Saturday, August 24, 2019
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Boat TestFeatured

Are Power Cats More Stable than Monohulls? – World Cat 280CC-X

World Cat 280CC X Multihulls Magazine

This 27’6” (8.38 m) catamaran has two hulls, widely spaced, each nearly at her beam ends, rather than a single monohull that is deep on the centerline and shallow at the chines.

Today’s question comes from a BoatTEST.com member who wants to know more about catamarans: He asks, “Are power catamarans considered to be as stable as V-hull boats for offshore fishing? And are power catamarans gaining or losing market share among boaters?”

The World Cat 280CC-X is a good example of a modern catamaran designed for fishing and day cruising.
Which is more stable, a catamaran or a monohull? This answer is easy. Despite what you may have read in some boating magazines, a catamaran is almost always more stable than a V-bottom monohull. In fact, the deeper the V, the more prone to rolling the monohull becomes. For example, a monohull with a 24-degree deadrise at the transom is the design with the most potential to roll; more so than, say, a 20- or a 17-degree-deadrise hull, all things being equal.

The reason for this is simple. Deep-V monohulls have their deepest center of buoyancy at the keel, and the hull is less buoyant at the chines, which often are flat or reversed to dampen roll. Each hull of a catamaran provides buoyancy closer to the beam ends of the boat, therefore causing a high degree of . . .

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