I was challenged back channel about my statement that stability curves in Sea Kayaker are confusing because they assume a lower center of gravity than is realistic. Sea Kayaker uses 10 inches above the lowest point of the seat. I would have to admit that that measurement is, in fact, reasonable. Personally, I am top heavy and heavier than their theoretical paddler, but really their "standard" is defensible. The center of gravity of people is actually quite variable, but Sea Kayaker is not out of line. Females and small people have lower center of gravity and males and tall people higher. I think that the most important feature of stability curves is in their value comparing one boat versus another. As long as you maintain a consistent standard, this should work. The absolute value of the righting moment is very variable depending the actual center of gravity of the system and thus perhaps of less value. If someone uses 11 or 12 inches for the height of the center of gravity, the curves will look very different but the relative pattern comparing one kayak with another is maintained. Sea Kayaker has a web page that discusses the methodology of their testing / calculations. http://www.seakayakermag.com/PDFs/Kayak_Reviews_Info.pdf *************************************************************************** PaddleWise Paddling Mailing List - Any opinions or suggestions expressed here are solely those of the writer(s). You must assume the entire responsibility for reliance upon them. All postings copyright the author. Submissions: PaddleWise_at_PaddleWise.net Subscriptions: PaddleWise-request_at_PaddleWise.net Website: http://www.paddlewise.net/ ***************************************************************************
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