BOOTE D.

The Italian Classification Society, RINA S.p.A., is developing a new set of Rules regarding comfort conditions on board large motor-yachts. According to present owner requirements and technical enhancement, the new limit values will be more restrictive especially for yachts with more than 65 meter in length. In this perspective designers and...

From the commercial point of view the aesthetics of large luxury yachts has the same importance of their technical performances and reliability. In this perspective the first impact that a new construction can exert on a potential owner takes place through the overall appearance of the hull and superstructures. The hull colour, in particular,...

Most damages to structural components of ships are due to fatigue phenomena. Particular care should then be devoted to fatigue evaluation since the first phases of any ship project. All main Classification Societies have in their Rules simplified procedures for fatigue evaluation, in order to make all designers able to perform structure...

At the end of structure assembling sides of yacht hulls are usually affected by bump and hollows coming from welding plates each other and plates to frames. This defect, normally tolerated on merchant ships, cannot be accepted on yachts for which the external surface must be smooth and glossy. In case of GRP vessels surface finishing comes from...

The future of transportation means is quickly moving towards green solutions in order to reduce the emission of COx and SOx firstly and, secondly, to progressively abandon the fossil fuels. In this perspective, alternative propulsion such as fully electric engine, biofuels, hydrogen, LNG are now largely used in the automotive field and for mass...

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Yacht manufactory industries have been faced with two different trends over the last few years: on the one hand, the current economic crisis, which has halted the production of super and mega yachts, and on the other, the increase in the dimensions of both sailing and motor yachts. In the case of sailing yachts, this trend has brought about a...

Dismasting is one of the most serious hazards for sailing boats. This event is mainly due to structural defects, poor maintenance or adverse weather conditions. For what the last aspect is concerned, it may be associated to two types of loads: the direct action of the wind on sails and accelerations caused by ship motions. The aim of this paper...

In order to convert the "one-off" construction of light alloy fast boats to a more efficient series production, the project of a 25-meter patrol boat, originally built in aluminum, has been completely reviewed, focusing on the structure design in composite material. As one of the most important targets of the new project is to further increase...

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