Catamaran hull speeds are very high due to several factors.

High speed catamaran hull design. Doing research on fast efficient hull shapes for a 25 cruising catamaran capable of 2225 knots cruise and 30 knots top speed while still providing reasonable performance at lower speeds I found the following. Feb 3 2020 - Explore Keith A Daviss board Catamaran Hull Design on Pinterest. See more ideas about catamaran boat design boat plans.

Higher speeds compared to equivalent power from diesels. For example the HFR of a 100 luxury catamaran may be 121 providing it with a high speed potential. This is a measure of the fullness of the ends of the hull.

Motoring range in nautical miles R m 600 A diesel engine consume on half throttle approximately. 1 Efficient planning shape foil assistedCorsair 22 Foiler. An 8m catamaran fitted with 2 x 75hp diesels will weigh at least 45 tons with just 33hp per ton giving a top speed of around 12 knots.

Even when not planing they will travel much faster than what the hull speed formula. But only in the higher speed. Effects of design parameters such as deadrise angle cross-section shape length-to-beam ratio forefoot contour etc.

I have given this design the acronym SPEED standing for Small Power Extended Efficiency Displacement. Giving 50hp per ton with a top speed of around 23 knots. The engine power needed for the catamaran is typically 4 kWtonne and the motoring speed is near the hull speed.

The question of whether to make catamaran hulls symmetrical or asymmetrical can be argued both ways. Half overall beam half hull beam racing cat Stars and Stripes had a 161 HFR. The most important catamaran design hull shape factor is the Prismatic Coefficient Cp.