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Old 01-09-2010, 22:44   #1
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Square-Rigging System for Sail Boat - Info, Please

I know there is a kit for sail boat for going down wind in the atlantic crossing for sail boat. I need info, enibody knows about it ??
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Gianni
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Old 01-09-2010, 22:57   #2
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I think what you need is a spinnaker or a kite.

KiteShip - Pleasure Marine
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Old 02-09-2010, 03:54   #3
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Sorry i mean ONLY SQUARE SAIL, i have meet a sail boat 1 year ego, it was a normal sloop. Very easy solution for down wind.

Please replay if you have this info.
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Old 02-09-2010, 05:00   #4
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Suggest you have a search on here for "twizzle rig" and Swagmans posts, Very informative. Not sure if I was short handed I would want to fly that kite thing. The twizzle rig can easily be reefed too.

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Old 02-09-2010, 07:39   #5
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No, there's isn't a kit for 100+ year out of date technology. The square sail isn't a reasonable option on a modern sailboat. It is on certain types of gaffers, but these boats would be much better off employing a different down wind strategy, such as twin headsails or other down wind specific considerations.

So, it depends a great deal on your yacht Filaviasail, as to what you can safely carry aloft. What are you looking to apply this to?
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Old 02-09-2010, 08:48   #6
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A system to carry square rig was designed by L Frances Herreshoff many years ago. The yard was hoisted aloft and could set a course and a raffee.
I sailed on one of his Marco Polos with this rig, it worked very well.
It is illustrated in his book "Sensible Cruising Designs"
Don
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Old 02-09-2010, 09:22   #7
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I built a square sail fofr my gaff rigged schooner years ago, and as PAR pointed out, for a gaff rig it is an old, but good system. It looks like you have a large marconi rigged catamaran, filaviasail, and I would not want to try to put a square on that rig. Marconi masts are no designed for that kind of stress and chafe. One of the triangular down wind rigs would be better, I think.
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Old 02-09-2010, 12:28   #8
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Marlinspike states it simply. There is a design and it was applied to a boat that was designed to use it.
I too have set a square sail on a Marco Polo which was a three masted marconi schooner. Not an easy task but doable.
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Old 02-09-2010, 13:09   #9
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In the late '80's a fellow by the name of Denny Moore and his wife, of Moorehaven, Florida, sailed around the world on an old Concordia yawl named "Prospector". He rigged the boat with a yard fitted with an underslung roller-furling assembly, similar to an in-boom furling system. He could hoist the yard, suspended at it's mid-point, up to his lower spreaders on a jack-stay and unfurl and brace his "square sail". He was even able to hoist a Raffee from that to his top-mast. While the rig looked cumbersome, it evidently worked well enough to drag him around the world. (Google "Gentmen Never Sail to Weather") I suspect one could do something similar with a furling boom if one wanted to endure the brain damage.

FWIW...
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Old 02-09-2010, 19:11   #10
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We met a Canadian boat with normal rig plus a square sail on the fore mast. I think it worked very well for them.

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Old 02-09-2010, 21:44   #11
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Weight aloft and chafe are two things to consider. If your spar were light alloy and you rigged it well for chafe then I guess you could make it work.
I don't know of any kit available.
regards,
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Old 04-09-2010, 19:35   #12
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Maybe the spar could be had in carbon? Lighter = less chafe?

b.
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Old 04-09-2010, 20:39   #13
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I think the highest you could hoist the yard would be to the lower stays. That is, to the lower spreader since the stay tangs are there. The stays would transfer the load of the square sail down to hull through the chain plates. If the yard were raised higher it would produce an excentric load causing the mast to bow forward...until it failed. The main problem I see is bracing the yard. The spreaders extend to near the full beam of the boat. As the yard is braced it will fetch up against the upper stay as it passes the spreader. So, you would only be able to brace the yard one or two degrees aft. A cruising spinnaker is a more workable solution.
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Old 04-09-2010, 20:57   #14
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If the boat was something like a topsail schooner, then yes it could work, but usually entailed using a bare yard, which doubled as a spare boom or gaff, and topsail yard. The rig and vessel would normally be designed to accept the differing stresses. On the other hand, this is an antiquated sort of rig one does not see anymore except on vessels, or replicas there of, dating back a hundred years or more. With today's boats, rigs, and sails there is little reason to adopt a rig of that sort as genoas and spinnakers are more efficient, and indeed, modifying a modern sailing rig to that configuration might induce unacceptable stresses and greatly complicate handling.
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Old 04-09-2010, 21:35   #15
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In Self-Steering without a Windvane by Lee Woas, he mentions that Tom Steele used a 20 foot yard squaresail on his 32' ketch Adios which had a 10' beam. Apparently, it worked for self-steering (like twins) but with some other advantages (easy to make, low cost, easy to reef, simple fittings, useful on other points of sail [minus self-steering]).

As a side note, there seems to be a strange myth circulating in the sailing world that technology that worked for thousands of years suddenly doesn't work. That said, it may or may not be appropriate for your rig. I think I may have some other data on it in my other self-steering book, but that's on the boat....
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