Team N

ew Z

ealand

Two B

oats or Not Tw

o Boats?

Tommy Robaina - Nicholas Holt - Brett DeRocker - Ronak Amin

Introduction – Design of a SailboatIntroduction – Design of a Sailboat

Background

• 1870 - Introduction of the American Cup (formerly known as The One Hundred Guinea Mug)

• Changes and Regulations– Sailboat length and mast size – Crew size

• Competition Structure– Two groups

• Defenders• Challengers

Background

Racing Objectives – How to win

• Weight of the sailboat– Drag factor

• Strength and stability– High winds and sea conditions

• Crew– Fitness/training as well as knowledge

Racing Objectives – How to Win

Testing Methods – A Comparison

Tank and Tunnel• Construction of ¼

scale sailboat model• Testing takes place in

a water tank/pool with use of towing device and wind tunnel

• Test analyzes performance characteristics

Computer Simulation• Use of computer software

to analyze performance characteristics

• Asks for specific input data to analyze and calculate performance output

• Tools– FEA– CFD– VPP

Testing Method – A Comparison

Computer Simulation Method

Advantage• Speed

– Creation time – Instant Results

• Cost effective in comparison to Tank and Tunnel

• Easy to compare alternative sailboat designs– Simple to enter alternative

parameters & receive results

• Eliminates the “Scale-up” problem

Disadvantages• Massive computing

memory needed• Physical prototype still

necessary for basic hull and keel design

• Not completely self sustainable; requires additional extensive knowledge

Computer Simulation Method

Team New Zealand

• Objectives– To win the Americas Cup in 1995

• Resources– Syndicate of 50 members• Management, Design and Construction

Crew, Sailing Crew

– 20 Million Dollar Budget– Beneficiary of Silicon Graphics

Corporation• Access to powerful computer technology

Team New Zealand

Dilemma Choices Faced by Team New Zealand

• Crafting of two boats of similar design at the same time

• Crafting of two boats of different design at the same time

• Craft one boat now, determine performance, and then based on that craft an additional

Dilemma

Recommended Solution

• Craft one boat now, determine performance, and then based on that craft an additional– Based case facts: this presents the most cost

effective scenario– Based on designer Doug Peterson’s previous

design success– Allocate to primary boat, test the

performance, then determine the success of the design as well determine alterations to be made to second boat

Q A