Re: Interesting Sailboats
"Problem of the modern racer-cruisers is that they are weight sensitive. Add 10% displacement and, instead at 15K the yacht will start to plane at only 20 knots of wind. However, this is true only if a gennaker is used."
First quote that addresses weight sensitiveness in 319 pages or a long time. I wonder if 10% displacement should be a rule of thumb for testing the performance cruisers we so much enjoy to learn about. These boats are generally tested empty. Having said that, what is the ideal payload (persons, gear and consumables) and added displacement (installed equipment) of a cruising couple or family of four, and how it should affect, say, a Dufour 36P (6,400kg), an Elan 350 (5,350kg) or a J111 (4,216kg). Added displacement being equal, will it negatively affect more a lighter boat than a same length heavier boat? Or does it mean the contrary, that saving weight on the boat per-se leaves more "room" for crew, gear, consumables and fixed equipment? Are cruisers throwing away money at lighter boats?
In my boat, I used the one design crew weight limit of 748kg as a guide and have ended up with approx. 1000kg, all-in. This equals (a whopping) 21% of empty displacement. (Ok, I carry too much, but 500 of those kg are in water and batteries!).
So I keep wondering about all these super-performers, especially the recent wide stern shapes for downwind planing and if we should be making an observation on cruising added displacement and how different hull shapes "cope" with it. Just a thought.
Last edited by HMoll; 11-05-2012 at 07:42 AM.