12-strand to double braid splice

[mrgnstrn]

Where would I find info on how to splice a high-tech 12-strand to a double braid?

Application is spinnaker halyard on a 35' masthead rig.

I don't like the idea of buying 100' of high tech line, when only ~50' of it will be loaded and actually need to be high-tech. The rest is just there lying on the cockpit floor.

Cartoon of the splice I would like to do is here:
http://www.apsltd.com/c-1539-splicin...heetsguys.aspx
(scroll down to the one labeled "core-to-core bulk splice")

Are the rudiments to do this in Riggers Apprentice?
Is it shown explicitly in "Working Rope"?

Thanks,

M

[Brion Toss]

Hello,
Alas, I don't have this type of splice in print or on video yet, though we have destruction-tested several variations. The principle for my favorite one is the same as a locked grommet, as seen in Book 5.
Fair leads,
Brion Toss

[mrgnstrn]

Originally Posted by Brion Toss

Hello,
Alas, I don't have this type of splice in print or on video yet, though we have destruction-tested several variations. The principle for my favorite one is the same as a locked grommet, as seen in Book 5.
Fair leads,
Brion Toss

OK, so a brummel splice on the core-to-12strand part...got that mentally.

What about the cover and 12-strand?
Just bury the cover for looks, or do a brummel on that as well?

My intuition is that since the cover and core in the double braid section will be (should be?) sharing the load before the halyard is hauled all the way up, there should be a fairly structural splice between the cover and the 12-strand, like a brummel or a long tapered bury. Instances where the double braid would be loaded may be: while hauling a sail to the top before the 12-strand is at the winch/clutch, and when using it to haul a person to the top of the rig. right?

-M

[jeffh]

Hi Brion and M,
I've held off in posting on this topic for the spring/summer as I wanted to test the HM Core to "Standard" Double braid core (Stay Set in most cases) splices I'd made, under working (around the buoys and distance racing) conditions.

Using Brion's "locked" brumell and 72 diameter tapered bury method (as described in Book 5 employed in making a HM grommet) although in my splices one core is not HM rather a Standard double braid core.

I started out with employing these splices in easy to moniter applications, light weight spinnaker sheets/guys, then heavy weight (ie full load) spinnsheets, graduating to jib/genoa sheets (lightweight and full load) and finally to halyards. First working jib, thence genoa and finally spinnaker (both asym and symmetrical).

These halyards were on both fracrtional and masthead rigs from a Sonar up to a J-44 and I can report the following:

Outside of some incidental chafe in various sheave box areas (the usual wire sheaves don't handle 12 strand or any braid,covered or uncovered, all that well unless its' ((the braid)) is quite a bit undersized issue.). All splices/lines held up well in their applications.

The chafe issues can be addressed in a variety of ways which have been discussed elsewhere in this forum.

To answer M's last question once the locked brummel/taper and buried "core tail splice" is completed the cover/core issue then becomes a matter of the common "stripped cover" procedure. Extract core (after stabilizing/securing cover to core) bury cover taper and smooth. Lock stitch as crossover and whip crossover in the standard matter. Marlow, Samson and NE Ropes all have illustrated instructions in the procedure.

For Brion's reference, I did find that prior to marrying the two cores together it was/is necessary to extract approximately 12-14" extra of standard braid core and discard the same. This was to ensure that there was this amount of "extra" cover left after the splicing of the two cores to effect the stripped cover bury into the HM core procedure.

The size of lines used were 3/16" Amsteel, V-100 and Endura 12 to 5/16" Sta-Set and Samson xls. Likewise 1/4" HM to 3/8" Double Braids. and 5/16" HM to 7/16" Double Braids.

I also found that upon completion of the HM unlaying and rebraiding/or creating of the 4 braid round sennit in creation of the locked brummel I only had to taper 6 strands (or half of the 12) rather than 8 as per instructed in creating the grommet. There was no problem at all with bringing the cover back "down" (over the locked, tapered and buried HM core) with this procedure. I attribute this to the cover I employed in all the splices was 12 strand (pretty much the standard for double braids except Marlow and the "blended core double braids like XL extra and VPC) and not 24 strand which is tighter, and the common cover for HM cored lines.

For M's reference, you will have to make your own determination of measurements, but the locked brumell method holds the two cores together well, as I cut a few open after some heavy loading (both static and shock) and no creep/distortion was detected. With the two cores being "locked" together employing Brions method, hoisting (sail or person) aloft with the standard double braid being the laboring oar should be of no concern, allowing that the diameter/Breaking strain of the standard double braid core is up to the task.

Hope this helps
jeff