interesting speed chart at

http://www.multi23.com/POLAIRES_MULTI_23/Polaires.html

very similar to the one hobie have for the hobie 20 in the hobie university pdf download

http://www.hobieclass.com/default.asp?Page=1686

but the multi 23 one doesn't seem to say what the wind speed is, is 10 the standard and the big advantage it has due to spin?

eric e
1982 nacra 5.2 - 2158
2009 weta tri - 294