Catamaran hulls have a lower resistance when passing through water.

Catamaran hull resistance. 1 20. C p D A m L WL. Catamarans reduce drag by making use of a very thin and pointed hull design.

134 1992 pp. Primary hull construction is resin-infused vinylester with a balsa cored hull and deck. This comparison is based on two existing boats of very similar dimensions including length and horsepower that have been tested in New Zealand over the measured nautical mile by Len Gilbert of Diesel Craft Evaluations who use a computerised fuel metering system.

This catamaran is the working boat whose speed is about 8 knots. Lower values 057 are optimized to displacement speeds and higher values 060 to speeds over the hull speed hull speed. But there still lies a conspiracy about the resistance.

Right it is the strange hull. It is the most sophisticated shape I draw and takes the longest to build. Consequently catamarans show poor performance at low speeds Fn 035 where skin friction is predominant.

An investigation into the resistance components of high speed displacement catamarans. Catamaran resistance is very complex compared to monohull resistance so it is particularly worthy of research. High freeboard assures a dry ride.

Typically modern catamaran designs have sharp bows to drive the vessel through the seas with as little wave making as possible. Because of this hull i can not find the suitable method to calculate resistance. This is the rocker line isolated from the lines plan above in blue and and the red line shows a more moderate rocker line that achieves the same buoyancy and maintains the centre of buoyancy in the same position.