Still its too bad in a way the concept of bilge keels hasn't been more aggressively pursued in recent years. To my simple understanding if you had twin bulbed keels you might get very reasonable stability without major draft and ability to careen while being upright in a large tidal zone much like the British do.
With twin keels, your stability is roughly the same as with a single keel with same draft, the depth of the ballast being the same. With the keel being the centre around which a boat rolls, having two such centres in a twin keeler drastically reduces rolling. The ability to dry out for maintenance, while drastically increasing the odds of having a cleaner bottom for more of the time, is not the only advantage of twin keels. Many places where I have been anchoring for decades are not useable by boats which cant dry out ,and the deep water alternatives are not all that attractive. That is one of the reasons I have benable to avoid moorage fees. My uncle, who cruises Queensland, said that entire coast is mostly open ocean with only really protected water being river mouths ,available only to boats which can dry out, and have less than 5 ft draft. If you cant dry out and have over 5 ft draft there, you are rolling in an ocean swell. A couple who did a circumnavigation on one of my 36 footers ( Island Breeze) said that is the case not only there, but in many cruising areas w around the world.
Steve said being able to dry out on Silas Crosby was a huge advantage in the Straits of Magellan enabling him to sleep soundly, while the ingle keeler skippers were awake all night, worrying about dragging anchor. No way two keels hard aground are going to drag .
Such practical considerations , simply don't show up in mathematical calculations and those who only understand that which can be expressed in numbers, don't have a hope in heel of comprehending such practical considerations, especially if, like Bob and Smack, they have no hands on experience ( which makes them a poor source of advice on any practical considerations of yacht design.
On BD.net anyone supporting my arguments, including several Coast Guard members were automatically accused of being me.
Naturally ,anyone bringing attention to practical maters are automatically, defensively attacked by those who are weak in comprehending practical matters due to lack of experience in actually trying to use what they advocate .Fortunately, they are not the only ones reading my posts, just the loudest , trying maintain their illusion of relevance. I often get private emails asking for info which they didn't want to ask on the forums , for fear of getting ridiculed for not buying the "Just throw money at me and I will solve it." type of response.
I am happy to give them low cost, simple solutions , which would get shouted down, by jeering adolescence, on the forums.