How stable is the Shoalsailer?
There are two ways to calculate stability. Using the traditional “hull only” formula, the Shoalsailer shows 29,000 foot pounds of stability at 58 degrees of heel and remains positive until 112 degrees, meaning that the Shoalsailer will not capsize in any but extreme situations such as those encountered offshore in the Perfect Storm, or in the Roaring Forties in the Southern Ocean. More significant is the fact that the Shoalsailer has a stability curve similar to other monohulls but much better than the abrupt stability curves found in multihulls (see the stability curve). A few designers and builders use another method to calculate stability using the deck buoyancy, but this method provides a higher and somewhat misleading degree number so it is not used for the Shoalsailer.
