Poor mans wing mast. By turning the sail track to the lee side turbulence is reduced.
Sven Yrvind
At 86, Sven Yrvind is still pushing the limits of small-boat design. Discover the philosophy and technical grit behind his 'Exlex' series.
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As the the Ljungström mast of the rig can be rotated it can increase efficiency of the sail by greartly reduce the turbulence on the suction side of the sail. As most of the lift comes from the suction side the efficiency is much increased.
The Laser mast can also be rotated but only with angle of the boom so even if the sail is attached to the mast by a sleeve it not as efficient as the Ljungström sail with its rotating mast.
For more see Yrvind.com There you can also support my project by Pay pal and Swish 0706 200 550
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This Youtube channel is about me Sven Yrvind. I am87 year and 5 months old dyslectic solo sailor. I am building a high-latitude cruiser. She is 5.6 meter 18 feet 4 inches long. Her beam is 1.45 meter. She is a three masted lugger with a total sail area of 9 square meter. She has a bow centerboard...
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