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

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Sven Yrvind Lastest Videos

Showing 1-6 of 1549 results
26 Aug 2025. If at once you do not succeed, try,try again.
Sven Yrvind
26 Aug 2025. If at once you do not succeed, try,try again.
This Youtube channel is about me Sven Yrvind. I am86 years 4 month old 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 sail to Dunedin in NZ. There I have been promis...
25 Aug 2025 The hatches Tufnol gets prepared for glass fiber
Sven Yrvind
25 Aug 2025 The hatches Tufnol gets prepared for glass fiber
This Youtube channel is about me Sven Yrvind. I am86 years 4 month old 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 sail to Dunedin in NZ. There I have been promis...
24 Aug 2025 Fore hatch, guiding lines
Sven Yrvind
24 Aug 2025 Fore hatch, guiding lines
This Youtube channel is about me Sven Yrvind. I am86 years 4 month old 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 sail to Dunedin in NZ. There I have been promis...
23 Aug 2025  Critical placement of bow hatch latches
Sven Yrvind
23 Aug 2025 Critical placement of bow hatch latches
This Youtube channel is about me Sven Yrvind. I am86 years 4 month old 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 sail to Dunedin in NZ. There I have been promis...
22 Aug 2025 The Evolution of the Oceanic Flaneur
Sven Yrvind
22 Aug 2025 The Evolution of the Oceanic Flaneur
This Youtube channel is about me Sven Yrvind. I am86 years 3 month old 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 sail to Dunedin in NZ. There I have been promis...
21 Aug 2025 Bow & Aft hatches, the start
Sven Yrvind
21 Aug 2025 Bow & Aft hatches, the start
This Youtube channel is about me Sven Yrvind. I am86 years 3 month old 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 sail to Dunedin in NZ. There I have been promis...

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