I'm with Paulo on this. If BS boats have a LPS of 125 degs then I would not call them "dangerously unstable"". I think with their single chine, high deadrise shape coupled with modest beam they will suffer for initial stability but I'd stick with my 125 to 130 degs estimate for LPS. But there is a caveat.
I'd love to know what a steel, welded mast weighs. I suspect it is at least double that of an alu stick. That can dramatically raise the VCG.
I was working on a 56'er. I came in one Monday morning and looked at the weight study file. The VCG was abnormally high. I knew something had gone wrong so I began going over the numbers. When I got to the rig section of the weight study I noticed that I had input the weight of the mast twice by accident. It was one of those mistakes that becomes a very usefull lesson.
What I am getting at is that if a BS boat has a welded steel mast the VCG could be 6" above the DWL and that would have a huge effect on stability. I really don't know BS boats very well, only from what I see in th pics posted. BS is extremely reluctant top post his "design" work. But from what I see, if the boat has an alu mast, say the 36'er, I'd guess VCG to be 1" above the DWL maybe 2". I agree with Jeff. Hard to wax on about stability without an accurate VCG.
Obviously we can't ask BS because I know better then to believe anything he posts. I think I would trust Tad's work on this. He put some time in on it and he knows naval architecture.
You know what's really scary about all this? I barely understand what you guys are saying - and I'm an ex-architect. You guys, and the guys on BDnet, are experts
on this stuff...and you're concerned.
Now, take a look at BS's target market. These are people that, for the most part, have no idea what VCG or AVS or even LWS means. They are, by his own description, "cruiser wannabes".
All they have is trust
that Brent is an honest expert who has fully addressed all of these factors in his calculations...when it appears he doesn't even know what many of them mean.
That is scary. When a guy tells you he's an expert yacht designer - you kind of need to believe he's telling you the truth.
If I were a cruiser wannabe, and I came across these concerns from real experts
, I'd be wondering if the trust I'm about to place in the vague BS drawings I'm about to spend hundreds of dollars for - then the several years and many tens-of-thousandes of dollars I'm about to throw into BUILDING THAT HUNK OF STEEL MYSELF AS AN AMATEUR!!! - might be a bit misplaced.
I think potential death by Fukushima Debris is a much, much better bet.