two legged end for end splice

Someone who has a corodano 15 and says their mainsheet (3/8) needs to be spliced to two 5' legs of smaller diameter (5/32) which attatch to outboard edge of the transom, in effect replacing the traveller. There is a drawing of this system at coronado15.org under "tuning tips" about 3/4 of the way down the scroll bar.
Does anyone know how to do this kind of splice, or heard of it? The only comparable thing I have done is strip the cover off a high tech line and then splice the core equivalent to the bare core creating two legs. Any thoughts appreciated, thanks,
Laurence

[Brian Duff]

I am not sure about the coronodo 15 , or what kind of line is being used, but I made similar sheets by bury-ing 1/4" double briad polyester into the 3/8" polyester double briad and stiching well, to make a two legged main sheet.
?

[Ian McColgin]

The description on the web site is puzzling. I drew it out per description and it amounts to double the pull of the line drawing at the home page - 4:1. Not 5:1. Perhaps I did not understand something. Given that two of the blocks are not at the boom end, the real power is less than 4:1 due to bad leverage. None the less, it's a small boat and I think the power is adequate.

The plan appears to be simply to ensure an amidships sheet lead at the transom. This makes very good sense as the original traveler idea seems a bit over-engineered. With this exception: If there are no class objections or if you just don't care, you might keep the traveler if you go to a high roach fully battened main. That sail will want to be pulled more to the lee transom corner. But otherwise, the class wisdom is sheet amidships.

Toward that end, 5' tails seems to me too long, but that can be subject to experiment.

Another very simple approach would be a loop that comes out of the transom on either side of and over the tiller. A simple becket bend of the mainsheet bitter end would be nice.

If the sheet is to be kept rigged most of the time - whether the boat is on a mooring or you trailer with the clew end of the boom still secured - you might make an eye splice in the sheet end of suitable length for attaching either side of the tiller (1' or so) or the gunnels (10') and just cut it in the middle.

I don't really see the value of using two smaller diameter bits. I think they recommend it as an easier way to manage to bury the two legs and they'd not thought of making an eye and cutting it at the apex.

One final alternative: If the hold-down over the upper pintel&gudgeon is at all adequate, you could do as many dories, tancooks, and such do by putting a strap or eye atop the rudder and belaying the sheet end right there. If you did that with a double block on the rudder head and a single with becket on the boom, you'd be all set to run the sheet up to a nice little cam cleat on the tiller, always ready at hand, and get rid of the clutter of the sheet in the middle of the cockpit, but that's another thought.

G'luck

Ian