Swing Rig Info

VAN DE STADT DESIGN

YACHT DESIGNERS & NAVAL ARCHITECTS

VAN DE STADT SWING RIG

Patent no. 1020239

Unique rig that is very simple and easy to handle.

Unique because of the rotating carbon fibre mast, which carries a part of the sail forward of the rotating axis. This makes the sail well balanced and results in minimal sheet tension.

An unstayed mast reduces drag and makes it possible to let the boom further forward than athwartships. As a result the sail also retains an ideal profile in relation to the wind on a broad reach or run, and continues to produce lift.

When the sheet is eased the mast rotates and cants to windward. This is already initiated on a close-hauled course by creating an angle of approx. 50 degrees between mast and boom.

Unique because of the mast section is set in relation to the boom and sail, thus creating a flowing wing profile. The result is a sail that is highly efficient for all points of sailing.

The mast section is set by the means of a hydraulic cylinder.

GYBING

Simple and easy to handle.

The entire rig is controlled with just the mainsheet. This sheet can be a single rope because the sail is balanced by the location of the rotating axis.

The mast can rotate 360 degrees, which is another unique feature of the SwingRig. With the help of a second sheet that is led forward of the mast SwingRigged boats can gybe like a wind surfer. This makes them easier to sail, particularly in heavy weather.

Reefing downwind is a piece of cake, too.

VPP calculations and sea trials with equal boats show that on broad reaches and runs the SwingRig reaches the same speeds as a sloop rig with spinnaker.

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Last modified: August 5, 2008