Two separate one day workshops (10.00-17.00 Saturday and Sunday 1 & 2 September) led by Daniel Connell, renewable energy and open source technology designer. 
The workshops will demonstrate how to build a simple, low cost vertical axis wind turbine using £20-30 worth of easily sourced local recycled materials and basic hand tools. No previous experience is necessary.
The turbine is powerful, rooftop-scale, sturdy, safe, quiet, and efficient. At the end of the day we'll be attaching the turbine to a generator, and information will be provided on how to mount everything and attach applications for producing electricity, irrigation, air-conditioning, refrigeration, and other uses.
The build process, with details on materials and tools, is documented in full here. 
The day will also include a presentation and discussion on off-grid living, low-tech alternative infrastructure, open source hardware, and my recent building projects through India and Guatemala.
All tools and materials are provided. We will be making one three-vane turbine per workshop, which will then be donated to a local community project.
Cost is £80 per person, or £70 each if you bring an additional person, with a 10% discount for students, retirees and the unwaged.
Twelve places are available per day, so booking is essential. Contact Daniel Connell: daniel@opensourcelowtech.org to book