Original sales materials: iw_31_brochure.zip
The giant to-do list is now here.
http://www.dba.dk/31-fods-havkrydser/id-72263946/
http://smhavn.dk/con24.php4
http://iw31.blogspot.com
http://www.stormy-iw31.eu/7572/
http://www.stormy-iw31.eu/5881/
http://www.iw31.de/bilder/index.html
http://sy-juliette.de/
http://www.halse.de/
http://sparkmanstephens.blogspot.com/2011/02/design-1899-iw-31-class.html
http://mermaidscheveningen.webklik.nl/page/ontwerp
http://www.iw31-wismar.de/
http://www.iw31.dk/
http://www.iwrig.com/57718625
http://eskapad.wordpress.com/
http://mermaidscheveningen.webklik.nl/page/ontwerp
http://www.klassiekepolyesterjachten.nl/page/OverOns
http://sailboatdata.com/viewrecord.asp?class_id=5505
http://www.s-and-s-association.org/
http://www.sparkmanstephens.info/doc/5702458zUBmMLGktd9U2RAC4CT7yqTe9.pdf
http://www.hinnerk-weiler.de/
http://www.youtube.com/hinnerkWeiler
http://www.youtube.com/user/ottorino43 (commented on a video that he owns an IW 31)
http://www.youtube.com/user/essen222 (commented on a video that he owns an IW 31)
https://picasaweb.google.com/116970321897372292619/IW31Havskum#
http://www.faaborg-vaerft.dk/Faaborg_Vaerft_A/S osmosis treatment in DK
I'm not entirely certain I've put in the correct numbers for all the calculations correctly, but here are our general performance & stability numbers (from sailingcourse.com):