A must see site for anyone interested in wind turbines. Among the very best sites. http://www.scoraigwind.com/ ________ Utterly superb blade design paper. http://www.scoraigwind.com/wpNotes/bladeDesign.pdf Referenced from here http://www.scoraigwind.com/wpNotes/index.htm ________________ Warwick Wind Trial December 2007 report "Early days", but some fairly damning results. http://www.warwickwindtrials.org.uk/resources/Warwick+Wind+Trial+December+2007.pdf ____________ SWIFT: For those interested in and/or doubtful about the "Swift" wind turbines see his comments (and photos) on the above page. Also note his comments on urban windspeeds - which he says are in reality typically half the DTI / NOABL suggested speeds = 1/8 the power expected. (as power scales as V^3). ______________________ FREE GUIDELINES: Here are not only upgraded BRE wind speed guides but also a free set of guidelines for contractors re design, supply, installation and commissioning of micropower systems. Brief but useful. http://www.redbooklive.com/filelibrary/MIS_3003_Draft__Micro_and_Small_Wind__030507.pdf ________________________ ________________________ Home grown African wind power http://www.renewableenergyworld.com/rea/news/story?id=51394 -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist