OK... would someone explain this to me? ...

[viking north]

Hakimknunker--agree 100%--My converted lifeboat motorsailers while built in the traditional style never ever gave me profitable returns mostly breakeven, which if taken from a buisness view is a loss. I did however enjoy the challenge of the builds and the enjoyment of their use which in my economic situation at the time i could never have afforded to do so. One might say it was profitable to the soul but not the pocket book. Non traditional experimentation is always extremely important in any field and even when success is achieved it often requires time and the thinning out of the old guard for acceptance. Modern catamaran development being a prime example and yes even this old guard has to admit i'm not as yet a true multihull fan.
As to this hull, from the last three posts it's looking even better as a Marco Polo conversion project.

[daiquiri]

Originally Posted by michael pierzga

Its a pupose built, light displacement, west coast, downwind speedster. a Bill Lee santa cruz type hull.
http://www.fastisfun.com/blboats/sc50brochure/sc50.htm

Santa Cruz has a nice shape, yes. Now, it could be just an optical effect due to a perspective view, but the photos shown in this thread show a very narrow boat, with rather straight waterlines. Doesn't look so alike to Santa Cruz to me, but I might be wrong here.
Cheers

[michael pierzga]

Definitely not a santa cruz. And at 16 tons ???? heavy.

The weird bow overhang might have been generated by a racing rule that measured waterline length. WHAT are the dimensions of a 12 Meter Americas cup yacht ? The 12 meters used that overhang forward.

[michael pierzga]

12m azzura by Valecelli and an 8 meter

What are the demensions of an 8 meter racing yacht

[sharpii2]

Originally Posted by ancient kayaker

I disagree; if it lifts the bow, or any other part of the boat, when off the lee beam, it would generate a moment counter to the heeling moment.

Intuitively - since I haven't figured out how to draw the force vector diagram - I suspect the sail can be set to produce zero heeling moment, although it may not be the most efficient from a driving point of view.

I have experimented with a related sail type, an equilateral triangular sail set symmetrically on a mast with two booms. The rig was mounted on the gunnel so it was offset from the centerline, and its peak was canted inwards. On a reach it was set with its leading edge more or less above the centerline of the hull, approximating a lateen, and it definitely reduced heeling moment, Since it was used on a kayak, not much stability and a small cockpit that did not permit hiking, that was essential.

I guess I'll have to concede. Experience beats the hell out of theory.

[ancient kayaker]

Gee, Bob, I win so few of these I feel guilty . . .