# AERODYNAMICS OF SAILS

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iten
Last update 03/07/2020 16:04
Code
61220
2020/2021
CREDITS
6 credits during the 1st year of 9008 VESSEL & YACHT DESIGN (LM-12) LA SPEZIA
SCIENTIFIC DISCIPLINARY SECTOR
ING-IND/13
LANGUAGE
Italian (English on demand)
TEACHING LOCATION
LA SPEZIA (VESSEL & YACHT DESIGN)
semester
2° Semester
modules
This unit is a module of:
Teaching materials

## AIMS AND CONTENT

LEARNING OUTCOMES

The course proposes the physical and aerodynamic modeling of the sail propulsion and the sailing boat modeling. General principles of Physics and Fluid-dynamics are presented, giving also a correlation with sail materials and techniques for sails construction.

AIMS AND LEARNING OUTCOMES

The purpose of the module is to provide the general concepts of the fluid dynamic interaction of a sailing vessel in order to present the operating principle of a sailing boat.

The fundamental concepts of fluid dynamics are introduced and then analyzed in greater detail in the specific application of aerodynamics and hydrodynamics so that the student can make design choices justified by the physics of the problem.

The notions of hydrostatics allow the student to design a stable and safe boat.

The hydrodynamic modeling will allow you to make design choices for the sizing of the appendages as well as determine the performance of the boat.

The aerodynamic modeling defines the aerodynamic actions on the sail plan and allows to correctly dimension the sail plan.

At the end of the course, the student will be able to evaluate the performance of a boat, evaluating the correct weight distribution and the sizing of all surfaces hit by the wind or immersed in water.

Teaching methods

Theoretical lessons on the course topics by means of the slide show.

Practical exercises for the evaluation of the static balance of the boat and the evaluation of the hydrodynamic and aerodynamic forces using Excel, Rhinoceros, Orca3D (or similar) software.

SYLLABUS/CONTENT

• Fundamentals of the operation of the sailing vessel

• ​Fundamentals of fluid dynamics and mechanics

• Elements of hydrostatics and stability

• Hull hydrodynamics and modeling of hydrodynamic forces

• Hydrodynamics of the appendices

• Aerodynamics of the sail

• The balance under sail and the performance of the boat

• Sail plan and deck plan

• Main maneuvers and equipment

• Sail plan and sailing plan dimension

Fabio Fossati – Teoria dello yacht a vela – Polipress

Fabio Fossati - Aero-hydrodynamics and the Performance of Sailing Yachts - Adlard Coles Nautical

Course slides and computer material provided in the classroom

## TEACHERS AND EXAM BOARD

Ricevimento: I can be contacted to make an appointment at the following email address: paolo.schito@polimi.it

Exam Board

PAOLO SCHITO (President)

GIUSEPPE SALA (President)

ANDREA RATTI (President)

LUCA ANGELO DI LANDRO (President)

## LESSONS

Teaching methods

Theoretical lessons on the course topics by means of the slide show.

Practical exercises for the evaluation of the static balance of the boat and the evaluation of the hydrodynamic and aerodynamic forces using Excel, Rhinoceros, Orca3D (or similar) software.

LESSONS START

The beginning of the lessons is coordinated with the other modules of the laboratory and on the basis of the calendar of workshops and intensive courses provided during the year.

ORARI

L'orario di tutti gli insegnamenti è consultabile su EasyAcademy.

## EXAMS

Exam description

First part: delivery of the ship weight list and static balance.

Second part: discussion of the boat's design and related sizing choices of the sail plan and appendices with references to theoretical concepts seen during the course.

Assessment methods

Written + oral