Freestanding mast on deck that do not interfere with the accomodation. The bedroom in this case.
The original idea of the side by side masts was that they should not interfere with the accomodation. They proved excellent for downwind sailing also in combination with a bow centerboard.
Now the bow centerboard is replaced by ballasted twin keels. That makes the lateral area fixed. This calls for the need of movabel sail center.
Three masts in line solves that problem.
Having once used freestanding masts I do not like to go back to supported masts.
As for to not interfeer with the accomodation the masts are supported below the sail.
If I remember right a rule of tumb calls for one tenth of the mast to supported if not the forces be to big on the supporting bearings.
The edge of the 2.7 square meter sail is 1.65 the mast do not need to be more than 1.95 meter above the upper support. A 50 cm tube on deck with supports to the deck house will make the structure strong enough.
If you make something strong enough it will not break.
The boat is small and the sail is only 2.7 square meter I belive this structure will be ample strong.
For more see Yrvind.com
There you can support my project with donations via Pay pal or Swish 0706 200 550
Sven Yrvind
Hi My name is Sven Yrvind. I design, build and cruise small boats. 1962 I left Sweden in 15 feet converted Blekingseka. I soon found out that there was room for improvement. To understand the basic I began to study mathematics and engenering. 1968 I sailed to England via many contries in a converted 13 feet rowing boat. People told me I be more happy on a bigger boat. November that year I found a wreck an old steam launch build 1885 I converted her to a staysail schooner and sailed her to Rio de Janeiro. That voyage advised me that a bigger boat do not bring happiness, happiness is an inside thing. I designed a 6 meter doubble ender built her in my mother basement. Tried to sail around Cape Horn with her but was capsized and pitchpoled. Later I built an 5.9 meter boat in her I rounded Cape Horn in the southern winter June 1980. I have continued to design, build, and cruise small boats often in high latitudes. Please support me on my donation button on my site yrvind.com
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Sven Yrvind Lastest Videos
Showing 1-6 of 1571 results
17 Sep 2025 Buumkin, a good start.
This Youtube channel is about my little shallow draft boats. They are designed for a simple life and high latitude sailing. I am86 years 4 month old. A dyslectic solo sailor. I am adapting a modest size 30 year old 17 feet, 5.3 meter long high latitude can...
16 Sep 2025 The Boomkin Holder
This Youtube channel is about simple small shallow draft, high latitude, functional boats. I am86 years 4 month old. A dyslectic solo sailor. I am adapting a modest size 30 year old 17 feet, 5.3 meter long high latitude canoe cruiser of my own design for a...
15 Sep 2025 Attatchment points for hatch lines
This Youtube channel is about simple small shallow draft, high latitude, functional boats. I am86 years 4 month old. A dyslectic solo sailor. I am adapting a modest size 30 year old 17 feet, 5.3 meter long high latitude canoe cruiser of my own design for a...
14 Sep 2025 Additional Attatchment Points
This Youtube channel is about simple small shallow draft, high latitude, functional boats. I am86 years 4 month old. A dyslectic solo sailor. I am adapting a modest size 30 year old 17 feet, 5.3 meter long high latitude canoe cruiser of my own design for a...
13 Sep 2025 Same as yesterday, but better done.
This Youtube channel is about simple small shallow draft, high latitude functional boats. I am86 years 4 month old. A dyslectic solo sailor. I am adapting a modest size 30 year old 17 feet, 5.3 meter long high latitude canoe cruiser of my own design for a ...
12 Sep 2025 Six more padeyes
This Youtube channel is about simple small shallow draft, high latitude functional boats. I am86 years 4 month old. A dyslectic solo sailor. I am adapting a modest size 30 year old 17 feet, 5.3 meter long high latitude canoe cruiser of my own design for a ...
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