Windpower Workshop Book

	The author	3
	Foreword	6
Chapter 1	A Wild Resource	8
	The wind: a wild resource	8
	No free lunch	9
	The environmental cost	10
	How much power can you expect?	11
	Efficiency: where does the energy go?	13
	Design basics	16
	Summary	20
Chapter 2	Safety	21
	Electrical safety	21
	Protection against fire	21
	Protection against shock	23
	Battery hazards	26
	Other responsibilities	27
Chapter 3	Rotor Design	30
	Betz Revisited	30
	Using lift and drag	33
	Blade design	38
	Upwind, downwind or vertical axis	42
	Conclusion	47
Chapter 4	Blade Making	48
	A word of warning	48
	Blade weight	49
	Blade materials	49
	How to carve a set of rotor blades	50
	Painting and balancing the blades	60
Chapter 5	Generators	63
	What to look for	63
	How generators work	64
	Changing the speed of generators	78
	Types of generator	79
	Motors used as generators	84
	Building a permanent magnet alternator from scrap	86
	Design hints	92
	In conclusion	95
Chapter 6	Mechanical Controls	96
	Facing into the wind	97
	Avoiding overload	99
	Turning away from the wind	101
	Shut down systems	105
Chapter 7	Electrical Controls	109
	Load control: the key to good performance	109
	Heating systems	110
	What batteries like best	115
Chapter 8	Towers	120
	Types of tower	120
	How strong is strong enough?	120
	Erection	121
	Hands-on tower erection	123
	Guy materials	125
	Anchors	128
	Hints for safe erection of tilt-up towers	134
	So we come to the end	137
	Glossary	139
	Windpower Equations	146
	Worked Examples	148
	Access Details	153
	Index	157