This is a video of the idea of the daggerboard.
It is placed foreward of the saloon/sleepingroom therefore it does not to any great extent interfere with living conditions.
When lowered there is space in the daggerboard case for the top of the daggerboard to mowe foreward thuse the bottom part can mowe aft creating the same effect as an crumple zone in a car. On the wind Exlex might mowe with 3 knots or 5 km an houer compared to 1oo for a car still the crumple zone about the same lenght.
Enjoy, regards Yrvind
A QUESTION FROM FINLAND
A QUESTION FROM FINLAND
He ask if it is not better to have more dense material in rudder and centerboard as not to stability due to flotation.
Yrvind answer:
Heavier materials low down will give more stability. Added lead will give even more stability. In the case of the centerboard, when the board is raised, more weight will make the boat lose stability.
Almost every boat is designed as if it was to be a racing boat and the same with books about yacht design. Exlex is intended for cruising, when cruising I sail mostly down wind, even though I plan to round Cape Horn, 50° south to 50° south, east to west. Exlex is designed as a low energy boat and cruise at low Froude numbers around 0.3 this reduces the energy needed to about 1/6 of a conventional boat. See my Manifesto for a more detailed explanation.
More weight in the appendices will put more strain on them; they have to be designed more heavily. This added weight would make the boat slower down wind. It will also make the boat bigger and heavier and more expensive.
I think most boats are sub optimized for windward work. Neither do I think a cruising boat shall have weather helm.
Regards Yrvind
THE BOOK
The book with famous navigators and me has arrivied.
Below two pictures.
Regards Yrvind.
A BOOK AND MORE MOCK UP
I have done more mock up, now in the saloon. I now have a pretty good idea of the finished boat. Exlex Minor have turned out very roomy despite being only 4 cm longer and 19 cm vider than Exlex that was indeed very cramped. Exlex Minor have definitely place for two persons friendly persons to cruise long distances a boy and a girl.
Edition Paulsen did 11 of October publish a book titled 100 Marin. Its a selection of famous yachtsmen from the last 150 years including Jules Verne, Bernard Moitessier, Francis Chichester, Jack London, Naomi James plus 94 other equally famous person and me. Its a mystery how I got included, but I am proud to be included in that crowd.
Below are some pictures click on them once or twice to enlarge.
To be continued…
Regards Yrvind
Exlex mockup and revolving door
Here are videos of the mockup and the revolving door
Regards Yrvind
To be continued…
DOING THE HULLSIDES
I have started to build up the hullside from the stern. Two sheets on each side are now in place. Aft is the easy part, like building a box. Simple structure, but nothing is gained by making it more complicated.
Below two pictures.
First placing the Divinycell in a good position. Important when you are working alone. Adding the NM-epoxy. Clamping it on trying to get as good a fit as possible.
The piece in place.
To be continued…
Regards Yrvind
FAIRING THE MOULD
I am now building up the mould. The plywood has to be faired to fit. First I do a rough fit with the help of a spline and some lead weights of the sides. After that the bottom sheets is put on. Now I am fairing with surfaces instead of lines. That is far easier.
The aft part of Exlex is ready for the Divinycell. The spoon bow will be much more difficult to get a good shape on. I will take my time to do good work on that.
Below some pictures.
First me with one of my favorite splines. I have had it for many years and faired many boats with its help.
Below a close up of the same spline or batten.
Below, aft end of Exlex ready to take the Divinycell sheets after first being insulated with plastic film to prevent them from sticking to the mould from epoxy that finds its way there.
The page “Exlex Minor the Idea” is uppdated 25 August 2018
To be continued…
Regards Yrvind
MY STUFF
My stuff, what I managed to salvage from Exlex has arrived from Madeira and is now in the workshop to be used on Exlex Minor.
Thanks to everyone who has donated making the expensive transport possible, including the airplane ticket for myself.
Picture below.
I am still trying to get plywood. I am hoping for next week when more people are back from their hollidays. In the meantime I am cutting out bulkheads and moulds for Exlex Minor and doing odd jobs.
To be continued…
Regards Yrvind
Yrvind explain his situation in a short video
Video made by Andreas Eidhagen
Sailing report 7
Yrvind is now on Porto Santo. He has decided to restart with a new boat. ExLex, which is basically an experiment, has some issues that must be solved. For example is the boat too heavy, which affects both speed and stability. There is a serious problem with the stering control that causes the rudder to lock. It is too cramped inside and it has not been possible to handle the sail from the front hatch as it was intended. All in all, this means that Yrvind decided to make an restart and design a new boat where these problems is corrected. Yrvind now needs to rest and comes when he feels ready with a status update here on the website.