05H36 Performance (3)
Only when I have too much sail area out, David.Like most modern wide canoe-body hulls, Persephone sails fastest when sailed fairly flat. I usually trim (or reef) the sails to have about 15 degrees of heel.Once I find I'm having to put a lot of twist in the sails to spill excess wind, I reef-down and usually get a speed boost with the smaller - but better shaped - sail area, as she heels less.(One of the most important sailing instruments I have is my cheap inclinometer. That and the tell-tales are what I sail by. The ST60 Wind is a nice addition when fine tuning, but the little ribbons and the angle-of-heel are essential.)The stern's shape induces more weather helm as it's forced further under water by heeling. However, that is tied to her initial stability - which is form stability, not keel weight.Your deep keel will, indeed, give you a small enhancement to the boat's ultimate stability, as measured by the angle of vanishing stability. As I recall, the increment is about 2 additional degrees of AVS. I didn't feel it was worth the extra draft. (The relative amount of area under the positive and negative areas of the stability curve is essentially the same with either keel. She takes under 1/3 the wave energy to bring her upright from inverted as she does to get inverted in the first place. She's no Pacific Seacraft 40, but she's not as slow, either and has as much accommodation volume.)The boat's form stability is also due to the high freeboard.You can, of course, be heeled to 30 degrees by a big gust, but it gets very difficult to be pushed beyond that.Unless you really sail over-canvassed (or get pinned by a thunderstorm - been there, done that) you will have great difficulty getting the rail awash.(I love it when Persephone overtakes and pulls away from bigger "better" boats being sailed with their rails awash.)Will you only be sailing in deep water?Fair winds,Al