Thats what I meant by 'nominal'. I was told the 1/8" 1x19 has a larger
diameter than a 1/8" compacted wire. Let me google it. ...
oops, looks like I'm wrong based on:
http://www.rigshop.com/site_pages/products/standing_rigging/wire.html
Just a couple datapoints, ... don't use this for your decision.
says 4mm compacted is ~same strength, 16% smaller diameter and 10%
stretchier than 3/16 1x19 .
says 4mm compacted is ~same diameter, 30% stronger and 24% lower stretch
than 5/32 1x19
why the stretch and strength differences are not the same doesn't make
sense to me...
On 3/21/2016 10:59 AM, Michael Kennedy wrote:
> Won't the same diameter have the same wind resistance???
>>> ------------------------------------------------------------------------
> *From:* Michael Sporer <pasta514 at hotmail.com>
> *To:* tuna at myfleet.org> *Sent:* Monday, March 21, 2016 9:19 AM
> *Subject:* Re: [Santana 22] Replacement Tuna rigging - Dyform or
> compacted wire, anyone?
>> I was under the impression that for a given nominal wire size the
> compacted version had the same cross-section area of steel, same
> strength, same weight and same stiffness, but had lower wind
> resistance. That way in a pinch you can swap between the two types
> without worrying about any differences in the really important parameters.
>>>> On 3/20/2016 11:02 PM, Jan Grygier wrote:
> Fellow Tuners,
> In a nasty blast a few weeks ago on the Bay, Carlos' mast suddenly
> went sideways, outers parted at the top and inner at the bottom.
> Amazingly mast is fine (and so are all the crew). So I need to
> replace Carlos' standing rigging, and someone suggested Dyform or
> "compacted strand" wire. They are both SS wire but pack a bit more
> steel into the same diameter (I think) and are therefore somewhat
> stronger and less stretchy.
>> Does anyone have experience with either of these - or know whether
> they are legal, for that matter? For reference, this is what I see in
> the current rules (first entry is in main body, second entry is in
> checklist):
>> 14.Wire rigging shall be of the same dimensions and materials as
> supplied by factory except as to lower shrouds.Turnbuckles must be not
> less than factory specifications as to dimensions and materials.No rod
> rigging is permitted.It is suggested that boats sailing in heavy air
> replace the factory supplied 5/32” lower shrouds with 3/16” wire.
> B.Standing Rigging
> 1.All rigging is 5/32” SS wire. Lower shrouds 3/16” max. No rod rigging
>>> Thanks much,
> Jan Grygier
> Carlos, Hull 320/sail 5020
>>> ------------------------------------------------------------------------
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