Analysis and Comparisons of Cruising Multihulls 2013.
Hull design. Why choose a DC 7, 8 and 9m over other catamarans? These lighter catamarans are designed with little rake on the stem, a very full forefoot and a full hull dead rise, this gives a catamaran hull the required full buoyancy forward all catamarans need when heading into weather, or they will slam on the bridge deck badly.
As one of the oldest hull shapes (imagine two logs tied together), catamarans occupy a small niche in America and larger niches in some other areas of the world. Using two hulls bridged by a deck, the catamaran design provides additional beam, increased stability and, at the same time, increased speed (the slim twin hulls have little drag).
Catamarans don’t sink. The general rule of thumb for catamaran goers is that if you have an emergency at sea, the best policy is to stay with your catamaran. If a catamaran is damaged, or in very few extreme cases actually flips, the vessel will float indefinitely (right side up or not).
The Hull Design. The twin hull design of our power catamaran produces a narrow footprint in the water when compared to a mono hull design. This provides increased rider cushion when planning out on rough seas and avoiding the “porpoise” effect that a mono hull experiences when running.
Catamaran hull speeds are very high due to several factors. The advantages of catamarans are great, resulting in fast speeds. Open bridgedeck catamaran hull speeds are not the limiting factor on speed, and many catamarans routinely exceed the hull speed calculation. Lightweight Catamaran hulls can be very speedy and efficient, traveling quickly even with low wind speed.
The controversy rages in dockside watering holes, tackle shops, and Internet chat rooms: Which rides better-a catamaran or a V-hull? So far, all the talk has been purely subjective: A cat feels like this, a V-hull feels like that. To us, that's useless. At Boating Magazine, we need hard numbers, things that we can quantify, then we'll decide.
Figure 1 Hull form of basis ship 3. SIMULATION 3.1 HULLFORM DESIGN The aim of the simulation is to investigate the wake wash generated by the asymmetric catamaran hull form. The simulation program used in this research is a commercial package of Computational Fluid Dynamic (CFD) software, SHIPFLOW version 2.8. The hull form of the asymmetric.