… for the Max from your sailing!

Sails

Sails, masts and rigging, plus associated deck gear

The following failure has been reported by Maxi 1100 owner Peter Bruce.

 

Maxi 1100 owners might like to know that a crack has been found in the athwardships plate in the stem fabrication where it holds the forestay. The stem fabrication is not symmetrical and a stress point occurs at the weld where the athwartships plate intersects with the inboard fore and aft plate. Peter Bruce, who owns Owl, hull number 19 says the crack was well developed, and it might have led to the loss of the mast. It is just possible to view the weld in question with the forestay in position.

Peter Bruce has had the area heavily reinforced. This was done after removal of the stem fitting the the help of a good stainless steel welder.’
Quite by chance Peter Bruce has a spare (unmodified) stemhead fabrication should anyone need one.

 

UPDATE – Darryl has found the answer to the question below.

Download pdf file of the rig setup from Selden

Maxi Owners Association member Darrel Walters has provided the following phtographs and question. If you can help him please respond through our Forum. 

                                  38m_photo_1 

 

I own a 1999 maxi 38+ with an in mast main furling system, it is a Selden set up, double spreaders, swept back,
When I bought the boat in 2007 and launched it in 2008 one of the things the survey brought up was to have the rigging tensioned.
When I got the yacht back from southampton to Milford haven, I had the rig tensioned by our local rigger and as such I developed a leak in the lewmar hatch aft of the mast support.
Last year I was t boned by another yacht, where his anti foul was on by coach roof, there was damage to the rigging, and as such I decided to have it all replaced. At the same time I replaced all the hatches and discovered that the tension on the mast was slightly compressing the weaker coachroof part aft of the mast step. I got a surveyor involved, and suggested reducing the rake which was quite significant. We did this but soon realised that this also reduced the angle of incident with the swept back spreaders to support the top part of the mast. So we had to put the  rake back in the mast and monitor the coach roof of the mast step. I have to say that this has not increased or decreased.
The rigger says he is not prepared to put anymore rake in the mast. As it is now already 17 inches approx.
We are finding that  the mast is inverting above the top spreader now when we get winds above 20 knots approx. We can reduce the inversion by reducing the head sail. But the yacht does not feel over pressed. With a full set of sails at 20 knot. As the winds increase the bend increases.
The problem I have is the lack of experts in the area to say if this bend is ok or whether there is anything I can do to reduce it. The local rigger says he has tensioned the rig to the correct percentages and any more may cause un necessary stress.
Logic would say to increase tension on the back stay but doing so would reduce tension on the primary caps and quite possibly would make the mast fall off center
Every time i think of an option, creates a new problem.
Perhaps other maxi38 owners may have had the same problem or perhaps members may know a good rigger who is familiar with my rig and perhaps would not mind offering a bit of advise.
38m_photo_2  38m_photo_3

Choosing the ideal sails for the ideal cruiser/racer
HOW JOHN CHOSE HIS NEW SAILS FOR MAGEWIND, HIS MAXI 1050

With their combination of comfort, build quality, seaworthiness and performance, the Maxi range seem to me to offer a perfect compromise between the needs of a cruising family and my desire to get the very best performance from a boat, whether racing or passage-making.

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The original standard sails were made by Elvstrom, are cross cut and made of Dacron. A performance range were also available at an additional cost and are made from a Dacron and film laminate. Later Maxi’s are supplied with North Sails.

The original sails are a 105% Genoa and a 4 batten fully battened main sail. The Genoa has vertical battens to help support the leach. An optional spinnaker or cruising-shute is also available.

Apart from upgrading these sails with tri-radial cut sails made from laminates there is the option of adding a Code Zero, Flat Asymetric Spinnaker, a large roached 105-110%, 140% or 150% Genoa.

Some of the more recent boats, hull/sail number 43 onwards, have aft sheeting tracks or the facility for these built into the deck to allow for a 140% or a 150% Genoa. Boats prior to this do not have the deck-strengthening plates and retrofitting is much more difficult due to the need of removing interior woodwork and strengthening the deck from inside the saloon / heads. The initial boats fitted with the aft tracks had the tracks positioned for a 150% Genoa, later boats had the track moved forwards 18″ (450mm) for a 140% Genoa. Currently it seems that the tracks will only sheet the Genoa they were intended for.

The 140% and 150% Genoas would probable only be needed for racing or when large crew ballast is available. The 140% and 150% Genoas will increase your racing rating to somewhere in the region of 1018, this may well mean that the boat is un-competitive in stronger winds when using the 105% Genoa.

superted-cz-12The code zero is an additional headsail mounted on a separate furler attached forward of the main head-sail furler. An additional bracket needs to be fabricated to attach this to the stem-head fitting. The sail furls on a rope-luff and is hoisted using the spinnaker halyard. This furling system increases the cost of the sail considerably but the performance benefit for a Maxi 1100 in the right conditions can be quite considerable!

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