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June 4, 2025
Sven Yrvind – Page 9
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....
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 w...
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 d...
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. No...
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 tir...
Grid scored Divinycel I use to take of the shape of the hull to use as a flange for the keels
Diab makes grid scored Divinycell. It is Divinycell sheets cut into tiny squares glued toa matt. They can thuse bend into 3-dimensions. If you lay them on the hull and apply epoxy that will freese them into position. That done you have the shape of the hul...
Getting the flange and keel pattern together. Gluing and fillets. The result not excactly straight.
Now the keel pattern is on the flange. When done I noticed that the keel is not excactly straight. I have to live with that. Comforting myself that boats do not sail stright and that I am human. Anyway tomorrow I can take the mould of the hull and turn the...
The pattern seams to fit on port and starboard. Stronger flange and the boat is back on even keel
I did put the keel in the middle when adding the flange. The reason was to get one pattern for port and starboard. The middle of the boat would be a compromise. That way I will only have to adopt a little to each side to make a good fit to the hull. I had ...
The force needed to break my darling.
Peter is back. Here he is helping me to demonstrate how strong my darling was. Was because she is no more. I have decided that the bulkhead hatches take up to much space. A video from 22 January show me getting into the fore compartment with a Center board...
After experimenting for some 3 months Yrvind is now back in production.
I have been experimenting for maybee 3 months or so. During that time much wothwhile development have been done. The modified Ljungström rig and the twin keels will be great improvements. The Ljungström rig promis to make the boat more weatherly. The twi...
Not much today, just taping fillets in the dining room.
This is not very exciting just taping fillets in the dining room, but it makes progress and makes the boat stronger. Things are going well. Before the plan was to have water in the dining room below the seat. Now water is mowed to under the bed. That way I...
Today advice from a master racing skipper and boatbuilder
Today Göran Marström did visit my workshop. I asked him many questions about my planned rigging and upcoming voyage. I got the impression that he did not disapprove. Things are moving along. For more se Yrvind.com Here you can support my project with don...
Work on the storage in the dining room. Also sensational rumors of a navigational tunnel.
I am working on the storage in the dining room. They are in two etage. An upper with sliding locker and a lower with lids from the side. The space is also divided into smaller parts. There is also rumors of gigantic project. A navigational tunnel below the...
A shelf and some work on a new 1:20 model.
The work in the dining room continues. Today a shelf have been added. But mostly I have been busy with a new 1:20 model. The old one have had to many changes. It have been the centerboard, the rigging have been moved several times and twin keels added. As ...
More on the dining room stovage. A subdivision. Also model work. Also a bonus.
Work proseeds nice and slowly. Today I have added started on a subdivision on the shelf. It is important to keep things restricted on a boat that is mowing. To keep the lockers small is a GOOD IDEA. Also a bot more on the model, now the beginning of the de...
Lammhults gjuteri Delivering the pattern of the bronze keels. Important day. Casting soon.
Today an other worthwhile drive. Håkan lent me his van and with the old bronze keels to be recycled and the pattern I have driven to Lammhults Gjuteri in Lammhult not far from Växsjö Småland. I was shown around seeing a lot of patterns. Most of the pro...
Today back from Lammhults Gjuteri, the foundry, not much done, but a start of a few.
Curius about my new destination, Isla Chiloe I ordered a chart from my The Admiralty catalog that I got for the millenium 2000. Seams that time has passed and changed have been made in the elapsed time. The chart number was OK but it was from a place in In...
A bit about a big change and some more.
One thing leads to an other and often the cause is not obvius. Here the Putins war lead the idea of visiting Falkland Island and Isla Chiloe. Falkland and Chiloe lead to twin keels. Twin keels lead to the decision to go skip the modified Ljundström rig a...
The case for the tilting biplane rig.
Some people say that it is complicated to tilt a mast. I say thats not so if the mast is small on a small boat and if it done in simple way. A freestanding mast stands in a prismatic socket. However if one end of the socket is larger than the other the mas...
To wedge the tilting mast or lash it. Thats the question. + Bonus
Yesterday some people suggested that I should use wedges for the tilting mast. That would keep it in the desired position sequerely. The new problems arose. How to unwedge the mast. That is certainly possible but most likely a tool is needed at least occas...
Work on the sliding hatch lids for the lockers in the dining room.
Here is more work on the lockers in the diniong room. I am trying to get it good. I started with the port side. If it works I do the same on the starboard side. Work brings surprises every day. That makes it eventful. I do not need other entertainment. In ...
Tacking up panels. Not much to show.
HI friends. Today I have been tacking up panels as subdivisions and part of the food box I will sit on in the dining room. Time is mostly spent on deciding where to cut and where to place the parts. As time passes there will be less and lesss choises, easi...
Not much just a few steps towards the accomondation.
The accomondation consists of a lot of small pieces panels subdivitions and so on to keep track of things and to keep things in place out on thebig waves. Little by little progress is made. The difficult things is to arrange so that the boat functions and ...
Rods for the dining room vertical hatch lockers and more fillets.
The hole for the rods to the vertical hatch covers is now done. Here is a test with a wooden rod. I might use metal pipes, 8 mm diameter. I have copper. I might even get stainless steel. Piece by piece the accommodation is getting in place. This is a job t...
Starting on the seat that is the lid for the central dining room storage.
Not much done today, but got an idea how to proceed. Did some gluing up for tomorrow. I am working on the central storage below the seat in the dining room. I have also got an idea how to do the reefing in a simple way. On Exlex 2018 and Exlex 2020 I messe...
The seat and the boom. The seat feels fine, the boom more later.
Now the dimensions of the seat is determined. It feels fine. It is going to be a pleasure to sail a boat with such a nice seat wathching all around everything that can bee seen through the windows. The boom is just experimental. It is a wooden one and is n...
Balanced lug slab reefing. Here a 2 meter long rope represents a 2X2 meter, a 4 square meter sail.
Peter is not here. But try to imagine this rope representing the bottom of a 2X2 meter square sail. In the fromt eyelet I put a loop with a loop. I peg it on a peg. That way the bottom fromt of the sail is attached. In the back I use a line as an outhaul....
Miscellaneous, the mock up boom, the real rope hinge, locking nut for the seat stovage, rig on model
HI friends. Today I have done different things. During my evening walk I realised that to get most force from the reefing line to the sail the lines must be parralell. Easy to understand if you are familiar with vectors. Vectors is a concept useful to sail...
Not much, just a few small steps.
Today I have been working with the dining room, to secure the hatch lid for the stovage below the seat. I have fastened two long bronze nuts. Screws into them will hold the lid. The are fixed with screws and NM-epoxy and glassfibre. To prevent epoxy from e...
Subdivisions and preparing for the screws that will secure the seat hatch
Mainly today I have worked on preparing for the two screws that is going to hold the hatch in the dining room. One screw would have been plenty but I like to have redundancy so two screws there will be. First I put the long bronze nuts in place. Then I scr...
The screws for the hatch in the dining room are now in place after a bit of drilling and filing.
The two screws for the hatch are now fitted. There is mostly some filing to do as I can newer get it precise from start. But good enough. Also a few more subdivisions are made on the side compartment below the sliding hatches. I am also preparing for the t...
A sea chart showing my planned landfall in Chile hava arrivied and important Peter in uniform
Originally the plan was to sail to NZ eastabout south of Africa and Australia. however after much thinking a new plan Falkland Islands Cape Horn and a landfall in southern Chile was decided on. The ordered sea chart for the possible places in Chile have ar...
Day befoere birthsday much feast, not much work. Reason tomorrow many of my friends are elsewhere.
We have had feast today because tomorrow many of my friends are at work elsewhere. A bit work on the hatches have been done and thats good. for more see Yrvind.com. There you can support my project via Pay pal and Swish 0706 200 550
After a long time I am now 83 Years old for real. And I ask for donations to continue my building.
After a long time I have now reached 83 years of age. Many things have happend during thosen many years. Here is an appeal. I ask for donanations that I may continue the building of Exlex. Ordinary I get money from talks and books. Corona have put an end t...
Transfering water from jerrycan to bottle with no spilling even in stormy weather.
This is the method I use to transfer water from jerrycan to bottle. I will have 12 or maybe 18 green nomally 5 lite jerrycans. The same type NM-epoxy use for the resin. The are of good quality approved for dangerous goods. To transfereing the water without...