Stavanger, Thu
Chris. Your situation illustrates that a forced position of a mast, far forward or far aft, may dictate the shape of sail plan (on a sloop). To my half-trained eye it appears that your sail sits very far forward. Experience with cambered panel junk sails have convinced me that the CE of the junk sail may well sit 5% of the WL aft of the BM rig‘s CE - that is if the balance was OK with the BM rig. Even if you used to have problems with weather helm, I doubt if you need to move the JR’s CE forward of its original position.
If a mast is forced to sit far aft, then a sail with big balance would be needed to get the CE right. One then has the choice between the Van Loan style sail with a low yard, or the split junk. I certainly would go got the latter.
If the mast is forced to sit far forward, a sail with little balance would be better, I think (or a little mizzen could be added). The choice is then between the high-peaked HM sail, like Johanna’s, or the high-peaked fanned sails like those on Fantail and Tystie.
Now I have added a 30sqm HM sail to your last sail plan. I have in my pc a stack of standard sails with varying aspect ratios so could just pick one and quickly scale it to the needed area. The HM sail would actually need the mast even further forward (along that meter scale) and a LAP of 8.0m should do. An added asset with this sail is that the foredeck area will not be blocked by the overlapping sail bundle so anchor handling will be easier.
One more thing: Even if you manage to balance your boat upwind, the weather helm will increase on a beam-to-broad reach when most of the sail will sit outside the boat. To cope with that I suggest you add a set of end-plates to the rudder, as shown on this Freedom.
Whatever you go for, good luck!
Arne
PS: Idrafted this letter before your last posting - it seems that we think along the same lines.