This is the same mill the Dans helped build at Hugh's seminar on Guemes Island, WA, April 2003. 8-foot diameter, dual-magnet-rotor machine, with details on building the 4-foot version too. Nicely detailed and dimensioned CAD drawings, charts, and photos. All the information, details and measurements you need to build an axial-flux wind turbine. Hugh's focus is on slow, gentle, heavy and reliable machines that stand up to extreme conditions.
http://www.wondermagnets.com/cgi-bin/edatcat/WMSstore.pl?user_action=detail&catalogno=1502