Hi everybody, I saw this late 1970s 46 ft S&S designed racer for sale and was wondering whether it would make a good cruising boat. It won the...
Freeship seems to be a great user friendly program. I have just installed the latest version 2.6, and for some reason I cannot view the curvature...
Open 60 style hull, say about 7-8 tons, 3 of which is water ballast; no lead at all, twin bilge centerboards as far apart as possible, and twin...
Hi all, I have repositioned this question from "materials" to here. I was not getting any bites. I need to determine laminate thickness as a...
Hi all, I need to determine laminate thickness as a function of number of layers, ratio of fibre to matrix, and the areal weight of fibre. So...
I am attracted to the properties of a double sided wrap-around mainsail on a cantilever mast. Very clean entry, simplified rigging, much...
Have a look at this!: The really big one I want a single hander, with a lounge room, and a pool table and a...
Hi all, I read with interest Wardi's thread, on the balance of sailboats. No real conclusion was reached there about how to design balance into...
I like the idea of just having one sail on a boat, but you do not see many of them on large boats. They have to be simpler and from what I...
Hi all, Take one hull of a big racing cat and put a deep bulb keel under it: The sail area would be halved and the cost quartered. Ok,...
hi all, I need to know the moment of inertia (second moment of area) of a naca 0012 section, for structural purposes. Anyone know it Thanks in...
I was reading in Pierre Gutelle's "The Design of Sailing Yachts" that there is virtue in having a gap between the mainsail luff and the mast. He...
Little ole me is starting to get the distinct impression there are a few quite knowledgeable and professional designers, engineers and sailors on...
hi all, I wonder what people think about what the "optimum" jib to mainsail proportion is, for sloops. I guess that maybe there is no optimum....
Is it possible to have an inboard engine, with a demountable or tilting outboard, electric or hydrolic propeller unit with wires or hoses leading...
Hi all, What a compromise! I wish boats did not have to have engines. Yet how to get along without them, especially if you want some mod...
hi all, I am really impressed by the potential of canting keels - all that righting moment, means you can design rather more slender hulls,...
hello all, There are, i suppose a lot of do it yourselfers, and i think there would be a lot of interest in an engineering forum, designed to...
it's a proa, specifically a pacific proa. It is arguably the most efficient sailing machine of all. Here are the main entry points for those...
hi again, When submitting images, diagrams or other explanatory information, does one have to worry about copywrite, and /or formally...