extremely stretch free.  drop that down to 8 strands and 800# tensile strength and i'm still above my usual 12x the bow's holding weight per string tensile strength formula.

50# bow x 12 = 600# tensile strength minimum.

therefore, 12 strands of 50# dacron, or 6 strands of 100# dyneema - both equate to 600# of tensile strength.  df'97 dyneema and b50 dacron are about the same diameter and weight, so which will be the lighter, faster and quieter bowstring?  :)
Title: Re: D 75 Thin for strings?
Post by: Arwin on February 01, 2010, 06:17:00 PM
Never heard of it but sounds cool.    :thumbsup:  If it's anything like D-97 you only have everything to gain.   ;)