Its a given that catamarans are more sensitive to weight and loading than monohulls.

Catamaran hull weight. Hull 1m x 1m x 2760kgm3 x 10mm 2760 kgm2 Keel 1m x 1m x 2760kgm3 x 20mm 5520 kgm2 Sup 1m x 1m x 2760kgm3 x 7mm 1932 kgm2 This means that the estimated weights are besed on the following thickness for a gamma aluminum 2760 kgm3 Hull 10 mm Keel 20 mm Sup 7 mm OK. The secret is in the tunnel. The underwater characteristics of a vessel are responsible for allowing a multihull and its cargo to travel through the water.

The innovative catamaran hull did indeed show exceptionally good results at shallow water depths. Catamarans reduce drag by making use of a very thin and pointed hull design. 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.

You have to be a good laminator and use a lightweight foam panel to get anywhere near that weight using grp while a 14in thick solid grp hull would only be used on boats over 35ft long. The weight tells us the volume of hull we need to put below the datum waterline or the designed waterline. He has a lot to say on the subject of catamaran hull design.

Length sail area and weight. Agility may get you off a lee shore or help you manoeuvre smartly in tight circumstances. The general rule is that in terms of sailing cats vs monohull sailboats a cat of equal length can typically go faster than a sailboat.

Customers are often told that catamarans have a history of bad performance in a head sea making the ride uncomfortable or even dangerous. Hulls that are as narrow as possible to carry the weight will reward operators with great economy and a great ride. Catamaran hulls can be designed as planing or displacement hulls but they are not slowed nearly as much by the drag barrier.

Catamarans are also very light which further reduces drag and displacement. Powering While the lengthbeam ratio of catamaran LBRC is between 22 and 32 a catamaran can be certified to A category if SF 40 000 and to B category if SF 15 000. Catamaran builders strive to build the lightest boats they can without sacrificing strength and stiffness and have adapted new building techniques and materials to meet this target.