How to Build a Small Wind Turbine

At a glance..

These plans describe how to build two sizes of machine. The diameter of the larger wind-rotor is 8 feet [2.4 m]. The smaller machine has 4' diameter [1.2 m].

The details..

In 'How to Build a Wind Turbine', author Hugh Piggott offers readers comprehensive plans for constructing their own wind turbines. This guide includes instructions for building two different sized machines - one with an 8-foot diameter rotor, and another with a 4-foot diameter rotor. Additionally, the book outlines how to create permanent magnet alternators that can be wired for either 12-, 24- or 48-volt battery charging.

Piggot's design is unique in that it requires no gears or laminations in the alternator which reduces power losses during low winds while also allowing the machine to start producing useful energy from very low speeds. The large machine contains twenty-four neodymium magnets making it exceptionally powerful capable of providing up to five hundred watts under normal circumstances but over one thousand watts when pushed beyond its limits.

The book goes into great detail about blade theory including information on blade power, speed number shape as well as step-by-step guides on carving wooden blades by hand using basic tools such as saws chisels gouges etc. For those who prefer not working with wood there are also tips provided regarding molded fiberglass blades suitable for batch production.

Finally this guide explains everything you need know about creating your own furling tail system which prevents overload during high winds ensuring longevity of both your turbine and batteries connected through built-in rectifiers converting electrical output directly into DC ready-to-use voltage.