Line for preventer?

[Brion Toss]

Hi again,
You are likely fine; the bungy is just there to dampen things in use, as well as to keep the line snug when stowed. Remember, even a little snubbing action reduces shock loads tremendously. As for line size, by all means use what you have on hand; just know that the breaking strength for that 5/16" Spectra is probably at least 6 tons. Let's just say you have a generous safety factor.
As for the deck pieces, Sta-Set-X (we are having a special on that right now) or VPC would be better choices than Warpspeed, which is a bit too inelastic/spendy for the job.
Fair leads,
Brion Toss

[JohnV]

"Wonder if anybody else has thought of it..." was a try at humor, after I was so slow to figure out what the bungy did--Never mind.

My bigger question is: how much of a handicap would it be to use only one deck piece, turned around a block centered near the bow, say at the staysail tack? Given a cruiser, where speed is less critical, would the added trouble to unclip the deck line from the boom line, bring it around under the lifelines and outside the stays, and re-attach it on the new lee side--outweigh the added complexity and cost of twice the number of side-deck lines and turning blocks?
For that matter, might you make the same case for only one boom piece?

I couldn't find it in "Apprentice", btw. I assume I can stitch the bungy in place by putting a couple stitches through each of the spectra strands?
JV

[allene]

I use a bow cleat for the turning block. I want to add that I think it important that the line be long enough that you can release it at the cockpit and gybe letting the line free so follow the boom over to the other side, then attach the preventer on the other side after the gybe is complete. You could use two lines but you end up with a lot of line in the way of everyone for the lazy preventer.

[JohnV]

Sounds like we're on the same track, Allene.
My tentative plan is to run 50 or 60 feet of 5/16 staset-x from the cockpit through a series of fairleads that are already along the bulwark on one side. I'll double it back through a snatch block by the staysail tack when I'm using it, or else just leave the ends coiled and out of the way when I'm not.
I'll see how I like it with one spectra line on the boom end with the option to mount one on each side later.
John V

[jkfink]

Very interested in this approach. Please describe method: simply extruding core, inserting length of bungee into core, and having cover swallow core/bungee? How much bungee ? Thank you.