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December 29, 2012

BRONZE SOLES

The bronze soles are now sequrly in place . They are there to protect the bottom when the boat takes the ground and is being transported. They are ground plates for the lightning conductor. They do duty as ballast and they are antifouling.

It is good to have them in place but the job has taken longer than anticipated. To handle reality one is always simplifying it. Like a map if it shows to many details it just becomes confusing but this also means tha it is diffucult to estimated how much time is needed to finish the job. No problem with me I take the needed time to do a good job and I enjoy it. Building boats and sailing them in deep water that is what makes life worth living.

This time I made more mistakes than usual. By definition ballast is heavy. Each sole weighs 53 kilos or 117 pounds. When I was younger it was no problem to lift that wheight, not more than a girl and I could handle them alright. I can still lift 53 kilos. The problem now is that the next day I might get pain in my back. Freindly people in the building helped me to do the lifting but I did not want to take to much of their time and hurrid.

There are two ways of fitting the keel bolts, before or after placing the soles on the boat. If you put the soles on the boat first you do not have to worry about if the bolts are parallell to each other. On the other hand I had decided to embed the soles in elastic NM-epoxi and the epoxi has to come on before the soles and once you add the hardener the clock starts to tick therefore you want everything to go in a hurry. Parallell keel bolts it had to be.

The holes in the soles for the bolts had to be drilled on a co-ordinate table. The travel of my co-ordinate table is 50 cm but the soles are 120 cm long. To overcome that problem I screved them on a 5 cm thick particle board. that way I could slide them on the co-ordinate table and extend its range, just. As a man was waiting for me I was in a hurry and mist one out of six holes. It took longer. I got even more confused and missed a marking on the second on now the hole came just at the bulkhead. Bad luck would have it so that the pilot drill missed the reenforcement and was bent and stuck in the hull. I tried every trick. I even whent and bougt an LPG-burner and heated the drill intill it was red hot. It was a 3.5 millimeter long thin drill and the heat did not penetrate the 50 mm thick solid glassfibre. After a while it broke. Finally I succeded in drilling it out. Now I had six holes in the wrong place. I had to lift of the bronze and plug the holes. Put the bronze back and drill new holes in the correct position. The thing is not to lose patiens and the good mood.

I did not sin by making  errors. Sin is to continue to walk on a road that leads astray. Once I find myself on the wrong way I must turn back and find the good road. Then everything is forgiven. Because I realise that if I quickly and consistently discover and correct errors then in the end I will have a good boat I do not lose patience but correct mistakes.

Below follows some pictures. Click once or twice to enlarge.

Abowe. The sole on the co-ordinate table. The particle board that made me able to slide it so that I could get all the holes parallell can be seen.

Abowe tapping the holes using 3/8 UNC for the bolts. I had imported them from Topplicht in Germany.

Above. The position of the holes are marked. After that I remowed the core. Filled it with glassfibre flock and injected epoxi. A insex key on a powefull drill was used to get under the outside skin. Big forces was generated Divinycell H 100 is very though and strong. One six mm key bent like a cork-screw, 8 mm was strong enough.

Above: The core is remowed. Next stepp filling lassfibre flock with a pair of tweezers and injecting epoxy.

Above: By hanging the sole above the holes and lowering it parallell to the hull the bolt came into place nicely after a few tryes, dry runs.

Above: The keel bolts from the inside. They are that long because the elastic epoxy has a very high viscosity and the surface is very big. The sole has to be screwed down and aftertightend during several houers.

Above: The inside laminate is reenforced. Peel ply is used to get a good surface.

Abowe: The job is done and I can be proud. When turning the boat back on even keel I had to be careful. The center of gravity is now much lower and the boat had a tendency to flip over. If cought under the boat I might get badly hurt or even irreparably damaged. To avoid that a the rope below the boat is there to restrain the mowement.

Above: To spread the load I use 50 x 50 x 3 mm washers. I have not desinged this system to be sufficciently strong but for maximum strenght. Thats the way I like it. You never know when the unexpected arrivies. Then I am prepared. It makes for good sleaping to know that you have done everything and you also feel proud.

To be continued…

Regards Yrvind.




December 24, 2012

LET ME EXPLAIN.

About boats and feets. Moe Joe has misunderstood me. It is not a good idea to put in a 5 feet middle piece in my present boat to convert her to my next. Not for me. I always like to start with a clean white paper. But it is true sometime boats are successfully made bigger by putting in a middle piece, but that is mostly for cargo carrying boats.

Thing is I do not want a bigger boat. In fact I am consider a smaller one after this voyage is done. Why this present ten-footer is so big is because it is so slow and has to go such a long distance and has to stay at sea such a long time. Among other things I hope to show that measure boats by length is a bad idea.

It is not only ridiculous to have a ten feet role. It is ridicules in general to measure boats by length. Boats are three-dimensional objects in the real world objects have volume and weight. Only if such objects are similar shaped can one dimension be used as a measure, even then it will be not right because different properties scale differently like surfaces speed volume and stability.

There was once open a time a man selling whisky in all measures. A customer trying to be smart asked for one foot of whisky. The bright seller took a paper, wetted his finger in a bottle and draw a one-foot line on the paper, wrapped it up and handed it to the customer.

I like small boats. I am not going to get a bigger boat but I am going to get a smaller one, however it is going to be longer and narrower. The exact size of the next boat is not yet worked out. That is going to be one of the many pleasant occupations during the coming voyage. The designed displacement of the present boat is 1.5 tons. For the next I aim for less displacement, hopefully not more than 1.2 tons – I mean the total weight ready for an extended ocean passage of several months including me maybee a girl food and water and books. She certainly will be narrower and not so high. Captain Voss Tilikum has always inspired me. My next boat might be 8.4 meter long with a beam of 1.4 meter, a bit like some of the old whale-boats, but not a double ender. I like the advantages of doble rudders. Lenght in itself is not heavy or expensiv like one feet of whisky. My mind certainly will change many times before I make the final plans and start to build her.

If a shape is scaled up by 1.25 or more exact by the third root of 2 the volume doubles. For example comparing two similar shaped boats 4.75 meter and 6 meter, the 6 meter is twice as big.

Why do I build this ten feet boat if I think it is so ridicules? Answer it creates some very iteresting problems and nothing is as fun as solving problems. It also gives me a pensioner an opportunity to steer out to a better, cleaner, more natural world, a world were the talents I am born with comes to better use.

I like this world too, but the ocean – that is my habitat.

-:-

A dry run of the port bronze sole is now succesfully done. It has given me some trouble and taken time. The picture below is showing the keelbolts in place from the inside of the up-side-down turned boat.

The keel boalt are so long because when the bronze is put on top of the elastic NM-epoxi the 53 kilo weight is not enough to squise it out. the mating surfaces are to big. the six bolts will give enough force.

The core were the bolts penetrate the hull is replaced with solid glass reenforced epoxy. It is 5 cm thick, 2 inches. It dulls drillbits. Carbide tipped drills for composite use is expensive and I am thrifty -I like to spend my money vere they do the most good. I therefore bought cheapconcrete hammer drills, those used in the house building. I got a cheap ten dollar diamond file and rechaped the tips. Now it cuts like through butter. The file work only took 5 minutes. The below pictures are not very clear.

Abouve the drill before is started work on its tip.

Abouve the drill in the wise and the diamond files.

To be continued…

Regards Yrvind.




December 22, 2012

PREPARING THE BRONZE AND THOUGHTS ON RIGGING

I am preparing for attaching the bronze soles. The 12 silicon bronze bolts are done. The holes for the bolts are drilled and threads have been cut. The holes in the hull are drilled. The surronding divinycell core is replaced with glassfibre-reenforced epoxi. Now I am doing a dry run. I will embed the soles in NM elastic epoxy. A problem is once the hardener is added to the epoxy the clock starts ticking. For this operation I need some help. At this time of the year most people seams to be more interested in Christmas than in building boats. We will se when I get hold of a trusty freind.

Picture below show the soleclose to its position.

An other thing. The function of the spreader I consider putting between the masts is to help one mast to get help from his twin brother to take up side forces. If however both ends of the spreader are fixed like a branch of a tree growing into a tree next to it like they were Siamese twins the structure will be able to take up torsion forces. That way the structure will be much stronger also lengtwise. That thought intrigued me. Here is an experiment. By connecting the mast like a ladder one mast is able to take up nearly twice as much lenghtwise force as if freestanding.

That the rigging becomes nearly twice as strong is a good thing. What is not good is that it becomes more difficult to handle. It becomes a ladder. The ladder is 1.2 wide. That is not that bad. At the ancient time of ketches many persons did not connect the mast becouse they reasoned if one mast breakes it will drag the other with it. But if it like a bundle is tied together it becomes stronger and may not brake at all. Also two mast may break at the same time in a capsize.

There is still time to reflect. This boat is to teach me general solutions that I can use after this planned 600 day voyage when I am not restricted to a ridicules 10 feet rule.

Below is a pictures of the experiment. The person in the door has kindly been giving me a hand lifting the bronze.

A view from the side. As can be seen with the same load the freestanding mast bends nearly twice as much. The couppled masts bends nearly the same although the load is only on one. Torsion does a great job.

To be continued…

Regards Yrvind.




December 18, 2012

A COMPRESSOR

I have a new freind in my workshop. An Aerfast oilfree compressor. A boat builders workshop is neccesarily dusty so it is important to be able dust off workpieces. Epoxy hates oil, even a fingerprint can do damage in the wrong place. I hate noise I do not even have the radio on, but the new compressor is quit and fast. That makes me happy.

Regards Yrvind.




December 5, 2012

ILLUSTRATIONS

Olle Landsell, perhaps Swedens most famous nautical illustrator has done a numder of illustrations for the Swedish yachting magasin Segling. Here with their permission i show them.

Click once or twice on the pictures to enlarge them.

The above picture show the food, musli and sardines, my eating for 600 days. Also books, food for thoughts.

The above picture shows the arangements.

The sailplan and lateral area. The lateral area is the combined surfaces of the rudders and the centerboard.

Obviusly there are going to be many changes as I am building.

To illuminate I am adding a map of the 30000 nautical mile route.

To be continued…

Regards  Yrvind.




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