Solving the Ljungström gooseneck problem or how to attach the boom when the mast is rotating.
The Ljungström rig invented in Sweden by Fredrick Ljungström in 1933 have some very desiriable properties.
Foremost is the ease to reef. The freestanding mast is just made to rotate to pull on a rope, like a furling jib.
This rotation also makes it possible to get outstanding aereo properties on the wind by turning the mast so that the leech is to lee. That way the mast acts nearly as a wingmast.
The rig was never a succes. It had one bad property. The boomless rig made it difficult to properly sheet the sail.
A partial solution was found in 1945 when a small mast was placed on the aft deck to take the sheet.
My idea is to rake the mast 20° aft then the sail can be sheeted like a jib.
Now I have a second idea and that is to put the upper mast bearing above deck just below the sail in a pipe and on the top of that pipe put the gooseneck. This video illustrates my thinking.
The free standing part of the mast will also be shorter and therefore stronger.
With these improvements the modefied Ljunström rig will work on my boat just fine I hope.
For more see Yrvind.com
There you can support my project by donations via Pay pal and Swish 0708 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
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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
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