TABLE OF CONTENTS  
Author's Note                 6
Foreword                       10                        
by Robert Redford                            
1 Introduction                       12
The Uses of Wind Power                       
Energy Budgets                               
Wind Resources                              
System Design                                
2 Wind Power Systems                24
A Sail-Wing Water-Pumper                     
The Old Farm Water-Pumper                    
Wind-Electric  Systems                       
Evolution of a Wind-Electric System      
Low-Voltage Technology                      
A Unique Darrieus Water Pumper                
The Tvind System                              
University of Massachusetts Wind Furnace
3 Wind Energy Resources                 44
Global Wind Circulation
Windspeed Characteristics
Measuring the Windspeed
Wind Direction
Wind Shear
Turbulence
Site Survey
Anemometers and Recorders
Site Analysis
4 Wind Machine Fundamentals             66
Wind Machine Characteristics
Wind Machine Performance
Types of Machines
Savonius Rotor
Darrieus Rotor
How a Darrieus Works
Multiblade Farm Windmills
High-Speed Rotors
Enhanced-Performance Machines
Choosing a Suitable Wind Machine
5 Wind Machine Design             90
Aerodynamic Design
Savonius Rotor Design
Propeller-Type Rotor Design
Darrieus Rotor Design
Structural Design
Blade Loads                                
Blade Construction                          
Flutter and Fatique                         
Governor Design                             
Yaw Control
Shut-Off Controls
6 Building a Wind Power System         118
Water-Pumping Systems
Water Storage
Designing Water-Pumping-Systems
Wind-Electric Systems
Generators and Transmissions
Storage Devices
Inverters
Designing Wind-Electric Systems
Wind-Electric Water Pumps
Wind Furnaces
Installation
Lightning Protection
Comments From the Real World
7 Perspectives                      148
Wind Power Economics
Legal Issues
Social Issues
Appendix                       156
1 Numerical Data
2 Climatic Data
3 Design Data
Bibliography                       237
Glossary                      242
Index                        246