Here are 4 pictures of the planned side by side rig with folding masts.
The above pictures (click once or twice to enlarge) shows the rig set up for reaching in light wind.
Both sails are in clear wind. The boat has lee helm. The skipper can relax and enjoy.
The above picture shows the boat close hauled in light wind. Compared to a tandem set up the sails are much better separated thus giving better flow and sail efficiency.
The above picture shows the boat reaching in strong winds.
When a boat with a mast in the centerline is reaching the sail and boom is off center unless its a square sail. By folding the lee mast the balanced lug sail will much like a square sail be centered avoiding excessive rudder action. The unstayed mast guaranties no chafe; a good thing on long passages.
The above picture shows the boat close hauled in strong winds. In real life the sail will be reefed to suit wind conditions. One mast is folded to reduce wind resistance and to lower the center of gravity and mass moment of inertia.
When using the lee mast there be more weather helm, desirable when you like to forereach witn little sail area up. Using the mast on the wind ward side gives less weather helm. It also reduces the tendency to dip the boom in the water. As a bonus one can also move the sails forward or aft by tilting them.
The side by side rig gives the prudent navigator many options and eliminates the need for autopilot or selfsteering.
I also do work on Yrvind Ten. Presently it is the boooring job of filiting and taping all the pieces of plywood and composite that makes up safe stovage space.
To be continued…
Regards Yrvind.