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Everything posted by wefalck
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Perhaps your knight is a 'dragon whisperer' ? Many years ago I built a model of a Knight Templar with the same kind of helmet. One thing I was never too happy with it the metallic appearance of the material. Somehow, the surface of these castings is always a bit uneven. I never tackled another model like this, but perhaps today I would look into smoothing the surface with a burnishing steel or agate, rather than just polishing it with a felt-wheel. Has anyone tried to burnish such metal parts ?
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Indeed, finding the right sequence of placing things on the model can cause a bit of headscratching, demanding foresight exercises, and imagining of possible interferences ... I tend to make the parts separately first and then paint and assemble everything. Nice work so far, as others already said!
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Valeriy, that's actually a clever idea, that could be possibly adapated in the other direction as well, meaning to very small half-round profiles, say below 0.5 mm wire diametres. Perhaps the process could be aided by embedding the wire during winding into shellac. Once machined, the shellac can be easily dissolved in alcohol to free the profiles. I have used a similar process in the past by cementing with shellac short sections of wire to a small aluminium block and then grinding away half of the thin wire. The drum method obviously would result in longer and probably more uniform profiles. And yes, by repeating the process on four sides, one could probably produce miniature square and rectangular profiles from round wire - I recently purchased a small rolling mill for this, but these profiles would still have slightly rounded edges. 👍🏻
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I would suspect that these bars (old rails upside-down?) are distance-pieces to prevent the cobble-stones coming into direct contact with the rails. As you can see from Amateur's sketch the wheel-tire actually protrudes slightly beyond the head of the rail. If the cobble-stones were a tad too high, the tire could touch them. One doesn't seem to see this kind of arrangement on tram-rails laid into tarmac or concrete. And yes, tram-rails are better given a wide berth by cyclist - guess how I know that 😉
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Brass stock in small sections....?
wefalck replied to Mark Pearse's topic in Metal Work, Soldering and Metal Fittings
Fine-toothed HSS, the thinner the stock, the thinner the saw-blade should be to avoid 'hooking'. It sounds strange, but sometimes running the blade the wrong way around gives better results with thin stock (same for piercing saws). It can be also a good idea to stick sheet-metal to thin plywood or thick cardboard to reduce bending and hooking. -
In spite of your challenges, the planking looks good. As this is not an open boat, the inside look is not important and one can do a bit of tweaking. In clinker-planking it is important to remember that planks are not only tapered, but also curved (as seen in the plank diagram from the kit). That should take care of the up-sweep problem that you mentioned at some point.
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Pin-rails post-script When trying to fit the pin-rail with the consoles attached, I realised that I had overlooked a point: the tumble-home of the bulwark. This means that the angle between the pin-rails and the bulwark-stanchions is not 90°, but is a slightly obtuse angle of about 100°. In consequence, I had to remake the consoles with this angle. As the process is essentially the same as described in the previous post, I am only showing a picture of the final result. Pin-rail on consoles affixed temporarily Another small tool-making digression Milling the above profile required that the stock is oriented perfectly parallel to the X-axis of the micro-milling machine. While orienting the little vice is quite easy with the help of squares, orienting the stock on the face-plate would normally require tramming it in with a lever-gauge. The problem is that the lever gauges are far too big for the little milling machine. So far, I have eye-balled it with a pointed cutter in the spindle and some light test-cut to verify. This has been somewhat time-consuming and unsatisfactory. Thinking about the problem, I remembered the so-called ‘wiggler’ (https://www.instructables.com/Wiggler-Center-Finder-for-the-Lathe/) and designed a tool based on the same principle. It is basically a stick that is pivoted at some point along its length, so that it can move freely at an angle. There is longer and a shorter end. The latter is brought into touch with the workpiece and any movement is amplified by the longer end. I miniaturised this to a total length of 33 mm so that it fits easily between the milling spindle and the cross-slide. It consists of a piece of 6 mm diameter aluminium rod, that is turned down at one end to 2.4 mm to fit into a collet of that size. The diameter was chosen, because it is the shank diameter of the common burrs that I often use as milling cutters. That saves changing the collet after tramming. Mini-lever-gauge and its ‘mechanism’ (right) The rod is bored out 3 mm along most of its length and a 4 mm recess of 1.5 mm depth is turned in. This recess takes up a disc that has been punched out of a section of some polyethylene tubing. The feeler lever is an ordinary clothes pin, the head of which has been turned concentric (the stamping process of the pin production does not lead to completely concentric heads). At the upper end of the bore, a section of the aluminium rod is milled down to half the diameter, allowing to observe the movement the pin in this window. The polyethylene disc is secured in the recess with a drop of general-purpose glue and the pin pushed through it concentrically until the pointed end arrives at the milled-out section. The flat has a few lines engraved to be able to better judge the movement of the point. With this the little tool is complete In use the pin-head is brought into contact with the workpiece and the slide moved a tad in until the point coincides with one of the lines. When running up and down the workpiece edge, one observes the movement of the point and adjusts the angle of the workpiece until the point remains steady. Tramming the mini-vice with the aid of the lever-gauge The tool is perhaps a bit crude and not as sensitive as a commercial lever gauge, but it serves the purpose. To be continued …
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That look like a glorified pen-holder with an ordinary drawing pen ... I have a whole collection of them, including the penholder from my school-days (when in art-class we did a bit of kalligraphy and pen-and-ink drawing). I have tried to use it with acrylic paints (Vallejo model air), but found that they dry rather fast, making it necessary to clean the pen frequently.
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Looks really grotty ... as intended 👍🏻 I play around with gloss acrylic varnish and gloss acrylic gel to get the impression of something being wet, but I think I mentioned this already. NB, I wasn't aware that in the anglo-saxon world, culm means the gangue or tailings from coal-sorting or -washing. For me as a geologist Culm is a particular type of rock-formation (containing little coal actually) of the Carboniferous.
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Before I had a lathe, I turned parts exactly the same way …
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This boat has, indeed, rather full ends. I went back to the first page of the log and looked at the side elevation and one thing one notes that the planks rise at the ends - which is their natural tendency with full shape, particular for planks that are below the turn of the bilge. Could you perhaps mark on stem and stern the position where individul planks should land? A slight rise would actually take out some of the sharp bends - which is difficult to visualise and explain. I didn't go again through your research, are there any photographs of beached boats of this type (assuming that they have survived into the age of photography).
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I think in some building processes, such cant-frames were actually fitted after the planking is on. Much like it is done in clinker building. This allows for a natural run of the planks, without forcing them around the cant-frames. However, doing it on the prototype, where the run of the planks is determined by tradition and the builder's experience is different from trying reproduce an actual run on a model.
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Metallic paint questions....
wefalck replied to CPDDET's topic in Painting, finishing and weathering products and techniques
The tinier the pigment particles are, the closer you get to a 'metal' look. In the old days I used to stir gold bronze paint really well and then let it settle for a while, after which I only worked with the small particles still floating on the surface. I gather there is a similar effect with the marker pens, as in these the metallic pigment particles have to be really small in order to pass through the felt-tip. -
Brass stock in small sections....?
wefalck replied to Mark Pearse's topic in Metal Work, Soldering and Metal Fittings
See my response in your RANGER building log ... -
Wire for standing rigging became more prevalent from the 1860s or so on, initially iron and then steel. I am quoting from memory, but wire rigging has about half the diameter for the same strength as hemp rigging. I would suggest to consult some contempory literature on yacht rigging for the dimensioning of the rigging and how the wire was worked. A diameter of 3 mm for the standing rigging of such heavily canvassed boat seems a bit too thin for the time. I have the feeling that crimping wire for standing rigging would have come into use much later than the early 1900s, but I am not so familiar with yachting practice. On commercial shipping more traditional methods with bound loops around deadeyes or hearts would have been used. Such arrangement is also easier to repair and does not require heavy tools. If traditional set-up methods were used for rigging, these can be easily reproduced in 1/12 scale. I don't see the need for any soldering.
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I don't know about Australia and your location, but I typically buy brass profiles from shops that supply architects and architectural model builders (they become fewer though due to the competition from 3D-modelling and rendering). Otherwise, I often go to (mainly Chinese) ebay sources. OK, I feel a bit guilty about that, but they often have very good offers and a wide range of stuff that is difficult to find in physical shops - and it is my money we are talking about after all 🫣
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