Catamaran sailboats are common but catamaran ferry designs are quickly growing in popularity due to their unique advantages.

Catamaran hull characteristics. When compared to a monohull yacht of the same size the catamaran hull has several big advantages. Catamaran hulls have a lower resistance when passing through water. Schionning Designs use three hull types for our range of power catamarans each with different design and performance characteristics.

Unlike monohulls that rely on a heavy lead keel to keep it upright a catamaran relies on the beam of the boat and the buoyancy of the hulls for stability. The Prismatic Coefficient Cp is a measure of the fullness of the ends of a boat the higher the number the fatter the ends and - surprisingly - the more efficient at high speeds. Prowler Semi-displacement Prowler VT.

A catamaran hull is one having either dual hulls or a main hull and secondary hull three hulls is a trimaran. Dry and naked The ProKat version is up to about 2000 but of course it is configured for twins. Teknicrafts unique hull shape designed for low resistance and soft riding.

It is however interesting to note that from the formula the effect of heel resistance increases with the square of the Froude number. Wide hulls and a large overall beam will increase the overall righting moment of a catamaran. Table 51 depicts the hull form parameters of the NPL series 4b hull.

The most obvious characteristic of a catamaran is the twin hull but there are more benefits to the cleverly crafted underside. Finer hulls are more efficient at high speeds but as weve just seen suffer from more WSA and so for normal cruising catamarans in average conditions a ratio of 111 - 131 seems optimum. A word of caution.

Typically cruising catamarans will have a beam to length ratio of roughly 50. It is a full planing hull. Teknicraft designed vessels are known for.