Developed with the Cossutti studio and the ICAD research consortium, “Belladonna“ is the sum of years of work and research in the top-level racer section, including Querida, Monami, and QQ7. It also brings together the many studies and IMS optimisations carried out by the Cossutti studio on winning craft.
The project continues along the lines drawn out with the range of Vismara 40 IMS racer-cruisers: a philosophy that seeks the maximum competitiveness for racing and exploitation of IMS regulations, on craft with a sporting-cruising future. The project therefore followed two lines of development, almost as if dealing with two separate boats: hydrodynamic research and optimised rating parameters, as for a pure racer and the integration of structures/ furnishings to be able to create a roomy, comfortable interior without any adverse effect on weight. The hull lines are the state-of-theart for IMS 2004 regulations, with high rakes on the water, deep U sections, vertical sides and buttocks with very tight diagonals. The classical setup for the current IMS is completed by: the sail plan with low overlap jib, a very large mainsail, high extending appendages without end bulb and a high concentration of weights with the ballast sunken in the bilge. The ICAD consortium’s contribution, using the powerful Computational Fluid Dynamics (CFD) software available, has allowed us to improve hull line analysis, considering the “free surface” effect which is not taken into account by either VPP or IMS software. The appendages too have been logically studied using CFD to develop aerofoils that, to win this rating, have a greater wetted surface but which, create less resistance to forward movement, thanks to laminar flow. The necessary integration of structure and fittings, plus the desire to create an elegant style both on deck and for the interiors, are based on the brand new Vismara 45’ Open “Margherita“.
The interiors are perfectly symmetrical, with two cabins in the stern and a central bathroom that is fully integrated into the module containing the engine room and the entrance stairway, thereby providing maximum weight concentration. The bulwark galley and course plotting table area are opposite one another. There is a large dinette with central table and fore, a sail locker with 2 additional berths. A specific feature of the design is the fact that even interior areas can be converted, given the wardrobe closure system, which become doors for the cabins, fore and aft, making it possible to create open-plan areas that work to the benefit of sail-change operations during races and to restore the partitions and space divisions while cruising. The structural function of the furnishing has logically led to the use of compounds with a stylish quality and therefore, many parts of the boat have been left in exposed carbon, while the rest has been carefully painted with special thickness paints. A great deal of care and attention has gone into graphics and the styling of all details to keep the “family feeling” with other projects and continuing in this way, to create a small series.
