# OFFSHORE RACING CONGRESS

Save this PDF as:

Size: px
Start display at page:

## Transcription

1 World Leader in Rating Technology OFFSHORE RACING CONGRESS ORC Speed Guide Explanation

4 6. POLAR DATA The polar graphics in the Speed Guide are constructed from the data listed at the end of the Speed Guide as tables of numbers. This polar data is included in the Speed Guide package in SYLK (slk) format. This file can be opened using popular spreadsheet software (such as Microsoft Excel) for further processing or conversion to a different format, suitable for uploading on the boat's instruments or navigation software. Check the requirements of your navigation software for which file type and in what specific order the data may need to be edited to operate with this software.

5 Appendix A - MATHEMATICAL RELATIONS For mathematical conversion of apparent wind to true wind and vice versa, use the following formulae: True Wind conditions given Apparent Wind conditions: 2 VTW = [VAW sin(baw)] [VAW cos(baw) V ] VAW sin(baw) BTW = arc tan[ ] VAW cos(baw) V boat Apparent Wind conditions given True Wind conditions: 2 VAW = [VTW sin(btw)] [VTW cos(btw) V ] VTW sin(btw) VTW cos(btw) V boat BAW = arc tan [ ] Add 180 degrees to BTW or BAW if it is negative. VTW is the velocity of the true wind. VAW is the velocity of the apparent wind. BTW is the bearing of the true wind. BAW is the bearing of the apparent wind. V boat is the velocity of the boat. Note: Wind reading is assumed to be sensed at 10 meters (33 ) above water see Appendix C: CORRECTIONS of INSTRUMENT READINGS) While it may be impractical to use calculators while racing, and many instrument systems have the capability to calculate and display these figures, there will be some utility in becoming familiar with these formulae to get at least a qualitative understanding of how these parameters are related. For example, more than one skipper after sailing a long spinnaker leg is lulled into a feeling of light air only to discover, on rounding up to windward at the mark, that he has hoisted a jib too large for the beat. Or he may have resisted the tendency to underestimate the wind strength and has over-compensated. It is relatively easy to calculate the True Wind Speed and from this to calculate the Apparent Wind over the deck for the upcoming beat. This permits selecting the jib that is just right for the conditions. So for example, suppose we are sailing towards the leeward mark at 6 knots with the apparent wind from 150 at 6 knots. This gives a true wind speed of o 2 o 2 VTW = [6 sin(150 ) [6 cos(150 ) 6] = 11.6 knots. For making the calculation of apparent wind angle upwind it is necessary to estimate the speed through the water on the beat. The polar diagram can provide this needed information. Suppose the optimum tacking angle is 40 and the 12-knot true wind polar curve shows a boat speed of 6.3 knots at 40. The apparent wind over the deck will be: o 2 o 2 VAW = [11.6 sin(40 ) [11.6 cos(40 ) 6.3] = 16.9 knots. boat boat 2 2

6 AERO FORCE MODEL HYDRO FORCE MODEL Appendix B - VELOCITY PREDICTION PROGRAM (VPP) The computer program that produces polar diagrams consists of two parts: the LPP (Lines Processing Program) and the VPP (Velocity Prediction Program). The LPP calculates hydrostatic data, like wetted surface, displacement and stability. These are necessary inputs for the VPP program which creates a computer simulation of the boat s performance based on scientific research of boat hulls in hydrodynamic basins, sails in aerodynamic tunnels and measurements taken on real boats. Hull resistance is calculated in sailing trim with the total crew weight and equipment onboard for various angles of inclination and wind strength. Forces that propel and heel the boat are calculated for all possible combinations of sails, along with a choice of the optimal combination for the given conditions. At the speeds shown on the VPP data sheet, various factors of drag have been balanced against the driving force. The important thing to have in mind is that each factor contributes either to drive or to drag. There are no "speed producing" elements in the hull. Thus length, for example, is not a speed producer per se, but simply affects the drag differently under different sailing conditions. But drive (from the sails) and drag can be influenced in some degree by the way a boat is sailed. The figure below depicts the various contributing elements to the ORC VPP. For more detailed information on how the VPP works and why, consult the ORC VPP Doumentation text available online at Measurements Rig Dimensions Mast Height LP SPL etc. Lines Generation. & Inclining Test & In water measurements. SAILS Dimensions SailTypes Aerodynamic Forces Sail Type Specific Aerodynamic Coefficients. Sailing Conditions. Upwind and Downwind Sail Combinations. Lines Processing LPP WIND LIST True Wind Speeds COURSES Headings Performance Curve Scoring Polar Curve Performance Analysis

### DESIGN #374 Farr 40 With Masthead Spinnakers

DESIGN #374 Farr 40 With Masthead Spinnakers Farr Yacht Design, Ltd. Copyright June 26, 2006 P.O. Box 4964, Annapolis, MD 21403 USA Tel: (410) 267-0780 Fax: (410) 268-0553 E-mail: info@farrdesign.com DESCRIPTION

### DESIGN #354 Benetau First 40.7 Racing Version for Chantiers Beneteau

DESIGN #354 Benetau First 40.7 Racing Version for Chantiers Beneteau Farr Yacht Design, Ltd. Copyright May 3, 2001 P.O. Box 4964, Annapolis, MD 21403 USA Tel: (410) 267-0780 Fax: (410) 268-0553 E-mail:

### DESIGN #446 First 36.7-Cruising Keel for Chantiers Beneteau S.A.

DESIGN #446 First 36.7-Cruising Keel for Chantiers Beneteau S.A. Farr Yacht Design, Ltd. Copyright March 12, 2001 P.O. Box 4964, Annapolis, MD 21403 USA Tel: (410) 267-0780 Fax: (410) 268-0553 E-mail:

### PERFORMANCE PREDICTION

PERFORMANCE PREDICTION Design #622 First 35 with 2.3m Fin Keel For Chantiers Beneteau Farr Yacht Design, Ltd. Copyright May 7, 2012 PO Box 4964, Annapolis, MD 21403 USA Tel: +1 410 267 0780, Fax: +1 410

### DESIGN #543 Beneteau First 10R For Chantiers Beneteau Deep Keel with Bowsprit

DESIGN #543 Beneteau First 10R For Chantiers Beneteau Deep Keel with Bowsprit Farr Yacht Design, Ltd. Copyright July 29, 2005 P.O. Box 4964, Annapolis, MD 21403 USA Tel: (410) 267-0780 Fax: (410) 268-0553

### DESIGN #446 First 36.7-Racing Keel for Chantiers BeneteauS.A.

DESIGN #446 First 36.7-Racing Keel for Chantiers BeneteauS.A. Farr Yacht Design, Ltd. Copyright March 12, 2001 P.O. Box 4964, Annapolis, MD 21403 USA Tel: (410) 267-0780 Fax: (410) 268-0553 E-mail: info@farrdesign.com

### PERFORMANCE PREDICTION

PERFORMANCE PREDICTION First 40 Carbon Pack With Deep Fin Keel/ Carbon mast/ Asymmetric Spinnaker on Retractable Sprit For Chantiers Beneteau Farr Yacht Design, Ltd. Copyright July 22, 2014 PO Box 4964,

### THE 21 st CHESAPEAKE SAILING YACHT SYMPOSIUM ANNAPOLIS, MARYLAND, MARCH 2013

THE 21 st CHESAPEAKE SAILING YACHT SYMPOSIUM ANNAPOLIS, MARYLAND, MARCH 2013 A wind tunnel study of the interaction between two sailing yachts P.J. Richards, D.J. Le Pelley, D. Jowett, J. Little, O. Detlefsen

### Section V Sailing off the wind

Section V Sailing off the wind 1 Sail shapes and flow patterns - off the wind a) Principles When reaching, it is maximum thrust which is important, and here the leech ribbons come into their own. Fig.43a

### Now we get to the really fun part of cat sailing, but first you need to know about apparent wind.

Shelley Sailing Club Inc. Notes for informal catamaran training course, Alec Duncan, 14/3/2015 Part 4: Reaching and running Now we get to the really fun part of cat sailing, but first you need to know

### Melges 24 Sailing Guide

RACING GUIDES www.ullmansails.com Upwind Sailing Melges 24 Sailing Guide The Melges is most efficient when sailed as flat as possible. Excessive heel causes leeway which is slow. The skipper must work

### Setup &Tuning guide. Updated 1st February 07

Setup &Tuning guide Updated 1st February 07 Boat preparation Tape a piece of batten to the backstay ram with a calibrated scale drawn on it. This will allow you to reproduce the same backstay settings

### The Definite Guide to Optimist Trim

The Definite Guide to Optimist Trim by Martin Gahmberg & the WB-Sails team The purpose of this tuning guide is to help you trim your WB sail optimally by learning the effects of the controls: How to change

### Principles of Sailing

Principles of Sailing This is a PowerPoint set of charts presented by Demetri Telionis on March 21, 2015 at the Yacht Club of Hilton Head Island. The aim of this presentation was to help the audience understand

### HIGHLANDER TUNING GUIDE

HIGHLANDER TUNING GUIDE This document provides information on preparation, Quantum s sail tuning and technique, and other helpful tips to make sure you re ready to meet your challenge in today s competitive

TUNE YOUR SAILS FOR OUTRIGHT SPEED J/70 Tuning Guide Rev. R02 After countless hours sailing, testing and competing in the J/70 One Design, North Sails has updated our tuning notes and tips in an effort

### INTRODUCTION TO NETWORK WIND 3 MOUNTING THE UNIT 14 SELECTING THE DISPLAY MODE 5 ABBREVIATIONS AND DEFINITIONS 17

CONTENTS CONTENTS 1 INSTALLATION 14 GENERAL INTRODUCTION TO B&G NETWORK 2 SITING THE UNIT 14 INTRODUCTION TO NETWORK WIND 3 MOUNTING THE UNIT 14 EXAMPLE SYSTEMS USING NETWORK WIND 4 SPECIFICATION 16 SELECTING

### North Sails Seattle Thunderbird Tuning Guide

Page 1 of 6 North Sails Seattle Thunderbird Tuning Guide Introduction The following tuning guide is meant as a good starting point in setting up your boat. Since not all Thunderbirds are exactly alike

Navigation with Leeway Leeway, as we shall use the term, means how much a vessel is pushed downwind of its intended course when navigating in the presence of wind. To varying extents, knowledge of this

### GLOSSARY Of SAILING TERMS

GLOSSARY Of SAILING TERMS Aback With the wind on the wrong side of the sails. Abaft Behind an object in relation to the bow. Abeam At approximately right angles to the foreandaft line of the boat. Advantageous

### J/70 Tuning Guide. onedesign.com Follow North Sails on... For any question you may have on tuning your J/70 for speed, contact our experts:

Photo Paul Todd/OUTSIDE IMAGES For any question you may have on tuning your J/70 for speed, contact our experts: Ruairidh Scott 01329 443 430 ruairidh.scott@northsails.com Tim Healy 401-683-7997 tim.healy@northsails.com

### TUNE YOUR RIG FOR OUTRIGHT SPEED. J/88 Tuning Guide Solutions for today s sailors

TUNE YOUR RIG FOR OUTRIGHT SPEED 2 We hope you enjoy your J/88 Tuning Guide. North class representatives and personnel have invested a lot of time to make this guide as helpful as possible for you. Tuning

### Beneteau 36.7 Sail Development

Beneteau 36.7 Sail Development North Sails began working with the 36.7 as soon as the first boat was launched in 2001. Since then we have built inventories for several of the European boats, the first

### J/70 Tuning Guide. For any question you may have on tuning your J/70 for speed, contact our experts:

Photo Paul Todd/OUTSIDE IMAGES For any question you may have on tuning your J/70 for speed, contact our experts: Tim Healy 401-683-7997 tim.healy@northsails.com Will Welles 401-683-7997 will.welles@northsails.com

### Sail Trimming Guide for the Beneteau 40

INTERNATIONAL DESIGN AND TECHNICAL OFFICE Sail Trimming Guide for the Beneteau 40 October 2007 Neil Pryde Sails International 1681 Barnum Avenue Stratford, CONN 06614 Phone: 203-375-2626 Fax: 203-375-2627

### Section III Principles of design and aerodynamics

Section III Principles of design and aerodynamics 1 Principles of the Tasar rig a) Evolution The most significant advance in recent decades in the art of handling sailboats has been the use of tufts and

### Thank you for choosing a North Sails P Class Sail

North Sails New Zealand Pakenham St, Viaduct Basin PO Box 37419, Parnell Auckland, N.Z. Ph (09) 359 5999 Fax (09) 359 5995 Email derek@nz.northsails.com Web Site www.nz.northsails.com Thank you for choosing

### ORC Software Module for Performance Curve Calculation (PCS) Specifications

ORC Software Module for Performance Curve Calculation (PCS) Specifications 25/9/2014 Revised: 9/2/2015 Revised: 4/5/2018 This project addresses the problem of the absence of a single and unique way of

### ETCHELLS RIG SET UP FOR PC-M/PC+/BF MAIN, DC270/GM JIBS,.5oz VMG, FULL RADIAL and.5oz/.75oz BIRADIAL SPINNAKERS

ETCHELLS RIG SET UP FOR PC-M/PC+/BF MAIN, DC270/GM JIBS,.5oz VMG, FULL RADIAL and.5oz/.75oz BIRADIAL SPINNAKERS 1. MAST STEP Jan 2008 5.360mtrs measured from the transom/deck intersection to the aft edge

### NORTH SAILS FAST COURSE MAINSAIL

NORTH SAILS FAST COURSE MAINSAIL Contents: Introduction. Step 1 Set twist with mainsheet tension. Step 2 Set depth with mast bend and outhaul tension. Step 3 Set draft position with luff tension. Step

### BoatWorks. (An Illustrated Sailing Primer) Table of Contents: 1. Basic Sailing Terminology: Boat Related Wind Related Other key terms

BoatWorks (An Illustrated Sailing Primer) Table of Contents: 1. Basic Sailing Terminology: Boat Related Wind Related Other key terms 2. Sailing Basics: Points of Sail The Wind The Boat The Sails 3. Crew

### Sail Trimming Guide for the Beneteau 373

INTERNATIONAL DESIGN AND TECHNICAL OFFICE Sail Trimming Guide for the Beneteau 373 March 2004 Neil Pryde Sails International 354 Woodmont Road #18 Milford, CT 06460 Phone: 203-874-6984 Fax: 203-877-7014

### TUNE YOUR SAILS FOR OUTRIGHT SPEED. MC Scow Tuning Guide. Rev Q10

TUNE YOUR SAILS FOR OUTRIGHT SPEED Rev Q10 Sail Designs Z-MAX MAINSAIL The Z-MAX has proven to be a fantastic all around sail for all sailors. Simple to set up, easy to use and trim. This new sail has

### CONTROL SETUP WASZP Team 11/29/2016

CONTROL SETUP WASZP Team 11/29/2016 INTRO This guide will help you tune your WASZP for optimised stability and performance. It will run through a good base setting for the systems that control your flight,

### E Scow Racing and Rigging Manual

E Scow Racing and Rigging Manual Written by Mark Ehlers Editing and content revisions by Andrew Bartling Aspects of Sailing E Scows Crew weight should never exceed 675lbs. The target weight for 4 people

### Sail Chart Drafter for Deckman v.2

Sailing Performer present Sail Chart Drafter for Deckman v.2 This application has been made to help navigators and trimmers to find the right sail to use in a faster and easier way than ever. Sail Chart

### Welcome to the. National Twelve Owners Association. Dear National 12 sailor

Welcome to the National Twelve Owners Association Dear National 12 sailor Welcome to the National 12 Owners Association. The Association organises many events and activities during the year and I would

### INCLINOMETER DEVICE FOR SHIP STABILITY EVALUATION

Proceedings of COBEM 2009 Copyright 2009 by ABCM 20th International Congress of Mechanical Engineering November 15-20, 2009, Gramado, RS, Brazil INCLINOMETER DEVICE FOR SHIP STABILITY EVALUATION Helena

### CSC Learn to Sail Class

CSC Learn to Sail Class JUNE 2014 Pedram Leilabady LNYC Nomenclature Sailors Lingo! Direc@ons Ahead Astern 1 6/3/14 Main Parts Mainsail Jib Sails / Spars Head Mast Head Leech Luﬀ Leech Luﬀ Mainsail Clew

### Optimist Tuning Guide

Optimist Tuning Guide Sail Care: To help you re new racing sail stay in top condition as long as possible here is some tips - Try not to crease your sail, some creases can cause MIT tears in your sail

### SONATA YACHT ASSOCIATION OF VICTORIA INC. P.O. Box 6010, M.D.C. Doncaster, Victoria 3108

1 SCOPE SONATA YACHT ASSOCIATION OF VICTORIA INC. P.O. Box 6010, M.D.C. Doncaster, Victoria 3108 A.A. Registration No. A00107436 Visit us at www.sonatayacht.com SONATA CLASS RULES AND RESTRICTIONS These

### 2002 Tuning in a Vanguard 15

2002 Tuning in a Vanguard 15 If you are the kind of person that likes to roll up to the regatta an hour before the start, throw the mast up, select a catch-all shroud setting, and then just focus on getting

### APPLICATION NOTE: MARINE APPLICATIONS Trim, Roll and Leeway.

APPLICATION NOTE: MARINE APPLICATIONS Trim, Roll and Leeway. An Alternative VBOX Application Examples of Trim Angle effects Traditionally, the VBOX has been used by automotive markets but the wealth of

### Span. Windows Version 11.1 User Manual

Span Windows Version 11.1 User Manual Formation Design Systems Pty Ltd 1984 2005 License & Copyright Span Program 1987-2005 Formation Design Systems. Span is copyrighted and all rights are reserved. The

### Reliable Speed Prediction: Propulsion Analysis and a Calculation Example

Reliable Speed Prediction: Propulsion Analysis and a Calculation Example Donald M. MacPherson VP Technical Director HydroComp, Inc. ABSTRACT Speed prediction is more than just bare-hull resistance. Speed

### STABILITY OF MULTIHULLS Author: Jean Sans

STABILITY OF MULTIHULLS Author: Jean Sans (Translation of a paper dated 10/05/2006 by Simon Forbes) Introduction: The capsize of Multihulls requires a more exhaustive analysis than monohulls, even those

### Wind Light Moderate Heavy Speed 0-8 mph 9-17 mph 18 + mph

Hobie 20 Racing Setting - Compiled by Bob Mimlitch, Fleet 23, Dallas, TX Most of the information is from Bob Curry's articles in Catamaran Sailor published by Mary Wells. Wind Light Moderate Heavy Speed

### Introduction to Dinghy Sailing AYF - TL1 Course Notes

North Harbour Sailing Club Established 1948 Introduction to Dinghy Sailing AYF - TL1 Course Notes CONTENTS Introduction. Safety. Parts of the Boat. Rigging. Boat Handling. Leaving and Returning to Shore.

### How to set up and use DeWiggler Analyst

How to set up and use DeWiggler Analyst The most important mission of an instrument system is correctly reporting wind direction (see http://www.ockam.com/functrue.html). DeWiggler Analyst is an application

### %%% %%%%%%%%%%%(1",,3\$=3

%%%D13% 8")3%9\$0"4#/%:;;,//4A(" %%% %%%%%%%%%%%(1",,3\$=3 G43"0%H4#I3+ G43"0%D4/J1#3+.#\$=,3%K"\$-3&/'E,3%K"\$-3-% L%>',,6%

### How to Sail Fast : Rig Tuning - by Bob Sterne

How to Sail Fast : Rig Tuning - by Bob Sterne Bob Sterne is the Executive Secretary of the CRYA, and one of the top Radio Controlled Sailboat designers. He builds World Class boats and his sails are the

### THE INTERACTION BETWEEN SAILING YACHTS IN FLEET AND MATCH RACING SITUATIONS

THE INTERACTION BETWEEN SAILING YACHTS IN FLEET AND MATCH RACING SITUATIONS P.J. Richards, Yacht Research Unit, University of Auckland, New Zealand N. Aubin, École Navale, France D.J. Le Pelley, Yacht

### YACHTING Carry out basic sailing and seamanship activities as a crew member on a keel boat

1 of 5 level: 2 credit: 4 planned review date: October 2007 sub-field: purpose: entry information: accreditation option: moderation option: Outdoor Recreation People credited with this unit standard are

### Gerald D. Anderson. Education Technical Specialist

Gerald D. Anderson Education Technical Specialist The factors which influence selection of equipment for a liquid level control loop interact significantly. Analyses of these factors and their interactions

### Thanks to North Sails, who gave us these fast rigging tips.

Mast Step Mast Rake Thanks to North Sails, who gave us these fast rigging tips. Congratulations on your purchase of North Club 420 sails. We have worked hard to design and produce the fastest, easiest

### TUNE YOUR RIG FOR OUTRIGHT SPEED. Farr 30 Tuning Guide Solutions for today s sailors

1 TUNE YOUR RIG FOR OUTRIGHT SPEED 2 I ve done a LOT of sailing in the Farr 30. It s an exciting, yet simple boat to sail... quick in light air and certainly a handful in a breeze. The Farr 30 is a boat

### SOLUTIONS FOR TODAY S SAILORS. Tuning Guide 05/11 NORTH SAILS

SOLUTIONS FOR TODAY S SAILORS Tuning Guide 05/11 NORTH SAILS The Farr 40 One-Design is a modern Grand Prix-type yacht designed specifically for the fun-loving owner-driver. A highly competitive Offshore

### Multihull Preliminary Stability Estimates are Fairly Accurate

Multihull Design (Rev. A) 45 APPENDIX A ADDITIONAL NOTES ON MULTIHULL DESIGN MULTIHULL STABILITY NOTES Multihull stability is calculated using exactly the same method as described in Westlawn book 106,

### TUNE YOUR SAILS SPEED. Optimist Tuning Guide. Photo Wavelength

TUNE YOUR SAILS FOR OUTRIGHT SPEED Photo Wavelength PEAK / HEAD THROAT TACK CLEW THANK YOU for choosing North Sails for your Optimist. Whether you are just starting out in an Optimist you are an experienced

### Chelsea Yacht Club. Adult Sailing Program Course Description. Basic Keelboat

Chelsea Yacht Club Adult Sailing Program Course Description Basic Keelboat General Standard The Basic Keelboat graduate will have successfully demonstrated the ability to responsibly skipper and crew a

### E Using a spinnaker

1 595-560-E 2007-01-05 Using a spinnaker 2 Spinnaker sailing These instructions have been compiled with both the beginner and the experienced sailor in mind. Our aim has been to help the beginner to start

### GNX Wind. Owner s Manual

GNX Wind Owner s Manual February 2016 190-02003-00_0A All rights reserved. Under the copyright laws, this manual may not be copied, in whole or in part, without the written consent of Garmin. Garmin reserves

### Lake Norman Keelboat Council Performance Handicap Racing Fleet (PHRF) Rating Program

Lake Norman Keelboat Council Performance Handicap Racing Fleet (PHRF) Rating Program Introduction. Rating by performance handicap is a method of providing equitable time allowances for sailboats of different

### S0300-A6-MAN-010 CHAPTER 2 STABILITY

CHAPTER 2 STABILITY 2-1 INTRODUCTION This chapter discusses the stability of intact ships and how basic stability calculations are made. Definitions of the state of equilibrium and the quality of stability

### Wind. Section 9. Sea Breeze. Dead Air. Land Breeze. Dead Air. 9 Wind 69

9 69 Section 9 Apparent. The vector sum of the true wind and the wind created by the movement of the boat. direction and speed as they appear to an observer on a moving boat. Wake. Water surface turbulence

### Acceleration. Overview: Hold on! Debrief: Brief to cover:

Acceleration To improve acceleration of a start line How do we accelerate? Use of the 5 essentials Sails, trim, balance, centreboard, course made good Other aspects and issues Communication, other boats,

### NALSA REGULATIONS FOR RECORD ATTEMPTS

NALSA REGULATIONS FOR RECORD ATTEMPTS Revision 3 July 2010 Overview: These regulations have been updated for top speed attempts for landyachts, iceboats and other hard surface, wind powered craft including

### J/24 Tuning Guide. Before The Boat Hits The Water

J/24 Tuning Guide Haarstick Sailmakers have used our years of experience building and racing J/24 s to develop a FAST set of sails, geared for performance in a variety of conditions. Together with the

### DeWiggler. Get your calibrations under control

DeWiggler Get your calibrations under control DeWiggler Pro DeWiggler Pro comes aboard with a calibration professional. Calibrations are determined and set in real-time. When the calibrator leaves, Pro

### Optimal Weather Routing Using Ensemble Weather Forecasts

Optimal Weather Routing Using Ensemble Weather Forecasts Asher Treby Department of Engineering Science University of Auckland New Zealand Abstract In the United States and the United Kingdom it is commonplace

### COMMON MEASUREMENT PROBLEMS & SOLUTIONS JUNE 2011

COMMON MEASUREMENT PROBLEMS & SOLUTIONS JUNE 2011 The main measurement problems still found in the 470 Class are the incorrect positioning of the mainsail on the mast and boom with the associated stopper

### National Maritime Center

National Maritime Center Providing Credentials to Mariners (Sample Examination) Page 1 of 8 Choose the best answer to the following Multiple Choice Questions. 1. In illustration D001SL, what is the edge

### SAILING INSTRUCTIONS

High School Keelboat Invite Qualifier Regatta Chicago Yacht Club October 7, 2017 Belmont Harbor, Chicago, IL SAILING INSTRUCTIONS 1 RULES 1.1 The regatta will be governed by the rules as defined in The

### Reliability. Introduction, 163 Quantifying Reliability, 163. Finding the Probability of Functioning When Activated, 163

ste41912_ch04_123-175 3:16:06 01.29pm Page 163 SUPPLEMENT TO CHAPTER 4 Reliability LEARNING OBJECTIVES SUPPLEMENT OUTLINE After completing this supplement, you should be able to: 1 Define reliability.

### Basic Keelboat Sailing Standard (ASA 101)

Basic Keelboat Sailing Standard (ASA 101) Prerequisites: None General Description: Description: Demonstrated ability to skipper a sloop-rigged keelboat of approximately 20 to 27 feet in length by day in

### When you re racing in waves, this affects your tactics (i.e. the

David Dellenbaugh s SPEED &smarts The newsletter of how-to tips for racing sailors Jan/Feb 2010 The importance of playing waves According to my online dictionary, a wave is a disturbance on the surface

### A New Real-time Method for Sailboat Performance estimation based on Leeway Modeling

THE 21 ST CHESAPEAKE SAILING YACHT SYMPOSIUM ANNAPOLIS, MARYLAND, MARCH 2013 A New Real-time Method for Sailboat Performance estimation based on Leeway Modeling Ronan Douguet, Lab-STICC, Université de

### AN INVESTIGATION OF AERODYNAMIC FORCE MODELLING FOR IMS RULE USING WIND TUNNEL TECHNIQUES

AN INVESTIGATION OF AERODYNAMIC FORCE MODELLING FOR IMS RULE USING WIND TUNNEL TECHNIQUES Fabio Fossati 1, fabio.fossati@polimi.it Sara Muggiasca 2 Ignazio Maria Viola 3 ABSTRACT Aim of this paper is to

### 1 Tuning Platform Reseating Beam Pads Rudder alignment Noisy Foils Rig Tension...

Contents 1 Tuning... 2 1.1 Platform... 2 1.2 Reseating Beam Pads... 2 1.3 Rudder alignment... 3 1.4 Noisy Foils... 3 1.5 Rig Tension... 4 1.6 Mast rake... 4 1.7 Spreader rake... 5 1.8 Diamond tension...

### SUBPART C - STRUCTURE

SUBPART C - STRUCTURE GENERAL CS 23.301 Loads (a) Strength requirements are specified in terms of limit loads (the maximum loads to be expected in service) and ultimate loads (limit loads multiplied by

### Long and flat or beamy and deep V-bottom An effective alternative to deep V-bottom

Boat dual chines and a narrow planing bottom with low deadrise Long and flat or beamy and deep V-bottom An effective alternative to deep V-bottom Here is a ground-breaking powerboat concept with high efficiency

### Viper 640 San Diego NOOD, Coronado YC Garth Reynolds

Viper 640 San Diego NOOD, Coronado YC Garth Reynolds garth@design.northsails.com Chris Snow and I were lucky enough to spend last weekend blasting around South Bay in Viper #175, a brand new Rondar Factory

### Setting up your FD to go sailing

Setting up your FD to go sailing The FD is a complex and powerful dinghy and getting the boat set up correctly for the prevailing conditions makes all the difference between the boat flying along and its

### Transportation Engineering - II Dr. Rajat Rastogi Department of Civil Engineering Indian Institute of Technology - Roorkee. Lecture - 35 Exit Taxiway

Transportation Engineering - II Dr. Rajat Rastogi Department of Civil Engineering Indian Institute of Technology - Roorkee Lecture - 35 Exit Taxiway Dear students, we are back with the lecture series of

### ADVANCED RACING EXAMPLE PROGRAMMES (All exercises used have been taken from the RYA Race Training Exercise Manual)

ADVANCED RACING EXAMPLE PROGRAMMES (All exercises used have been taken from the RYA Race Training Exercise Manual) The Key Principles for Each Section Starting Clear air Be on the line at the correct end

### Instruction Manual. Features. Specification: Length: 730mm Width: 500mm Height: 1000mm Sail Area: 0.15m 2. Weight: 692g (w/o battery & receiver)

AN UNBELIEVABLE SPEED MACHINE Instruction Manual Features Specification: Length: 730mm Width: 500mm Height: 1000mm Sail Area: 0.15m 2 Weight: 692g (w/o battery & receiver) Thank you for purchasing your

### MERIT 25 CLASS RULES ARIZONA YACHT CLUB ( AYC ) ONE-DESIGN FLEET. Effective January 1, 2006

MERIT 25 CLASS RULES ARIZONA YACHT CLUB ( AYC ) ONE-DESIGN FLEET Effective January 1, 2006 I. PURPOSE The purpose of these Rules is to maintain the one-design character of the Merit 25 while allowing for

### Raider 16/Sport - Spinnaker Rigging. Rigging Spinnaker

Rigging Spinnaker Step 1: Run the spinnaker halyard (minimum 52' in length) through the block then back down the mast. Step the mast as you normally would. Step 2: Temporally tie one end of the spinnaker

### Trim and Stabilisation systems NEXT GENERATION IN BOAT CONTROL.

Trim and Stabilisation systems NEXT GENERATION IN BOAT CONTROL www.humphree.com WHEN EFFICIENCY AND PERFORMANCE REALLY MATTERS! Humphree proudly presents the new HCS-5 The HCS-5 combines exceptional mechanical

### Date: 18th December 2001

Coaching Tips - J/24 Tuning Guide & Sail Trimming Written By: Stuart Jardine Date: 18th December 2001 Stuart Jardine, J/24 national champ five times over, tells you how to get the best results from your

### Wind tunnel tests of a non-typical stadium roof

Wind tunnel tests of a non-typical stadium roof G. Bosak 1, A. Flaga 1, R. Kłaput 1 and Ł. Flaga 1 1 Wind Engineering Laboratory, Cracow University of Technology, 31-864 Cracow, Poland. liwpk@windlab.pl

### Cathy Foster Coaching Session for the Datchet Flying Fifteen Fleet

Cathy Foster Coaching Session for the Datchet Flying Fifteen Fleet Cathy Foster ex Olympian and professional coach, came to Datchet Sailing Club today 11th August 2012. Six club boats rigged and ready

### Figure 1 Figure 1 shows the involved forces that must be taken into consideration for rudder design. Among the most widely known profiles, the most su

THE RUDDER starting from the requirements supplied by the customer, the designer must obtain the rudder's characteristics that satisfy such requirements. Subsequently, from such characteristics he must

### The OTSS System for Drift and Response Prediction of Damaged Ships

The OTSS System for Drift and Response Prediction of Damaged Ships Shoichi Hara 1, Kunihiro Hoshino 1,Kazuhiro Yukawa 1, Jun Hasegawa 1 Katsuji Tanizawa 1, Michio Ueno 1, Kenji Yamakawa 1 1 National Maritime

### Franckh-Kosmos Verlags-GmbH & Co. KG, Pfizerstr. 5-7, Stuttgart, Germany +49 (0) Thames & Kosmos, 301 Friendship St.

Franckh-Kosmos Verlags-GmbH & Co. KG, Pfizerstr. 5-7, 704 Stuttgart, Germany +49 (0) 7 29-0 www.kosmos.de Thames & Kosmos, 30 Friendship St., Providence, RI, 02903, USA -00-57-272 www.thamesandkosmos.com

### THE 21 st CHESAPEAKE SAILING YACHT SYMPOSIUM ANNAPOLIS, MARYLAND, MARCH 2013

THE 21 st CHESAPEAKE SAILING YACHT SYMPOSIUM ANNAPOLIS, MARYLAND, MARCH 2013 Mainsail Planform Optimization for IRC 52 Using Fluid Structure Interaction Dr. Robert Ranzenbach, Project Manager, USA Dave

### PERFORMANCE PREDICTION OF THE PLANING YACHT HULL

PERFORMANCE PREDICTION OF THE PLANING YACHT HULL L A le Clercq and D A Hudson, University of Southampton, UK SUMMARY The performance of racing yachts has increased significantly over the past 10-15 years

### A Different Approach to Teaching Engine-Out Glides

A ifferent Approach to Teaching Engine-Out Glides es Glatt, Ph., ATP/CFI-AI, AGI/IGI When student pilots begin to learn about emergency procedures, the concept of the engine-out glide is introduced. The