You are right, that was a typo or bad choice of words. Bob never makes typos? The pounds per inch immersion rate is exactly the same for a given waterline beam and length, regardless of displacement. I use the chart out of Skenes elements of yacht design. However, the percentage of increase in total displacement 1,000- lbs gives you us much higher in a light displacement hull than in a heavy displacement hull, as is the change in performance.
Yes, I had understood what you mean notwithstanding you talking in absolute terms while you should be talking in perceptual terms regarding boat displacement.
What pisses most is your fanatical views about steel to be the most appropriate material to build almost all types of sailboats while it seems to me and to the market that it is not the case and I don't buy that talk about sailors not knowing what they want. They know and the market is a response to that and not opposite way.
On the market the ones that want a steel boat are so few that with an American exception you have no production boats made of steel and even in what regards the American one (I don't remember the name) I guess that call it production boat makes not much sense given the number of boats build each year.
That does not mean that some sailors would not value so much the advantages of steel has that want their boats made of steel, there is even one small segment of the market were almost all boats are made of steel. It is so small that it does not justifies a production boat. I am talking about expedition boats, specially the ones designed for high latitudes.
Here you have some examples:
Sail with us to the Arctic... from Pascale Otis on Vimeo.
But even if the superior strength and facility in what regards repairs makes the steel the best choice when it regards extreme conditions, specially with ice, danger of grounding or material abuse involved, even "normal" voyage boats today chose as choice material aluminium and the demand is so significant that there are several shipyards making production aluminium sailboats. They are the most common choice even when high latitudes are involved if they are not the main sailing grounds of those boats. There are also many production fiberglass and other material sailboats designed with voyage in mind, voyage that does not involve or extreme latitudes or ice travelling.
That does not mean that a steel boat is not the ideal boat to someone, even if he does not voyage, just happens that perceptually the ones that prefer that choice (and their advantages over the disadvantages) , even for voyaging, are very few.
On this thread the last (many) pages have been out of subject and I don't think some more useful information can come out of it. Steel boats on other hand, even if marginal to the market are an interesting topic so why you don't open a thread about steel boats where we could talk about different designs and designers that work, design and make today steel sailboats? I think that would be an interesting information to this forum and to the naval community. I will post there regarding the knowledge I have (not much) regarding designers that work in steel.