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SCREWING THE BRONZE PLATE

The bronze plate is there to protect the boat when beach landing and act as ballast to give stability.

Phosphor bronze has excellent wear resistance and corrosion resistance. Their spring qualities are also fatigue resistance very good.

I believe in belt and suspenders so in addition to gluing I have screwed the plates with silicon bronze screws. I do not like to use stainless steel below the waterline.

Silicon bronze is just a bit nobler than phosphor bronze and that is as it should be because their surface is smaller.

The scarifying metal will be the phosphor bronze.

Below, part of the galvanic series:

Graphite

Palladium

Platinum

Gold

Silver

Titanium

Stainless steel 316 (passive)

Stainless Steel 304 (passive)

Silicon bronze

Stainless Steel 316 (active)

Monel 400

Phosphor bronze

Admiralty brass

Cupronickel

Molybdenum

Red brass

Brass plating

Yellow brass

Naval brass 464

The screws are set in NM-epoxy. When drilling the holes I pendeled the the drill creating a conical hollow in the Divinycell below the plate and glassfibre into that hollow i injected epoxy.

To be continued…

Regards Yrvind.

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GLUING PHOSPHOR BRONZE

To protect Ex Lex bottom and increase her stability I am adding two 4 mm thick phosphor bronze plates. Together they are 2 meter by 0,6. The high cupper content makes them antifouling.

Thomas and me checking if they can take the bottom curve.

Petter is helping to glue them.

The bronze surface is prepared by wetsanding it in NM-epoxy to make sure no oxygen will oxidise the surface.

In addition to gluing they will when the glue have set be scruwed.

To be continued…

Regards Yrvind

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HAPPY LAMINATORS

The outside of Yrvind Ex Lex hull is now succesfully laminated. She got twelve layers of 450 gram glassfiber in the bottom for beachlanding in NM 275 epoxy.

The hullsides got 2 layers. The last layer is peelply.

From left to right Jonas, Thomas, Matthias, Oskar, Maya, me i the foreground. Petter and Jerker are hiding.

To be continued…

Regards Yrvind.

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LET ME EXPLAIN

Some people still do not understand how misleading it is to measure boats of different shapes by length. Let me explain. Physical objects, besides weight and inertia extend in three dimensions.

My anchor rode is 50 meter long, but I can coil it and put it in a locker in my boat so surely it is not bigger than my boat.

A scull weighs typically 14 kg and is around 8.2m long. A child can see that it’s smaller than Testas 12 foot Acrohc Australis and Spiess 10 foot Yankee Girl.

1956 Hannes Lindemann sailed a 17-foot Klepper folding kayak from the Canary Islands to St. Martin in the Carebian. His boat was 5.2 meter long, the weight was 25 kilos. With food and Hannes, 90 kilo heavy,  it displaced 300 kilos.

Testas 3.55 m boat displaced 800 kilo, Spiess 3.05 m boat 1000 kilos.

To any rational mind Lindemanns boat was the smallest.

I like to add that I think that Testa and Spiess made very interesting boats and voyages. I have read their books several times and enjoyed and learned a lot.

They did go their own way, so will I.

Regards Yrvind

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YRVIND TEN WAS A STEPPING STONE

Changing course has lead people to criticize me because they think I am wasting other people’s time and money. That critic would have been fair if Yrvind Ten had lead to nothing. That is not the case. Valuable knowledge has been gained. Much progress has been made that can be used on other small boats.

Serge Testas, Acrohc Australis was not twelve feet. In the back end she had a big outboard engine and in the forward part a bowsprit. Although these things no doubt could be removed, they were permanent.

This is not against common practice, and it’s the duty of o person trying to brake records to try to stretch the rules and to find loop-holes. Tax layers do that all the time as do people involved in for example Am Cup.

I mention earlier the “Hula” that added unmeasured buoyancy to New Zeeland’s Am Cup boat. On a ten feet boat you could add huge twin buoyant rudders, then locking them making it into an twenty feet trimaran and still sail within the ten feet rule.

Hugo Vilens April Fool was not a healthy boat either. Not before he added an outboard engine could he get offshore. Gerry Spiess and Serge Testa also had to use engines. I believe a small boat should be able to manage with an oar.

I realized that if I did not bend the rule some other designer would, but when I started I did not realize how much the rules could be bend. Size cannot be determined by only length.

Living with Yrvind Ten for tree years did teach me to think small. She was a stepping-stone to a much smaller and saner boat, Yrvind Ex Lex 4.5 x 1x 0.2 meter displacing 500 kilos a third of Yrvind Ten.

I have talked this over with my sponsors and friends and they are willing to continue to support me. In fact some of them think it’s a very good idea.

Quite a few of my supporters are turning up here in Västervik Saturday 16 of May to help me to laminate the new hull.  First I will give a public illustrated talk at Bankens Dag 13:00 in Biostaden together with Captain Thomas Grahn. Everyone is welcome to the talk.

Below the 4 cm thick Divinycell core of Ex Lex ready to recive the NM-epoxy lamination.

To be continued…

Regards Yrvind

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GLUING THE BOTTOM TO THE SIDES

I would not have the time to glue such a big piece singelhanded. I therefore bevelled the edges. Put the pice in position and used small vedges to glue it together.

The three following pictures hopefully explains the procedure.

From the front

from the back

To be continued…

Regards Yrvind

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BOLTED-ON BUOYANT AND FAIRED EXTENSIONS

Bolted-on buoyant and faired extensions. 2003 New Zealand used a ”hula” a hull buoyant appendix on their Am Cup boat. It was protested against, but found legal. It was not bolted on but just attached in the very middle of the boat leaving a 5 mm gap to the real hull.

They where of course rule cheating but that’s legal, so would my Bolted-on buoyant and faired extensions be. I think it is the duty of a competitor to try to find loopholes.

Big company’s find loopholes and pay no tax.

When I started with the Around in Ten I had not studied the legal aspects of the race. Rudders are buoyant extensions not measured, so are hulas but all this is no fun. It leads to unhealthy boats. Yrvind Ten would in reality be legally about four meters long with the extension and I do not think I would be proud of cheating, therefore I decided to build a smaller boat.

Regards Yrvind

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ABOUT RETHINKING

Some people mind that I have changed my mind, but only idiots never change their minds. It is me who is going to do the sailing I therefore have the right to change my mind.

The note belov have been hanging on my wall for over a year.

The hull of the new boat is extremely easy to build. I know that the hull is the quickest part but I built a few other boats so I have something to compare with.

One side of the hull is already covered with 4 cm thick Divinycell.

To be continued…

Regards Yrvind

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CONSTRUKTION HAS BEGUNN

I have now started to work on the Divinycell. Below is a picture where I glue two sheets together. As clamps I am using rigging screws and Dynema rope.

Below is some pictures of the modell rigged for differnet wind conditions. First from the side with the wind aft.

The above picture shows the unstayed masts. They are leaning 14 degrees outboard. In heavy weather I will use the windward one and one sail. The mast then contributes to stability.

The total lenght of the masts are about 2.4 meters and less heavy than an oar and can easily be moved arond.

In real strong vinds I will use a short mast 1.2 meter long 0.9 meter above deck and a reefed sail.

This boat is much smaller than Yrvind Ten. Only a third of its displacement, 500 kilos with food and water ready for a long high altitude passage. I have lost interest in Around in Ten.

The boat I call her Yrvind XLX .5 is 4.6 meter long. The outside beam is 1.04 meter, the inside beam 0.96 centimeter. Headroom below deck is 0.7 meter. XLX stands for Ex Lex meaning without law, with the European Small Craft Directive in mind .5 means half a metric ton = 500 kilo.

Wheight is a better measure of size as it is more difficult to cheat with it.

To be continued…

Regards Yrvind.