Sure Rael, I am with you on most of what you say.....  getting under way after a shunt happens surely and easily when sail has ample lead over lateral area or there is thrust from a paddle or blade of sorts, like your AD scull. On small proas the sculling overcomes even a lack of sail lead, so we could consider a 30 footer as being a good test case.

Thinking  about this swing Junk rig, I think that it should be be able to work on my Pahi,   if the motivation, energy and financial outlay is justified enough to shove  things along  to produce the required gear.

Swinging the sail to the new head should in theory be hassle free with development to take care of surplus sheet ends, which might work with a boom that swings through only 90 deg.

Having 360 deg rotation of the boom would require a free standing pole mast and I have to agree that cost and weight will go up considerably.

Also, I like and for practical purposes will retain the traditional shroud, which does relieve the hulls connecting structure of much loading that the unstayed mast bury area of the lee hull would have to bear.

Headstays are indispensable, so I think the sprits on my Pahi could possibly be used for carrying a ghoster, and inner stays could be runners.

Rael, what you describe as "white mans problem" re sail area lead when making way after a shunt has always been just so without necessarily being a problem, but when single handing it does become more demanding - certainly in the case of  complexity and very likely in the case of cost.

My reason for  shunting might only be the same as your's as far as the cost (in $) goes, so we can best continue discussion on this subject once more cruising time on the water has accumulated to prove the effectiveness of our respective lifting rudders.

Once the rudders have been sorted, I would like to see a sheeting system that controls the free end tidily and effectively......probably along with a boom that rotates through 360deg.

Rael, if you are dead set on using a daggerboard, for whatever reason then at least one if not a pair of other steerer foils are needed.

Looking more carefully at the footage it shows you rowing with that AD scull to get the craft veered through the wind when tacking, so a rudder probably would not achieve that yaw moment and  the cat idea would fail.Also, it was more like a 1/2 jibe to get the ama up to w/ward...is cheating as far as tacking goes.

You do use stays as well I see and the only way to get rid of them would be to step the mast free-standing, which calls for use of boards to effect balance, so it's back to two steerers anyway and being able to shunt keeps the ama to w/ward, where we want it hey?.

Scaling up and carrying the scull over at each shunt looks to be problematic, though, so I am all for having two bi-directional rudders, which is a way. to get around need for the daggerboard.

I hear what others are saying about the need for shift of CE when shunting and notice how this is working in for you, well done.

The movie and design certainly shows how successful it gets in flat water when kept to smallish scale.

Not to challenge you, but hoping you find reward..... waiting to see the cruising version.  

Noticing that tacking was a solution when backwinded and that sailing off the lee shore  seemed to work out with the ama to lee, it figures that an asset of the rig is it's ability to be stepped above deck on a multi.... should thus suit a catamaran as well as a proa and then the cat configuration wont require bi-directional rudders.

When sailing witht ama to w/ward in PAC proa mode, the balance is neat and the old 'bum steering' ( weight shift steering method) might even be a goer, if getting rid of underwater appendages is considered. 

Graham, I do  intend to finally go cruising, Greek Islands, it's high time!

Been a long 7 years and 3 proas that kept getting smaller and smaller, The first one a 23 foot bomb shell that almost killed me is waiting for such a rig which will happen spring next year. Next, I hope to build a 33 footer, a 10 meter, Still I feel I will be able to work it the same way, a bit of muscle, not more..... The wind does half the work for you anyway....

Just for fun, here's Crystal Clears maiden voyage, This girl flattens seas......

https://youtu.be/4yAm2QgKc1c 

And Thanx for sharing your opinion about the potential, cos I really hope this thing changes what many people think about Pacific Proas. Cos I have a dream.... A day will come, and in every marina the will be  a junk rigged proa.........