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Only fairing the pattern today.
Sven Yrvind

Only fairing the pattern today.

Today I did a bit of fairing on the keel pattern. I used a new product from the auto industi. It cures in only 15 minutes. I am used to 24 hours curing time. The time to my disposal including cleaning the tools. It was a start. I do more tomorrow. I am tired today as much of the night was spent to k...
  • Mar 24, 2022
  • Language: EN
  • Play Time: 00:01:13
Shaping the keel pattern.
Sven Yrvind

Shaping the keel pattern.

The six 4 cm Divinycell pieces are now glued together with NM-epoxy. Time for shaping. This is dine by eye and a good thing is if the keels can be symmetrical that the boat do not sail in a circel. To make work more easy I made a holder for the pattern. Now it easy with the longboard do grinding. Fo...
  • Mar 23, 2022
  • Language: EN
  • Play Time: 00:02:09
Saving work when making the pattern for the foundry. One template for the different sections.
Sven Yrvind

Saving work when making the pattern for the foundry. One template for the different sections.

It takes six cut outs of 4 cm to build up 24 cm pattern. They are all of different lengt as the leading edge slopes 45° But by dividing the template into fractions and moving it bit by bit I can use the template for all the six pices even as they are of different lenghts. For more see Yrvind.com The...
  • Mar 22, 2022
  • Language: EN
  • Play Time: 00:02:31
A better model of the rigging. The rig now have vertical battens despite a lot of hesitation.
Sven Yrvind

A better model of the rigging. The rig now have vertical battens despite a lot of hesitation.

After much hesitaion and apprehension I now go for vertiacal battens, two in each sail. This allows me to reduce the height of the mast to 2.2 meter freestanding. The sail area is 3.24 square meter. Small things attract small forces. The battens therfore will not need to be very strong. There will b...
  • Mar 21, 2022
  • Language: EN
  • Play Time: 00:02:46
Designing and cutting sections for the bilge keels.
Sven Yrvind

Designing and cutting sections for the bilge keels.

Most builders use NACA sections for keels. Not me. Bescause NACA sections are made for airplanes and the NACA sections have infinite aspect ratio far from my bilge keels that have a cord of 1.5 meter and a lenght of 0.25 meter that is an aspect ratio of 0.167. The inducet resistance, the creation of...
  • Mar 20, 2022
  • Language: EN
  • Play Time: 00:04:29
Bilge keels mock up and dimensions.
Sven Yrvind

Bilge keels mock up and dimensions.

A bit more work on the rigging on the model then I will start to do the patterns for the bilge keels. Many things have to be considered. Like their position in relation to the sails. As it is free standing masts they have to be near the bulkheads. I like to be able to adjust to get lee-helm or weat...
  • Mar 19, 2022
  • Language: EN
  • Play Time: 00:05:04
Modifying the modifiyed Ljungström rig with a J-sprit to the vertical club.
Sven Yrvind

Modifying the modifiyed Ljungström rig with a J-sprit to the vertical club.

One thing leads to an other.The gone centerboard replaced by bilge keels needed a mizzen to give her weather helm when so desired. The problem back there with the double ender was sheeting. At first I was back to the balanced lug sail for the mizzen. The balansed lug sail have several desirable prop...
  • Mar 18, 2022
  • Language: EN
  • Play Time: 00:04:02
Turning Exlex upside down to make a pattern for the bilge keels and to plug the centerboard hole.
Sven Yrvind

Turning Exlex upside down to make a pattern for the bilge keels and to plug the centerboard hole.

Now I have turned Exlex upside down to plug the hole where the centerboard should have been. Also to design and make patterns for the bilge keels. I started to build Bris 1971 and sailed her in the North Atlantic and South Atlantic, that is by definition south of the equator. The trade wind route f...
  • Mar 17, 2022
  • Language: EN
  • Play Time: 00:02:44
Laminating the place where the CB was. Also getting ideas of the mizzen mast.
Sven Yrvind

Laminating the place where the CB was. Also getting ideas of the mizzen mast.

Today I have been making the centerboard plug made of Divinycell smoth and laminated it with carbon fibre. A simple step. Also I have been thinking about the mizzen mast. I am quite pleased with the idea of the modified Ljungström rig. I am considering it also for the mizzen. Maybee I can make it li...
  • Mar 16, 2022
  • Language: EN
  • Play Time: 00:01:02
Plugging the centerboard hole. I begin with the Divinycell. I thank everyone for giving keel advice
Sven Yrvind

Plugging the centerboard hole. I begin with the Divinycell. I thank everyone for giving keel advice

I have started to plug the hole I made for the centerboard. I started to fill the hole with Divinycell. Next I grind it smoth and even then I laminate on top. That done, next step is to turn the boat upside down. To smoth the outside and laminate it. There is one more reason to have the boat upside ...
  • Mar 15, 2022
  • Language: EN
  • Play Time: 00:02:48
Progress has no price. Unlearn and rethink. I am killing an other darling. The centerboard is gone.
Sven Yrvind

Progress has no price. Unlearn and rethink. I am killing an other darling. The centerboard is gone.

The bilge keels gets quite a lot of surface. They will I think be big enough to create enough lateral resistance. According to the book, 3.5 percent of the sail area is normal. With my bilge keels I can get twice that area. The problem is to create lee helm if I eliminate the centerboard. The soluti...
  • Mar 14, 2022
  • Language: EN
  • Play Time: 00:04:17
The two old bilge keels are now klean after brutal work. They are ready to be reshaped.
Sven Yrvind

The two old bilge keels are now klean after brutal work. They are ready to be reshaped.

After two days of brutal work the old bilge keels are now ready to be reeshaped. Mikael at Lammhults Gjuteri is going to calculate the weights if keels with different wall thicknesses. The front and bottom are going to be thicker for strenght. I aim at 125 kilos for each keel. For more see Yrvind.c...
  • Mar 13, 2022
  • Language: EN
  • Play Time: 00:01:56
Recycling bilge keels from Yrvind Ten. Hard work but much saved.
Sven Yrvind

Recycling bilge keels from Yrvind Ten. Hard work but much saved.

2015 about that time I realised that I could not be happy with Yrvind Ten so after about three years I scrapped her. The bronze bilge keels I saved for a time they might come in handy. Now is that time but they will be cast into a different shape and more bronze will be added. I guess they are about...
  • Mar 12, 2022
  • Language: EN
  • Play Time: 00:02:10
Today I visited Lammhults foundry. Reasoin is I hope they can make my bilge keels in bronze.
Sven Yrvind

Today I visited Lammhults foundry. Reasoin is I hope they can make my bilge keels in bronze.

I go for broke becouse only the best is good enough for my boat. Bronze keels are antifouling because they are 90 % cupper. Bronze is expensive but it is also strong and resiliant. It feels good to know that will Exlex be bumping on the ground with a ebbing tide in wild Falkland islands or Patagonia...
  • Mar 11, 2022
  • Language: EN
  • Play Time: 00:01:11
Preparing for installing the longitudinal sides in bedroom and dining room. New NM epoxy.
Sven Yrvind

Preparing for installing the longitudinal sides in bedroom and dining room. New NM epoxy.

To make a perfect fit I will inject NM-epoxy between the fillets as done before. Now the groove is much longer so I am getting nervous that the epoxy will cure before it reached all the way. Now with the NM-injectrion epoxy it will be better. Its curing time is 180 min 3 houers I said wrong in the v...
  • Mar 10, 2022
  • Language: EN
  • Play Time: 00:01:46
My landlords kindly sponsors part of my rent for 30 months. A big worry gone for 2 1/2 years. Luck.
Sven Yrvind

My landlords kindly sponsors part of my rent for 30 months. A big worry gone for 2 1/2 years. Luck.

Ekonomy gives more problems than all storms together. Now thanks to the landlords of my workshop the rent for two and a half year is payed. If I have no money for the boatbuilding there is always something on the boat I can improve that do not need money. And the vieuvers of my channel gives donatio...
  • Mar 09, 2022
  • Language: EN
  • Play Time: 00:02:51
A rough provisional estimation of the itinerary for my Cape Horn doubling.
Sven Yrvind

A rough provisional estimation of the itinerary for my Cape Horn doubling.

Doubling the Horn Provisional itinerary Doubling the Horn entails sailing nonstop from a point above the 50th parallel in the Atlantic, down around the Horn and back to a point above the 50th parallel in the Pacific. Only this near 1,000-mile passage is considered a genuine Cape Horn rounding. ...
  • Mar 08, 2022
  • Language: EN
  • Play Time: 00:07:54
Unlearning and retinking. The plan was to sail to NZ, but the Cape Horn route needs rethinking.
Sven Yrvind

Unlearning and retinking. The plan was to sail to NZ, but the Cape Horn route needs rethinking.

The change of route from NZ to doubling Cape Horn have left much hidden residue. I have to be eagle eyedness is needed to detect it. Luckily last night I got the idea to move the water under the seat. I was lucky that previus to that I had narroved the bed from 90 t0 80 cm wide. Now 6 jugs an even n...
  • Mar 07, 2022
  • Language: EN
  • Play Time: 00:02:36
How to simplify a problem. Here tracks for the sliding hatches.
Sven Yrvind

How to simplify a problem. Here tracks for the sliding hatches.

To design and build an ocean going boat is a complex problem. By dividing the problem into smaller and smaller parts it becomes simpler and simpler until in it is straight forword. A curved line is more complicated than a stright line. But every time you subdivide it into smaller segment they become...
  • Mar 06, 2022
  • Language: EN
  • Play Time: 00:03:09
Adapting to changes of route, less water, masts mowing aft.
Sven Yrvind

Adapting to changes of route, less water, masts mowing aft.

The change of route from NZ to Chile and cruising northern Patagonia reducing needed food from 180 to 100 days and making bilge keels neccecites and permittes many changes. Now I need only 100 hundred liter water. My green plastic can holds 5.5 liters. 6 will be below my seat, 10 will be below my be...
  • Mar 05, 2022
  • Language: EN
  • Play Time: 00:03:18
Duplex stainless steel. Very corrosion resistant very strong and magnetic in this application good.
Sven Yrvind

Duplex stainless steel. Very corrosion resistant very strong and magnetic in this application good.

Across the street, I am lucky, Grönitz do buiseness in steel. Today I found duplex stainless steel. I was looking for something else a weight that drags the chain through the PVC lined hawse pipe but luck favors the prepared mind. Below is somthing about Duplex. Duplex stainless steels[1][2][3][4]...
  • Mar 04, 2022
  • Language: EN
  • Play Time: 00:03:42
A self tailing winch for warping, warping me up a beach or waring afloat after I run aground.
Sven Yrvind

A self tailing winch for warping, warping me up a beach or waring afloat after I run aground.

This Andersen 28 self tailing winch shall give 28 thimes the force. I do not know how much force I still got in my arm 20 maybe 30 kilos. That times 28 is something like 700 kilos. With the longer lever 800 - 900 kilos. Using a block 1700 kilos. Then in the real world there is friction. Still I it i...
  • Mar 03, 2022
  • Language: EN
  • Play Time: 00:02:35
The importance of CB & bilge keels. Because a rised CB gives trouble free stable downwind sailing
Sven Yrvind

The importance of CB & bilge keels. Because a rised CB gives trouble free stable downwind sailing

Weather helm is important when sailing into the wind. But most cruisers avoid sailing to windward. When sailing downwind weather helm is a pain. By with my bow centerboard rised I get lee helm and a boat that is stable sailing downwind. The use of my bilge keels will be in getting the ballast low fo...
  • Mar 02, 2022
  • Language: EN
  • Play Time: 00:05:38
One more darling gets killed in this video, the mowing ballast.
Sven Yrvind

One more darling gets killed in this video, the mowing ballast.

Doing some volyme calculations on the bilge keels I realised that there can be a lot of low weight in them. That will increase stabilite a lot. I also realised that with bilge keels the mowing ballast was now less important. To keep things simple I am eliminating the mowing ballast. These keels migh...
  • Mar 01, 2022
  • Language: EN
  • Play Time: 00:02:18
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