Close examination of the image with the mast up shows what looks like short water-stays. They appear to attach to the beams at, or near the folding joint.
In thinking about the Dotan rudders, these should make in very easy to raise the windward rudder...........not a bad idea, me thinks.....assuming that they can handle the load, and that owners are willing to put up with the slop of the Dotans.
makes sense to buy some off-the shelf rudders at start while the rest of the boat is being sorted
the weta used similar, same?, dotans for awhile which were dropped in favor of their own rudder when production numbers justified making their ownas easy saving to make as i think those dotans are over $500 each
with that simple hinge mid-beam it seems the only thing strong enough to lock the beams would be a water-stay
but again it's a prototype, a more elegant system may be down the road if this boat generates orders, the first nz built wetas had curved carbon beams, but they were switched to the 2 tubes with elbows for production reasons
i wonder who this boat is for?
if it were a TC funded build you would think he would prefer to keep an eye on it in nz
doesn't seem likely that it is vaka's
so a TC customer?
wonder where it will be shipped