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447:, on this with some clear drawings that illustrate the principle. It also describes the resultant hull as being a segment of a toroid, which is a nice clear image. In this case it's claimed that the toroid hull has stability advantages, presumably (If this is my correct interpretation of the patent, I don't believe the mechanics of it) as such a toroid presents a surface with no
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This is an encyclopedia, not a social network. The ARS technique for rescuing articles produces crap ignorant articles that can't even be cleanly deleted. With a crap article squatting on a title, no progress happens in the future. ARS-ing an article is harmful and it's better to delete them instead.
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Transverse frames of constant radius. Perhaps counter-intuitive (although once again, who had a really better shape?) but it makes the jig building a lot simpler. You can make all of the frames on a single jig. This is also related to the two segment hull, rather than a single circular arc: By
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I think people are confusing two entirely different things here: hulls which are circular in cross section (at least up to the waterline), which are anything but new, and probably go back to the dugout canoe, and the
Ljungstrom sailboat hull, which isn't actually circular in cross section, but
317:- keep 'Circular arc hull' as a redirect. The hull design seems only to have been used for sailboats, and the only unique feature of the Ljungstrom sailboat seems to be the hull design. I can see no good reason to have two articles on the same object.
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If it existed before the designer, then just have a separate article for it. Is this taught in university level textbooks on shipbuilding or historic ships? Someone from WikiProject Ships should know about this sort of thing. I'll go ask them.
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territory - we'd need a source that actually covers 'circular arc' hulls as a topic, and makes clear what its defining characteristics are. This article as it stands at least makes clear what its topic is - the
Ljungstrom sailboat hull.
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instead consists of a hull having a cross section of two arcs of a constant radius, meeting in the middle at an angle to form a keel - it is a lot easier to understand from a drawing than it is to describe though, take a look here
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Transverse frames of circular section. This makes the frames easy to construct. This technique long pre-dates
Ljungstrom. Also, unless you know of a theoretically better shape (quite a modern innovation), why
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shifting the centre of the arcs, the beam can be narrowed towards stem and stern and the hull section proportions changed, even though the jig radius remains constant.
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There are no reliable sources cite that discuss this 'distinct hull design' except in relation to the
Ljungstrom sailboat. Why should we cover the same topic twice?
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The article fails completely to explain what a circular arc hull is about. As a result, this AfD. There are three aspects to the hulls described here:
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since the topic has not "received significant coverage in reliable sources that are independent of the subject". The only sources listed are not
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A merge is a reasonable outcome as long as the target notes that the design predates the
Ljungstrom sailboat (as noted in discussion above).
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make it circular? Ljungstrom claimed an advantage here (although I don't know if there's any good reason to support his theory) that radius
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defining the profile of the hull, not the elevation view of the frames. These too are not unique to
Ljungstrom. There's a later patent,
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The problem is that once we start writing about more general 'circular arc' hull designs, we are going into
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per above discussion. Distinct hull design that is worthy of inclusion per coverage in reliable sources.
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component to impinging waves, thus is rolled less by them. Note that in naval architecture, like the
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697:) 05:01, 28 August 2013 (UTC), that there is a distinct hull design that is worthy of inclusion.--
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The following discussion is an archived debate of the proposed deletion of the article below.
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Subsequent comments should be made on the appropriate discussion page (such as the article's
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Subsequent comments should be made on the appropriate discussion page (such as the article's
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This AfD should be posted on the
Engineering, Sailing, Ships and Watersports projects. --
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Andy, !voting "delete" just because of an ARS tag on the AfD could be taken as somewhat
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Circular arc hulls long pre-date
Ljungstrom, although his design was distinct.
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to generate a more thorough discussion so a clearer consensus may be reached.
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Note: This debate has been included in the
Article Rescue Squadron's
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The above discussion is preserved as an archive of the debate.
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It's not substantially changed whether you use a circle or two
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588:Please add new comments below this notice. Thanks,
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43:). No further edits should be made to this page.
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266:list of Technology-related deletion discussions
485:Better deleted outright than "fixed" by ARS.
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18:Knowledge (XXG):Articles for deletion
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