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Thread: HMPE Strings

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    In the Gold dvd8n's Avatar
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    HMPE Strings

    I was talking to Sid at Border Bows today. He asked me what string material I used; I told him that I used Angel.

    He sucked his teeth and told me that I should just use Fastflight+.

    I was on the point of ordering some Brownell Fastflight+ when I looked at what it was. As far as I can see Fastflight+ is 100% HMPE, as is Angel. What am I missing here? Is there more to the chemistry than just the chemical formula? Is it down to chain length or something?
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  2. #2
    It's an X I've taken part in an AIUK Ironman Shoot.The Fonz Award.AIUK subscriber. Timid Toad's Avatar
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    Sid Senior? I'm going to check that out... bear with me...
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    In the Gold dvd8n's Avatar
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    I'm not arguing with Sid, by the way, I'm genuinely baffled by string material and I have to admit that I'm making pretty much arbitrary decisions about it.

    I probably will buy some Fastflight+ because I'm sure that Sid knows his stuff, I'm just trying to understand.
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    It's an X I've taken part in an AIUK Ironman Shoot.The Fonz Award.AIUK subscriber. Timid Toad's Avatar
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    Ok, string materials are baffling, with various manufacturers giving the same stuff proprietary names but not explaining properly what's the actual material involved.

    So here goes:

    If you are in any doubt, Fastflight+ is a safe bet, particularly if you are buying a string off the shelf. This is what Sid was saying.

    However, HMPE is fine. Angel's current lineup is fine, as long as you take into account the varying thicknesses of the strands. 777 is thicker than Majesty Pro for example.
    Avoid at all costs any string with the word X in the name. These were originally designed as ultra low stretch for compounds, and recurves need a little stretch. I know Border don't recommend them, and Uukha and (I believe) Hoyt and W+W recommend other materials too. Statistically there seems to be more limb failures with X fibre strings. At the moment that's anecdotal, but I'd not want to risk my 700 limbs for a 15 string and a couple of extra fps.

    What I do is get my strings made a tiny bit longer than normal and add in perhaps 10 or so extra twists. It gives a lovely very rounded string, with a tiny bit more give than one with fewer twists. The other alternative is to reduce the strands count by a couple - it'll give a little more speed - but if that makes the bow noisy, which it might, I'd prefer the more twists option.

    I've been shooting various incarnations of Angel for over 10 years with the approval of Border and have never had a problem. Hope that helps.
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    It's an X AIUK subscriber. Rik's Avatar
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    There are a few different formulations of Dyneema and Spectra (the main versions of hmpe for bowstrings) but the differences between them appear to be tiny. Marketing points rather than detectable in real world archery applications.
    Ever tried? Ever failed?
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    In the Blue
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    Most of the top Korean archers still use FF+ strings on their recurves, I made FF+ and 8125G strings or my Recurve (Smartriser, Uukha X-curve) both set to the same brace height, and shot them over my chrono. Result, both clocked the same speed. The Koreans say that FF+ is more forgiving on a poor release, mind you their poor release is my good one.

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