I was chatting to Arne Kverneland yesterday about the possibility of putting a junk schooner rig on Mehitabel. My criteria were that the sail plan would have 50 sq m of sail, equal to the bermudan rig with 150% genoa flying, in order to maximize light-air performance, but the challenge I posed was that the mainmast had to be in the same position as the bermudan rig, due to structural issues. It cannot be moved further aft.
To my delight, Arne has come up with a brilliant sail plan. With full sail hoisted, the CE is a bit behind the main mast position, which will be great in very light winds, giving a little weather helm. With two panels reefed down, the CE moves back to the mast. The mainsail will get the first panel reefed down in 12 knots of wind, the second in 15 knots. At 18 knots, there will be three panels reefed down. This progressively moves the CE forward, which is what these old IOR designs need. They sail on their headsails. In 25 knots, a fourth panel will be reefed and one panel of the foresail. In 30 knots, there will be five panels of the main reefed and two of the foresail.
No further reefs of the foresail are likely to be needed until the wind reaches 40 knots, as it is the storm sail and the mast and rig will be as stout as the main. The main will continue to be progressively reefed until just the top two fanned panels are hoisted, and possibly the boat will sail to windward in extreme winds with just the reefed foresail, like many IOR boats.
As soon as the wind shifts aft of the beam, the main will be squared right out, as I did on Arion. The foresail will be sheeted in tighter, which means the CP will go way forward. I once crossed the Coral Sea in a bermudan sloop with the main squared out and the jib sheeted flat, Slocum-style, self-steering all the way with our trusty Aries windvane. As with Arion, the mainsail will be reefed earlier than going to windward due to its power off the wind.