As I point out in my book, people often fail to differentiate between resale value and resale price. The fact that McNaughton is too dense to comprehend basic geometric principles has nothing to do with structural reality. The picture above is of wooden planking ,which has no strength across the planks , which is exactly what frames were developed for.
There is nothing floppy about a finished origami hull.Such comments reveal an absolute naivety about the subject. As for the cost beatup, you were asked before just how much it would really cost on another thread (in time and dollars) to add 5 or 6 transverse bar frames to a 36 foot steel boat. Nobody said that origami hulls are floppier, they are just weaker becasue the framing is floppier than a conventional frame. But you need to accept that some of your reasoning doesn't scale well to larger boats with much higher loads.
Location: British Columbia Points 1 and 2 apply equally to longitudinals, as they are equally supported by their being welded to the hull plate, with the added structural advantage of going around a curve, yet you insist on calculating them as stand alone, with no attachment to, or support from, the hull plate.
It doesn't cost much to put 6 transverse frames in a hull, once it has been pulled together using origami methods, altho I know one guy who turned a couple of frames into a several week project, to increase his total income for the job.The point I am making is, if you put the frames up first, then try put the plate on to fit the frames, the cost and time goes up exponentially. Originally Posted by Brent Swain Points 1 and 2 apply equally to longitudinals, as they are equally supported by their being welded to the hull plate, with the added structural advantage of going around a curve, yet you insist on calculating them as stand alone, with no attachment to, or support from, the hull plate. The relevance of frames is quite necessary to make the whole ship an almost corrugate systeme, with all the strength in all the direction. Now when the round plate is transformed in chine on your design, you have an intense stress point there, and that is no good practice. As for your other boat, they all are ceiled in wood inside and seams to cost much more that a Swan.

Fisherman and commercial are tough with the money, every cent is acconted, but you don't know that. By the way I would like to mention, a vessel of a certain size is never ever designed by one person, same for building. We may argue about his biased opinions, about his terribly obvious lack of understanding some basic engineering, but we cannot argue that he does it to harm or insult other members.
I know there are visitors here which cannot really get it together, where is the knowledge and where the anecdote.
Reverse clipper bows and wine glass cross sections would be difficult but practically any other single and multi chine hull form can be done in origami. It's clear that the longitudinals go into tension, suffer stress reversals and consequently deflect more that a pre bent frame. Originally Posted by whoosh … do these boats come with lines, as iines if one wanted to draw a body plan, for tankage floors frames etc? That can be done by the software, or you can build chine model and take the strakes patterns from it.. Originally Posted by dskira When I designed and latter on built (sorry, I built too, but that is not relevant since you want to be the only one here) if we don't put frames the vessel will have been not able to do its work properly due to wickness, let alone having the cargo capacity strength needed to pay for itself and being safe. Daniel As I only build one hull a year, a couple of weeks work, and on every on I work with the owner, who's lifelong dreams are coming true , quickly before his eyes, it never gets boring. The end of the chine where the cone begins is solid plate once the chine ends, not weld, so one is not dependent on the weld for strength. Where Paul's mast goes thru the deck, a large doubler of heavier plate, plus some flat bars on edge eliminates the chances of anything wobbling .
The only compression on the mast is only the weight of the mast, rigging and sails on a junk rig , unlike the tremendous compression on a marconi rig. Colvin estimates 1,000 hours for a hull and deck, something origami lets you do put together in under 100 hours. As I pointed out in the cabin top example, a curve drastically increases the stiffness of a piece of plate . None of my boats have ever had problems getting insurance at the best rates, or passing survey. Originally Posted by Brent Swain None of my boats have ever had problems Hope it will stay that way.