Rigs & Rigging

For dialogue relating to rigs and rigging, read on.

In order to submit a new question, click on “Cruisers Q&A” in the sidebar, whereupon you’ll find a form you can use.

Wharram style “soft wing sail” viability on a monohull

Hi Steve,

I am designing a rig for a 42′ cruiser (monohull). Due to the nature of the hull I need a lot of sail area and a low center of effort. James Wharram, about 20 years ago, developed what he calls a “soft wing sail”. It is a gaff rig with the leading 1/4 of the sail made up as a sock which slides over the mast, in place of hoops, lacing, etc.
It’s obviously efficient aerodynamically.

My concern is that friction between the sail and mast could cause problems with reefing/dropping the sail. Wharram has been using the design now for decades and says that there is no problem, that it can be dropped on any point of sail. He has lots of boats sailing with this rig.

It seems to me that if this works on a cat it should work on a mono as well. I’ve crunched the numbers on rigging loads and mast compression and these can be made to work.

I’d greatly appreciate your thoughts any any experience you have to share on how this rig might work on a mono.

Regards, Paul

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Posted by Steve Dashew  (June 23, 2009)    |    Comments (2)

Furling Line Control

Can a ratchet block be used in order to control the release of a furling line? The 44′ boat I recently purchased uses a small diameter spectra line for furling, and if and when it takes off in a breeze, it can do great damage to the hands! If you let it go, it usually kinks in the aft furling block. Thanks, Ted

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Posted by Steve Dashew  (November 30, 1999)    |    Comments (0)

Rod Rigging Fatigue

Hello Steve, I have a decision to make now on my new rig.

I have a brand new carbon fibre spar. It is 56′ long, double spreaders with discontinuous rod standing rigging.

The shrouds terminate with stemballs in the spreader bars (i.e. no tangs in the spar except for the cap shrouds).

The shroud stemballs cannot be removed while the spreaders are in place, which means that if I had a shroud problem, it would be impossible to change while the mast is standing.

Navtec has a part which is a stemball with a marine eye on the other end. This means I could have forks on the ends of the shrouds, which are pinned to the stemball eyes, which are embedded in the spreader bars. This would allow me to change a broken shroud while under way.

My question is: Should I bother? With rod rigging, are there signs of fatigue, like with meat hooks etc. in wire? If I broke a shroud, say a D3 or V2 or D2, or something, would the spar already be broken and changing the shroud is now meaningless? Obviously if a V1 broke, the mast would snap instantly, so we don’t have to talk about that. More clearly stated: is there any circumstance that would prompt me to want to replace a rod shroud while away from a harbour and a mast crane?

The stemball eyes would likely add maybe 2 or three pounds to the rig, and add the complexity of a dozen extra bits and pieces.

I want to sail across an ocean (and back) some time in the next few years or so. – Ryan

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Posted by Steve Dashew  (November 30, 1999)    |    Comments (2)

Leaks via Mast

Hi Steve, Good articles on leaks…

I’ve never had mast collar leaks…but what I do have is rain water getting into the mast, I guess through the halyard exits etc., which accumulates in the bilge…any suggestions as to how to cure that kind of leak?? Cheers, Alan

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Posted by Steve Dashew  (November 30, 1999)    |    Comments (4)

Roller Reefing #4?

Hi Steve, I’m ordering a #4 for my J120 which I intend to sail from the Caribbean back to the States this spring. The boat is set up for roller furling on the headstay.

My question: Does it make any sense to put reinforcement in the #4 so it can be rolled up to storm jib size? I do have a storm jib, but think it would be easier to set the trysail and the #4 when the wind gets over 25 knots, and progressively roll up the #4 as the wind builds. Easier — but impractical?

I’d be most interested in your comments. Love your books (I’ve got ‘em all). Cheers, David

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Posted by Steve Dashew  (November 30, 1999)    |    Comments (0)

Slab Reefing

Hi, I’ve just purchased a 1975 Westerly Centaur (and yes, I don’t plan on getting anywhere quickly). The boat has its original rigging including a roller-reefing boom. I would like to employ some sort of basic slab reefing type approach, but there are no reef hooks and there doesn’t appear to be an blocks on the stern end of the boom for running lines to the clew of each reef. Can I just mount all of this on the present boom and run appropriate lines? If I can mount such hardware, would I rivet it onto the boom? Or do I need to think about a new boom (I really don’t want to buy a new boom). Thanks! – Arthur

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Posted by Steve Dashew  (November 30, 1999)    |    Comments (0)

Single Line Reefing

Dear Steve, We are building a 46ft cat for live-aboard offshore cruising and have been studying and contemplating your writings with relish…We are ready for rig quotes and have been considering single line reefing – mostly to reduce the number of lines in the cockpit. Our last cat had simple slab reefing with luff & leach lines returning to the cockpit, and it worked very well.

We are concerned about adding complications and are unsure how to do it so, & that if anything goes wrong inside the boom we can fix it easily. Most people we have asked have thought it was OK in smaller boats, but weren’t confident to recommend it for as powerful a rig as ours.

Our cat is ‘a mainsail boat’ with 75sqm main with big roach like Beowulf, and self-tacking jib.

I am wondering if you could tell us how you set up single-line reefing in Beowulf and whether you have any more information or impressions that would help us.

Best wishes with your new project. – Sandy S

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Posted by Steve Dashew  (November 30, 1999)    |    Comments (0)

Fractional Rigs for Cruising

Dear Steve, Thank you for taking the time to read our email. We are selling our home to buy a yacht to cruise the oceans to enjoy our time together. I’m a marine mechanic specializing in power boat refits. I have limited sailing experience and Karen has even less.

We are currently shopping for a yacht with the intentions of learning on the boat we will be cruising on. We have your books and recently purchased a video you appear in (Heavy Weather Sailing), we found it all very exciting and informative. We are planning on spending the next year or three learning and doing all the necessary courses to become competent offshore sailors.
The yachts we are looking at are mainly masthead rigs but we have come across a fractional (Farr 1104) which shows a lot of potential as a cruiser/live-on.

Although you suggest water length to be main consideration, this is the largest within our price range. I am aware of the sailing differences between fractional and masthead after reading your books, but I have no experience sailing on fractional rigs and am not sure of the difference of rig strength.

The type of yachts we are looking at are:

Duncanson 35′ Masthead
Northshore 33′ Masthead
Farr 36′ Fractional

Just once again thank you for your time and valued advice. – Alen S

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Posted by Steve Dashew  (November 30, 1999)    |    Comments (0)

Using a Roller Furling Headsail Upwind

Hello, In your rigs and rigging section, you mention using the Profurl 4000 free flying furler. Can that furler be set tight enough to work for use up wind sail?

Don Street, in his valuable book The Ocean Sailing Yacht, mentions his using a similar unit some years ago for both jib and staysail and using them upwind, downwind, whatever. High luff tension is vital, of course. I don’t see why these couldn’t be used for all headsails, providing the safety of being able to get the sail down and also being able to easily change sails. Leaving the headstay would provide the backup system for a hanked-on sail. The century-old Wykeham-Martin design still works well for gaff riggers. Can the new flying furlers fill the role for Bermudan rigs?

Thanks, Donal

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Posted by Steve Dashew  (November 30, 1999)    |    Comments (0)

Halyard Brake for Use with a Furling Boom

I am installing a small electric anchor winch to hoist and reef my boom furling main, which has a large roach. I would like to have a halyard brake or other device to maintain light, constant tension on the halyard as I haul the sail down to reef or stow completely. If tension varies, the roll loosens and risks jamming against the front of the boom. Who makes such devices, or can one find a rope clutch that has a variable setting that could be used? I don’t care what it is called, only that it does the job I require…Thanks….Lowell

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Posted by Steve Dashew  (November 30, 1999)    |    Comments (0)

Swept Back Spreaders and Baby Stays

Dear Steve, We have been following your commentary for years now and have a question that we hope you can help with.

Do you feel that a baby stay on the ketch rigged Sundeer 64’s would aid in preventing a mast inversion due to operator error? What conditions would create a circumstance where you could lose the spar?

I am referring to page 662 of Offshore Cruising Encyclopedia, regarding your discussion of swept back spreaders. Is this setup less forgiving than a conventional spreader configuration with forward shrouds?

Any comment would be appreciated. Thanks, Wayne

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Posted by Steve Dashew  (November 30, 1999)    |    Comments (0)

Controlling the Furling Line

Can a ratchet block be used in order to control the release of a furling line?

The 44′ boat I recently purchased uses a small diameter spectra line for furling, and if and when it takes off in a breeze, it can do great damage to the hands! If you let it go, it usually kinks in the aft furling block. Thanks, Ted

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Posted by Steve Dashew  (November 30, 1999)    |    Comments (0)

Stoboom Parts

We have a Stoboom on our Bristol sloop and I would like to keep and maintain it for some time to come. When we bought the boat several years ago, the sage wisdom from the people we spoke with was to ditch the Stoboom and go back to a conventional boom/sail rig.

We have got used to using the Stoboom and really would like to keep it in good shape. Any idea where we might find a source of parts for it? We have been unable to find anything on the Internet or by contacting Hood. Also concerned about eventual deterioration of the sail track over time. Thanks. – Roger

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Posted by Steve Dashew  (November 30, 1999)    |    Comments (0)

Rope to Winch Angle

Dear Mr. Dashew: A few years ago, I bought your book Offshore Cruising Encyclopedia and found it most informative. For the past 3 years I have been building a Baltek Superlite balsa/epoxy 50′ Simonis-designed catamaran here in Johannesburg, South Africa. We have never sailed or owned a boat before, and every day we find new challenges and unique problems that we have to overcome. We are building this boat 600 kilometers from the nearest port with no experienced folk anywhere in sight. Despite these handicaps, so far I think we have managed pretty good, and day by day we are getting closer to our dream. We are now close to finishing the hull, deck and bulkheads. After this we will then commence with the deck hardware and internal fitting.

The purpose of my email: I cannot find any readily available information either in your book or elsewhere on the Internet providing details regarding the rope to winch (Lewmar – self tailing) angle. I am referring to the genoa rope – at what angle to the winch drum should this rope connect? I would imagine that the rope should meet the drum at about 90 degrees – but I am not sure.

You must be extremely busy but your advice will be greatly appreciated. Regards, Wiets W

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Posted by Steve Dashew  (November 30, 1999)    |    Comments (0)

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