From what I have read 35 to 50% is very optimistic. Probably closer to 15 to 20%. Just going by what Iv'e read though. I hear a steadying sail is considerably more effective.
For hauling just put "Lift Here" in the appropraite places next time you're hauled. I keep forgetting to do that. Would definitely not want a lifting strap over the fin.
Must be the tryptophan, but has anybody used daggerboards in a trawler?
Yes, in a long skinny boat cruiser, not trawler. Avard Fuller, Chair of Fuller Brush and a tinkerer. 61 foot narrow boat that he cruised with his family for quite some time. Tad Roberts has a bit about it. It was featured in some magazines of the day.
Lightweight Motoryachts: Arielle, Marin, Marco Polo, Herreshoff,Jim Hawkins, Avard Fuller,Little Goose,William Garden
Murray I would think that a single dagger board DB would be located best if it came right up through the engine or trans. Get far from CG and some strange motions could result.
can you elaborate on the tank you plan to use?
Mako, I like your buttock line.
Looks like the PC is lower aft than fwd. could it be considered a fish form hull?