bricklayer
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Everything posted by bricklayer
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Hi Micha, the key word for measuring physical items to create digital or virtual copies of their surface is photogrammetry. The link to an article on wikipedia: https://en.wikipedia.org/wiki/Photogrammetry I remember having read an article on this subject in the quarterly publication of Arbeitskreis historischer Schiffbau, das logbuch issue 2023/1. The link to their website: https://www.arbeitskreis-historischer-schiffbau.de/logbuch/logbuch-archiv/2020-2029/lg-2023-1/ This technique seems to work fine, if only you follow the rules. There`s alot that you have to take care of to obtain reliable and accurate results. Hundreds of shots are required. I don`t think that you`ll manage to do it on a boat that`s exposed on a fair like boot in Dusseldorf or elsewhere. You`d better go for a boat whose full set of lines is available to public. Just my 2 €-cents, not necessarily your opinion. Michael
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Dan, that`s a beautiful presentation. I like the arrangement of images and text. And I like your choice of colours of the background that images and text are embedded in. If you manage to find a complete and reliable set of plans then your scale build will become a proper one. You already found many sources that will guide you along the build. Michael
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Decent small clamps
bricklayer replied to bigcreekdad's topic in Modeling tools and Workshop Equipment
Gregory, you can shrink the tubing by gently moving it over a candle flame. Just don`t stall and don`t let the flame hit the tubing. -
Famous swedish Greta was born in 1905 and died in 1990. The world was black and white then and people communicated via subtitles rather than spoken words. Nothing remains the same except for greed. I would have liked to tell a more encouraging revelation. Fortunately greed is not the driving force for all human beings. Some 6 billion people ought to find common solutions for sustainable economy and consumption. I`m in favour of EVs powered by electricity from overhead lines on motorways and national/federal roads. For short distance rides on minor roads a small battery would be sufficient. Just my imagination. I work in construction. The goal of zero emission buildings can be accomplished easily. Regarding transportation I don`t really have a clue. After having saved the world let`s continue watching Keith`s magnificent Cangarda build . Michael
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There`s a copy of that book at the University Of Chicago library: https://catalog.lib.uchicago.edu/vufind/Record/4862288 Doesn`t seem to be far from Don`s place of residence.
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Dan, I searched for publications by Roland Bockius. He`s the author of the reconstructions of the two roman river patrol boats, whose wrecks were found at Oberstimm in Bavaria. That`s what I found: https://www.amazon.de/römerzeitlichen-Schiffsfunde-Monographien-Römisch-Germanischen-Zentralmuseums/dp/3884670689/ref=sr_1_12?dib=eyJ2IjoiMSJ9.k6BzCbN41DKFxfRzj5Hz5HcoC8R2009PxNMEvWyxV9-irNnNKPwE8ME6-5niUsuhMnCzFy4ClbnCumZUKfjr03hH5GVgsQzq-YNDzIYKBVQE1aChPAJGale0Qn6eT5R7Iq3fQzP4dk1Wz1CUEO4eRK4iLfrfSPgACsiT1UqbsY9BgOCrgLPGo0B03WRw-B_R.84mV01TvMHxskQkfsw_GH_sjzdusJQvFZZbOgYWzAXU&dib_tag=se&qid=1709759060&refinements=p_27:Ronald+Bockius&s=books&sr=1-12&language=de_DE¤cy=EUR The book is currently unavailable. Perhaps out of print. I saw that book on sites that sell used books, too. Not available, either. They mention folded sheets (probably plans). I don`t have a clue how to get that particular book Michael
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Hi Dan, that`s what I found on this subject: https://www.fau.de/2016/12/news/rudern-wie-die-roemer-fau-baut-roemisches-boot-in-originalgroesse/#collapse_0 There`re plans for a reconstruction on that site, but unfortunately it`s in two planes only. Top view and longitudinal section. Neither cross sections nor side view.. You may send an inquiry to University of Erlangen-Nuremberg to obtain the full set of drawings. It`s their intellectual property, so I don`t know if they`ll share it. Just try and hope for the best. Michael
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Hi Keith, am I the only one who doesn`t recognise those bent and die-cast sheet metal things? If so, then I don`t mind. But don`t keep suspense any longer. Please tell me what was their original purpose. I`m 57 years old. Should I know what they were made for ;-)? Now I got it. And I have a vague memory of the 3.5" ones.
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Hi Roel, your patience seems to be unlimited. Somewhen you`ll reach your goal in spite of odds and extensive breaks. The superstucture with all it`s tubing and other bits looks immaculate. The more I look at it the more it reminds me of the Solvay plant in Rheinberg, a town some 25 km east of Venlo. Lots of tubing over there with some of it running across the road. It`s a mistery to me though I know that each and every piece and bit is part of a clockwork. I`d really like to see the vessel "face to face". Michael
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A further note on wood for hull planking. I`d go for fir or spruce as it`s commonly available, cheap, flexible, strong and soft. Not too soft, if coated with fibres and epoxy. Of course it dents easily. The same about lime and basswood in particular. These species are lightweight and can be machined easily. Finally it`s your choice. Michael
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RAL colour chart: https://en.wikipedia.org/wiki/List_of_RAL_colours#RAL_6000 The lower the L*% value in the CIELAB 1931 column, the darker the actual colour. L* is perceptual lightness. Looks like you don`t build a boat for the first time Michael
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Hi Keith, you`d better lock the door of your workshop before eye-surgery and keep it locked until you`re recovered. If you don`t, then your wife might enter the room to continue the steam yacht build. And you`ll become unemployed or have to do housework. Change of roles ☺️ Michael
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Hi Keith, one off-topic question: I noticed a sheet metal cover at the front edge of the mill`s table. Is there a glass scale or magnetic scale attached underneath the cover? about the forthcoming surgery: It`s going to be alright. I`ll cross my fingers. Michael
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@Wefalck, the Böhler mini circular saw table is still availiable. It`s the brand that changed, only. For a couple of years the brand of former Böhler mini tools is Kaleas. https://www.kaleas.de/en/modeling-tinker/minitool/72/minitool-table-circular-saw On ebay UK ther`s a seller who currently offers the saw for 179 GBP. The die-cast body isn`t a beauty but it looks rock-solid. It may make sense to buy the saw, only, if one already has a 12 V DC power supply @ bruce d I don`t own or use that table saw. So I`m awaiting your review. Michael
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If you buy cheap then you`ll buy twice. As a beginner I had bought the tiny toy saw KS 230. According to it`s specs it was sufficient to me. But the surface-milled aluminium table is as flat as the plastic cabinet is. It`s convex. So the fence doesn`t lie tight on the table on it`s entire length. Towards it`s free end the fence lifts and there`s a gap between table and fence. Thin stock slides underneath the fence. The fence doesn`t run parallel to the blade. I didn`t find away to adjust it. The motor`s torque is poor. The 50 mm blade has 6 to 8 mm clearance but the saw does hardly cut 3 mm birch ply. After having gained some experience I bought the FET. This tool deserves the name circular table saw. It cuts 20 mm fir and 12 mm beech and doesn`t complain about the job. The fence is rigid, parallel to the blade and tight to the table. The saw is versatile. It can be used for various applications The FET cuts voluntarily rather than being obliged to do so. My conclusion: If you can`t afford a + 300 € saw instantly, then better save your money until you can afford it. Cheap tools work properly? That`s wishful thinking. Though there`s exceptions from the rule. Michael
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Hello Brian, hi all I´ve seen towboats on the Rhine. They tow two to six barges, only. Unlike the Mississippi towboats they have elevating wheelhouses to adapt to limited clearance of bridges across the river. https://de.wikipedia.org/wiki/Schubboot#/media/Datei:Buran.rhein009.jpg I`d like to see a continuation of your build log, if you don`t mind. Michael
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Hi Tom, it sound like there`s some tedious work ahead. Will it pay off in terms of visibility? Will anyone notice that the fasteners are three piece compounds? Actually more than three pieces per fastener if each strand of copper wire is considered as a single piece. At least I`d replace the twisted copper strands by a solid brass rod. Twisted wire doesn`t represent a thread at all. The diameter/pitch ratio doesn`t fit. The diameter/pitch ratio of a regular M6 screw is 6/1. There`s no way to twist strands of wire that shallow. My point of view: Too much effort for an almost invisible effect. Nonetheless I`d like to see a sample of your suggested fasteners on scrap wood. I don`t mean to disencourage you. Michael A coil spring would represent a screw thread. But it`s way too large to pass the bore of the 0.5mm tube.
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Size of a printer needed
bricklayer replied to Frank Burroughs's topic in Modeling tools and Workshop Equipment
Hi Frank, some inkjet-printers aren`t limited to standard-size paper. They print A4 size (210mmx297mm) and custom size (up to 216mmx1200mm). 1200mm equals almost 48". So the length should be sufficient for most purposes and there`s hardly a need for print-services. The only tricky thing is to find a source for a spool of 210mm or 8.5" paper. Michael -
Claire, swap rear and front of the sheer strakes. At the bow those holes make sense. In the picture the planks are still wet. Let`s hope that you havn`t glued them, yet. Michael
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- Lowell Grand Banks Dory
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Hi mj, it isn`t your mistake that the portion of the hull next to the bow is too pointed, too straight, doesn`t have enough curvature. There should have been an additional former between the stem and former #1 to provide a proper shape of the hull. It`s an issue of kit design (saving wood). Nonetheless the finished hull looks good to me. Better than most first time builds. And you`re incredibly fast. Do you want to row the Whitehall on a lake on easter? Michael
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Hi MJ, another book suggestion to add to your tiny library: "Building Classic Small Craft" by John Gardner. I bought it a couple of years ago and I wouldn`t want to give it away. Never ever. Different types of working, fishing and leisure boats are described and depicted in detail. The book contains brief or extended history of each type of boat, linesplans, dimenions of timber, fasteners, tables of offsets, conversion of rowboats into sailing boats, other modifications and alterations. The Whitehall and the Peapod are just two of over 40 boats that this book deals with. It`s two volumes in one book. I`d call it a comprehensive one. Michael
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Sections, at least the ones I´ve seen, are always perpendicular or orthogonal to the plane that they intersect. But if the line B - B was angled, then the intersection would be an angled plane.
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Hi woodshipguy, on the same or a seperate sheet you`ll find another drawing called "section B". Your drawing shows the x-z plane. "section B" shows a fraction of the x-y plane at a particular hight indicated by the horizontal lines next to the letter "B" The arrows indicate the side of the intersected object, that`s shown in the section drawing. I guess that you`ll see a taper beginning at the bearding line, the dashed-dotted one, ending at the stern post and keel. The taper compensates for the thickness of hull planking so the garbord and plank ends at stern hit the sternpost and keel flush, without recess. I´m familiar with drawings due to my profession. If I wasn`t, then they`d be a mystery to me, too. Michael
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Rudibob, I`m glad that my previous post didn`t disencourage you. Continue your build in spite of those issues or flaws. Don`t let daylight shine through that gap any longer. That`s all that matters at the moment. I`m still convinced that the curvature of the stem piece is right and the curvature of the adjacent false keel is wrong.
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Good morning Rudybob If you request a replacement part then you`ll get a new part that looks exactly like the one that came with the kit. It`s a design issue rather than an execution or machining issue. The machine control is fed with vector graphics. It generates a toolpath. The toolpath`s a code, a sequence of commands. The machine will follow the contour lines that it reads from the graphics file. I don`t think that Modelexpo will adapt the drawing to compensate for mismatch between stem piece and false keel. The contour line of the stem piece looks right to me. The contour line of the false keel should be congruent, but actually isn`t. A portion of it`s curvature is too shallow. So I`d fill that gap with a narrow strip that`s approx. half as wide as the false keel`s thickness is. The strip becomes part of the rabbet, then. Hope you`ll succeed Michael
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