The 18 Square is a development class boat. Max 18 square meters of sail (hence the name) in any configuration, although most were unirigged for efficiency. Max 5.5 meters (ca.18 ft) length. No maximum or minimum beam. If boat weighs less than 330 lb, category 1, if more than, category 2 (different ratings)
Link to pic under sail, with old sail which has been replaced with aforementioned Glaser/Ullman
http://www.flickr.com/photos/tamishel/3025261789/
Yellow boat in b'ground, Glaser/Ullman sail
http://www.osyc.com/galle…nloadItem&g2_itemId=2187
The tilt rig is here at thebeachcats (pics are Tilley's personal trailer, I have the 2d prototype)
http://thebeachcats.com/pictures/?g2_itemId=11313
I loved and still love my boat, but I am taken up with the trimaran and Miz Vileine is lonely. She's always taken good care of me, she's a good boat