Re: [sailing_canoes] Re: Tripper Clipper canoe/Sailing rig and amas?
Well... I am no expert but here is how I see it. I suppose narrow beam at the waterline would be good for speed when paddling, and small rocker would help tracking while paddling in windy conditions. My experience sailing and paddling a 16.5 foot swift Dumoine, with 92sf of sail almost exclusively on salt water has probably confirmed this. It is a river tripping boat with 3" rocker bow, 2" rocker stern and is 37" wide at center. It is a little slower than the Clipper tripper when paddled, and is a real handful paddled in windy conditions. Things change when you add sail though. There is no problem with tracking in wind, as the leeboard and rudder completely change the handling of a sailing canoe. When you need to tack, with the extra rocker you can come about smartly without a lot of extra resistance from the hull. The extra width gives you more stability to handle the sail without amas, and if you have amas it will tend to give the boat lift, and it will plane more easily.
In winds of say 12 to 18 Knots my boat will do 7-10 knots with just me aboard, skipping across the wave tops, the bow completely out of the water. I think that the wide hull is helping speed by creating lift. With two on board things slow a bit, but she will still get up and go in the right conditions. With full camping gear and two sailors aboard we are basically stuck at hull speed, about 5-6 knots no matter how hard she is pushed. The bow comes up, the stern sinks down very close to the water line, and we make a huge wave like a power boat.
What I gather from this experience is that you can not look to the traditional canoe paddling wisdom for answers to the which boat question. More rocker seems to be a good thing for handling in waves as well.
The windage question is a good one. I think you would be better off with lower freeboard, if you are willing to use a heavy duty spray skirt most of the time, or better yet make a hard deck like the Kruger's. I have not noticed much problem with windage until wind is at 20 knots or more, then I can lose enough momentum in a tack so that the boat will not come about. The sails would be reefed at that point, and the ratio of sail area to hull windage starts looking iffy. At 20 knots I am generally looking for somewhere to land if the wind is in my face in any case! I have a spray skirt that covers the mid section of the boat. With the single ama we have to move with every tack in windy conditions, and a full skirt just gets in the way. I have found that loading the boat and positioning the bow sailor is critical for wave handling. Keep the weight centered and out of the bow and it will be a much drier ride. My bow partner will generally not sit in the bow seat, but just aft of it on the thwart, when we are sailing to windward in a blow (Another point for a fuller bow.)
Hope you can make sense of all that.