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 1-24 of 1657 results
Creating coach roof curvature
Sven Yrvind

Creating coach roof curvature

This Youtube channel is about me Sven Yrvind. I am86 year and seven months old dyslectic solo sailor. I am building a high-latitude shallow-draft little boat to hopefully inspire the small and the thoughtful. I intend to sail to NZ eastabout in the South...
Sleeping room and dead pedal
Sven Yrvind

Sleeping room and dead pedal

This Youtube channel is about me Sven Yrvind. I am86 year and seven months old dyslectic solo sailor. I am building a high-latitude shallow-draft little boat to hopefully inspire the small and the thoughtful. I intend to sail to NZ eastabout in the South...
Hockey sticks done by the book 1
Sven Yrvind

Hockey sticks done by the book 1

This Youtube channel is about me Sven Yrvind. I am86 year and seven months old dyslectic solo sailor. I am building a high-latitude shallow-draft little boat to hopefully inspire the small and the thoughtful. I intend to sail to NZ eastabout in the South...
Hockey sticks fillets, the end.
Sven Yrvind

Hockey sticks fillets, the end.

This Youtube channel is about me Sven Yrvind. I am86 year and seven months old dyslectic solo sailor. I am building a high-latitude shallow-draft little boat to hopefully inspire the small and the thoughtful. I intend to sail to NZ eastabout in the South...
First fillets on the hockey sticks.
Sven Yrvind

First fillets on the hockey sticks.

This Youtube channel is about me Sven Yrvind. I am86 year and seven months old dyslectic solo sailor. I am building a high-latitude shallow-draft little boat to hopefully inspire the small and the thoughtful. I intend to sail to NZ eastabout in the South...
Five broken hockey sticks as grab rails.
Sven Yrvind

Five broken hockey sticks as grab rails.

This Youtube channel is about me Sven Yrvind. I am86 year and seven months old dyslectic solo sailor. I am converting a modest size 30 year old a 17 feet, 5.2 meter long high latitude canoe cruiser of my design. A little boat to inspire the small and th...
Berth harness and reading and writing table
Sven Yrvind
Wine spoils the taste of water. Big boats spoils the taste of little boats.
Sven Yrvind

Wine spoils the taste of water. Big boats spoils the taste of little boats.

This Youtube channel is about me Sven Yrvind. I am86 year and seven months old dyslectic solo sailor. I am converting a modest size 30 year old a 17 feet, 5.2 meter long high latitude canoe cruiser of my design. A little boat to inspire the small and th...
Bow board how to handle any storm
Sven Yrvind

Bow board how to handle any storm

This Youtube channel is about me Sven Yrvind. I am86 year and seven months old dyslectic solo sailor. I am converting a modest size 30 year old a 17 feet, 5.2 meter long high latitude canoe cruiser of my design. A little boat to inspire the small and th...
Sunbeam system solar panels for Exlex
Sven Yrvind

Sunbeam system solar panels for Exlex

This Youtube channel is about me Sven Yrvind. I am86 year and seven months old dyslectic solo sailor. I am converting a modest size 30 year old a 17 feet, 5.2 meter long high latitude canoe cruiser of my design. A little boat to inspire the small and th...
New rudder & Load waterline
Sven Yrvind

New rudder & Load waterline

This Youtube channel is about me Sven Yrvind. I am86 year and seven months old dyslectic solo sailor. I am converting a modest size 30 year old a 17 feet, 5.2 meter long high latitude canoe cruiser of my design. A little boat to inspire the small and th...
She is 506 kilos 30 Nov 2025
Sven Yrvind

She is 506 kilos 30 Nov 2025

This Youtube channel is about me Sven Yrvind. I am86 year and seven months old dyslectic solo sailor. I am converting a modest size 30 year old a 17 feet, 5.2 meter long high latitude canoe cruiser of my design. A little boat to inspire the small and th...
Done, the keels. It went well.
Sven Yrvind

Done, the keels. It went well.

This Youtube channel is about me Sven Yrvind. I am86 year and seven months old dyslectic solo sailor. I am converting a modest size 30 year old a 17 feet, 5.2 meter long high latitude canoe cruiser of my design. A little boat for the small and thoughtfu...
Port side of the keels laminated.
Sven Yrvind

Port side of the keels laminated.

This Youtube channel is about me Sven Yrvind. I am86 year and seven months old dyslectic solo sailor. I am converting a modest size 30 year old a 17 feet, 5.2 meter long high latitude canoe cruiser of my design. A little boat for the small and thoughtfu...
Risky healing upside down bottomheavy boat to 90°. 3 good knots to use. Here is the chosen one
Sven Yrvind

Risky healing upside down bottomheavy boat to 90°. 3 good knots to use. Here is the chosen one

This Youtube channel is about me Sven Yrvind. I am86 year and seven months old dyslectic solo sailor. I am converting a modest size 30 year old a 17 feet, 5.2 meter long high latitude canoe cruiser of my design. A little boat for the small and thoughtfu...
27 Nov 2027  Done. The keels glued.
Sven Yrvind

27 Nov 2027 Done. The keels glued.

This Youtube channel is about me Sven Yrvind. I am86 year and seven months old dyslectic solo sailor. I am converting a modest size 30 year old a 17 feet, 5.2 meter long high latitude canoe cruiser of my design. A little boat for the small and thoughtfu...
26 Nov 2025 Starbord keel in position ready for epoxy
Sven Yrvind

26 Nov 2025 Starbord keel in position ready for epoxy

This Youtube channel is about me Sven Yrvind. I am86 year and seven months old dyslectic solo sailor. I am converting a modest size 30 year old a 17 feet, 5.2 meter long high latitude canoe cruiser of my design. A little boat for the small and thoughtfu...
25 Nov 2025  Composite vs keelbolts  Wich is stronger
Sven Yrvind

25 Nov 2025 Composite vs keelbolts Wich is stronger

This Youtube channel is about me Sven Yrvind. I am86 year and seven months old dyslectic solo sailor. I am converting a modest size 30 year old a 17 feet, 5.2 meter long high latitude canoe cruiser of my design. A little boat for the small and thoughtfu...
24 Nov 2025 Making the bronze surfaces smoth
Sven Yrvind

24 Nov 2025 Making the bronze surfaces smoth

This Youtube channel is about me Sven Yrvind. I am86 year and seven months old dyslectic solo sailor. I am converting a modest size 30 year old a 17 feet, 5.2 meter long high latitude canoe cruiser of my design. A little boat for the little people. She ...
23 November 2025  Small progress Power outage
Sven Yrvind

23 November 2025 Small progress Power outage

This Youtube channel is about me Sven Yrvind. I am86 year and seven months old dyslectic solo sailor. I am converting a modest size 30 year old a 17 feet, 5.2 meter long high latitude canoe cruiser of my design. A little boat for the little man. She is a ...
22 Nov 2025 A summary
Sven Yrvind

22 Nov 2025 A summary

This Youtube channel is about me Sven Yrvind. I am86 year and seven months old dyslectic solo sailor. I am converting a modest size 30 year old a 17 feet, 5.2 meter long high latitude canoe cruiser of my design. A little boat for the little man. She is a ...
21 Nov 2025  Doing guiding pegs
Sven Yrvind

21 Nov 2025 Doing guiding pegs

This Youtube channel is about me Sven Yrvind. I am86 year and five months old dyslectic solo sailor. I am converting a modest size 30 year old a 17 feet, 5.2 meter long high latitude canoe cruiser of my design. She is a sandwich construction built with 30...
20 Nov 2025 A very sudden change
Sven Yrvind

20 Nov 2025 A very sudden change

This Youtube channel is about me Sven Yrvind. I am86 year and five months old dyslectic solo sailor. I am converting a modest size 30 year old a 17 feet, 5.2 meter long high latitude canoe cruiser of my design. She is a sandwich construction built with 30...
19 Nov 2025 Beginning the base for the keel
Sven Yrvind

19 Nov 2025 Beginning the base for the keel

This Youtube channel is about me Sven Yrvind. I am86 year and five months old dyslectic solo sailor. I am converting a modest size 30 year old a 17 feet, 5.2 meter long high latitude canoe cruiser of my design. She is a sandwich construction built with 30...
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