CODE 56996 ACADEMIC YEAR 2017/2018 CREDITS 6 cfu anno 3 INGEGNERIA NAUTICA 8721 (L-9) - SCIENTIFIC DISCIPLINARY SECTOR ING-IND/01 LANGUAGE Italian TEACHING LOCATION SEMESTER 2° Semester OVERVIEW The course presents the fundamental knowledges about movement and behaviour at sea of monhull fixed keel sailing boats, in order to formulate and develop the design. AIMS AND CONTENT LEARNING OUTCOMES Develop the fundamental skills necessary to design sailing boats. AIMS AND LEARNING OUTCOMES Learning of the physical phenomena which govern the behaviour of the sailing boat; study of the techniques of experimentation and data acquisition (systematic series, wind tunnel, on board measures, etc); methods of design and performance prediction. TEACHING METHODS Frontal lessons SYLLABUS/CONTENT Design criteria Definition of main characteristics of the boat Definition of main dimensions – Statistical data and allotrope boats Approach to the hull design Principal softwares used for the development of the design The naval CADs The technical specification Rules CE Directive 2013/53/UE Meaning of design categories and navigation limits for “natanti” and “imbarcazioni” flying Italian flag Directives and harmonised rules Essential requirements Rules for the classifications of pleasure yachts with length Lh greater than 24 m The wind True and apparent wind Reaches and tacking Polar diagram of boat speeds Surfaces and foils suitable for generate control and power Fluid dynamic force: lift and drag Aerodynamic and hydrodynamic forces Equilibrium Equilibrium equations Centre of effort of the submerged part of hull and appendages, CRL Centre of effort of sails, CE Balance between centres of effort Lead of the sail Balance of the rudder Stability Transversal and longitudinal stability at little angles Dellenbaugh angle and rolling period Curve of the righting arms Righting moment in waves Stability criteria for boats (LH ≤ 24 m) according with european rule ISO 12217-2 Stability criteria for ships (LH > 24 m) according with The Large Commercial Yacht Code (LY3) Resistance to the motion of the hull Viscous drag Wave resistance The Delft systematic series Heel resistance Added resistance Power of the auxiliary engine Resistance of the propeller in sail navigation The appendages: keel and rudder Flow around a wing Prandtl’s lifting line theory Lift and induced resistance of the boat Winged keels Canard wings Tandem keels Canting keels Gerritsma e Keuning experiments about interaction between hull and keel Shape of the section of appendages Practical design of fins and rudders Advanced section design Choose of areas of keel and rudder Single and double rudders The sails The flow around the sail Shape of the sails Camber of the sail Mast interference Shape of the rigging Hazen’s model for the aerodynamic of sails and rigging Motive and lateral power Statistical parameters of sail plan Scantling of mast and rigging Forces on the shrouds Forces on stays Choose of cables for shrouds and stays Mast scantling – Nordic Boat Standard method Scantling of the boom Scantling of the spreaders Holes in the mast Skene’s method Components of mast and rigging Scantling of ballasted keel Fixed keel at 90° knockdown Longitudinal grounding Scantling of ballasted keel according to ISO 12215-9 Scantling of the rudder Scantling of the rudder according to ISO 12215-8 Scantling of deck fittings Loads on sheets and halyards The system of handling of fore sail The system of handling of main sail The winches Notes of fluid mechanic Bernoulli’s equation Effect of friction on flow schemes Circulation and Magnus effect The Flettner’s rotor Generation of lift by a wing Kutta-Joukowsky’s hypothesys The performance predition The performance predition softwares Calculus methodology of VPP On board plants Bilge plant Black and gray waters plant Fuel plant Fresh water plant GPL plant Appendixes (only for information, not included in the examination program) Types of sails and rigging Nomenclature Reaches and tacking The wind The waves RECOMMENDED READING/BIBLIOGRAPHY L.Larsson, R.Eliasson, M.Orych “Principles of Yacht Design”, 4a ed., International Marine / McGraw-Hill Education, 2014. C.A.Marchaj, “Aero-Idrodinamica della Vela”, Mursia, 1987 P. E. Liguori, “Le vele”, Hoepli, 2006 R. Garret, “Fisica della vela”, Zanichelli, 1994 I. H. Abbot, A. E. von Doehnoff, L. S. Stivers jr, “Summary of airfoil data”, NACA Offshore Racing Congress, “ORC VPP Documentation”, ORC 2017 TEACHERS AND EXAM BOARD PAOLO PONSICCHI Ricevimento: By appointment (e-mail ponsicchi@ponsicchi.it) Exam Board PAOLO PONSICCHI (President) DARIO BOOTE LESSONS LESSONS START Second half-year Class schedule The timetable for this course is available here: Portale EasyAcademy EXAMS EXAM DESCRIPTION Viva voce exam ASSESSMENT METHODS Registration by Aulaweb, mandatory at least three days before exam. Exam schedule Data appello Orario Luogo Degree type Note 18/01/2018 09:30 LA SPEZIA Orale 08/02/2018 09:30 LA SPEZIA Orale 14/06/2018 09:30 LA SPEZIA Orale 05/07/2018 09:30 LA SPEZIA Orale 13/09/2018 09:30 LA SPEZIA Orale
