Join Date: Jul 2008
Location: S/V Waltzing Matilda, Port Ludlow, WA (NW Puget Sound)
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Rep Power: 8
Re: Full or fin keel?
My theoretical hull speed is 6.75kt, the most efficient speed of my engine (Vetus M4.15 33hp diesel) is 2000rpm. At 2000rpm w/16x9 prop I am doing 6.5kt using <0.4gph
6.5kt seems to be the "magic number" for my boat, it doesn't take much to get the boat to 6.5 under sail either.