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Everything posted by wefalck
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Epoxy over PVA
wefalck replied to dkuzminov's topic in Building, Framing, Planking and plating a ships hull and deck
Sounds a bit strange. Perhaps you want to post a couple of pictures ? -
I gather the 'bible' at leas on US American whaleboats is ANSEL, W.D. (1983): The Whaleboat.- 147 p., Mystic, Co. (Mystic Seaport Museum Inc.). I quickly leafed through the illustrations in my copy to see, whether any enlightenment could be found. According to Ansel the notch for straigthening irons would be cut close to the bow on the port side (for the boat of a right-handed harpooneer). Ansel does not mention the 'tails' in the drawings. By their length and the fact that they are drawn in your plan in association with the forward thwart, I would think that these are lanyards with which the spare iron were secured to the boat. That is, if they are really 12" long. If it reads as 12', however, then these could be spare lanyards attached to the lances and the harpoons - they were attached to the iron, went along the wooden shaft with several half-hitches in between and ended in a spliced eye to fit around the wrist of the harpooneer.
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Epoxy over PVA
wefalck replied to dkuzminov's topic in Building, Framing, Planking and plating a ships hull and deck
'Micro-balloons' (https://en.wikipedia.org/wiki/Glass_microsphere) are the standard filling material for epoxy and other resins. If the model is going to be a stationary one, not exposed to water, the stiffening effect could be probably achieved without having to mess around with epoxy by just liberally painting on PVA glue. However, the more common procedure would be to use filler blocks, normally inserted between the bulkheads before the planking is applied. If you use styrofoam or other hard foam, this could be done easily retrospectively, again using PVA rather than some messy two-component resin (which would not be compatible with styrofoam anyway). -
Anyone ever seen crosstrees formed in nitrocellulose?
wefalck replied to Sparkysparks's topic in Masting, rigging and sails
Auf course, in most countries around the world, with a few sad exceptions, the trade in endangered species or products made from them is prohibited. I think you can bring into the country for personal use such items, when you can show that they are antiques and that you, say, inherited them - thinking, for instance of combs, boxes, frames for glasses, etc. The said degradation does not seem to affect too much coloured and 'filled' items of celluloid. We have in our family dolls and some household items made almost a hundred years ago and they are still in good order. -
Anyone ever seen crosstrees formed in nitrocellulose?
wefalck replied to Sparkysparks's topic in Masting, rigging and sails
I focused on the constructive uses of nitrocellulose, not on the destructive ones The low flash point was one of the reasons, why celluloid was replaced by other, mineral oil-based plastics, although it has interesting mechanical properties. Celluloid can be milled or turned much better than the common plastics (except acrylic glass) we come across as modellers. The high flammability resulted in more than one cinema being burned down. Film-archives are battling with the problem and have to store the films under special conditions. Off-topic: my late father was a chemist and had a book on explosives, their manufacturing and testing. There is a lab-experiment described in it for making gun-cotton for demonstration purposes. When I was a teenager, I tried to replicate this, but I guess I was lucky that the cotton-wool I had was not real cotton, but some sythetic fibre. I shudder, when I think, how me and a friend did this without proper lab and protective equipment ... this was at time, when you could walk into a drug-store in Germany and buy all sorts of chemicals for which you would be arrested as suspect terrorist, if you tried. I also made black powder, but its quality turned out to be rather poor. Today this kind of 'technical' drug-store doesn't even exist anymore and you would get the chemicals only, if you can proof that you are a professional. -
HMCSS Victoria 1855 by BANYAN - 1:72
wefalck replied to BANYAN's topic in - Build logs for subjects built 1851 - 1900
I gather, it depends on their absolute size. I made nice, clean drawings and reduced them in size. If I remember right, my laser-printer does 1200 dpi across and 600 dpi in the transport direction. This was not sufficient for 2 mm diameter dials/compass cards in 1:160 scale ... in 1:72 scale such dials/cards would be roughly double the size and there it might work.- 993 replies
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Thanks, gentlemen. I have been collecting special 'scrap' for 30+ years with the idea of turning it into something useful ...
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HMCSS Victoria 1855 by BANYAN - 1:72
wefalck replied to BANYAN's topic in - Build logs for subjects built 1851 - 1900
Indeed, close-ups can be very damaging to our pride 😯 Nice job, Pat, on this 3D-printed EOT. I think we will continue to battle with the physical limitations of the digital 'machining' technologies, whether they are additive (3D printing) or subtractive (CNC milling, laser cutting). Small step-sizes and positioning precision are going to be expensive. So, for the time being, we will have to live with these 'steps' on cut or printed items. I found that files don't work very well on plastics and abrasive papers often don't have the 'bite' needed, but discovered so-called 'separation' strips in dental supplies. They are used to open up interdental spaces in vivo or between false teeth. There are two variants: either the diamond-powder is fused onto plastic strips or galvanically bound to very thin stainless steel strips. Obviously the latter are stiffer and in short lengths can be used like a micro-diamond file. They come in width from 2 mm to 6 mm and different grades. I bought them from this manufacturer: https://www.horico.de/en/praxis/separierstreifen/2-uncategorised/91-alle-streifen.html. There may be a similar product available Down-Under. I cut short lengths and hold them in a pin-vise. With this I can file plastic surfaces quite well. As you probably remember, I made a couple of EOTs of the same kind some months ago. While I discarded these ideas for the small size I needed, I had been contemplating making the brass part of the dial as an etched part. The glass pane underneath could have been made by printing the lettering on an overhead projection foil (with the limitations of the printer resolution), cut the disc out and then paint it white from the back. If one still has a camera for films, one could have also made a computer drawing and photographed this so that the image on the film has exactly the right size - the film has such a high resolution, that the lettering would have been almost readable - at least with a loupe. However, I think we can file this under lost technologies. Would have been good also for really sharp compass cards ... I really love those Victorian warships that look so 'ship-shape, Bristol-fashion' with mahagony fittings and brass/bronze trimmings. In spite your trials and tribulations in finding source material, you are quite lucky in comparison to what is available for our German navies of the same period ... I always would have like to build one of those sleek 1860s gunboats, but that would involve even more guess-work.- 993 replies
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Belated thanks, Gentlemen, again Since the effective work surface on my workbench gradually had been reduced to around 20 cm x 20 cm, a decluttering action was urgently needed. On the now freed-up workbench I made two improvements to my workshop equipment that I had been planned for a long time: Tilting model stand Decades ago, together with some antique lathe parts, I had received a beautifully made cast-iron foot, the use of which had long been a mystery to me. At some point I found out that it was a table base for a small vice, that I unfortunately don't have. In my drawers there was lounging also one of these hand vices with a grid of holes to allow to clamp irregularly shaped parts with the help of short pins. I never had a proper use for it. But both parts together made a useful stand for models during construction. Unfortunately, this stand could not be tilted. In my treasure chest with 'scrap metal' was a clamp for tilting lamps in nicely cast brass. This piece offered itself to make the model stand tiltable. It was done with some modifications to the existing parts and a lathe-turned intermediate piece. Various M10 x 1 threads (standard lamp thread) were cut on the lathe for it. Fortunately, I also had such a tap. Magnifier holder for the micro milling machine It is handy to have a magnifying glass permanently installed on the milling machine. A suitable magnifying glass had come to me a long time ago as a promotional 'gift'. In the mentioned scrap treasure chest there was also the gooseneck of an old lamp and various lamp fittings. A connectiing piece to fit the magnifying glass with it M6 thread to gooseneck was turned on the lathe. The magnifying glass can now be rotated in the gooseneck. Once we can reliably order again in China, I will get another 'angel eye', a ring equipped with LEDs, as they are sold for installation in car headlights. This makes for very nice ring light, as I had fabricated for the 'large' milling machine. Only that here the ring will be integrated into the magnifying glass, because there is not enough space around the milling spindle. Work continued on the WESPE too, but of that later.
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Cutting the Rabbit
wefalck replied to acaron41120's topic in Building, Framing, Planking and plating a ships hull and deck
Before reshaping the bulkheads - check them carefully against the line plan, perhaps the slots in them or the keel piece are just to deep ? -
Anyone ever seen crosstrees formed in nitrocellulose?
wefalck replied to Sparkysparks's topic in Masting, rigging and sails
Ahh, I understand. Interesting question. There are various interesting man-made materials that have interesting properties and workabilities for model-building, but they are difficult to come by these days. We mainly use styrene, ABS and acrylic glass in model building, but builders of 'historic' ships seem to frown on them. They have become common, because they are cheap to produce. However, with a bit of searching you can find the more 'historic' materials as well. I am using bakelite paper (from around 0.2 mm to perhaps 10 mm thickness) a lot. It is brittle, but otherwise machines and sands well. Celluloid is more difficult to find. Because of its high flammability it has been replaced by other plastics. Indeed, various consumer goods, such as combs, boxes, knife and nail-file handles, fashion jewellery, buttons, frames for glasses, etc. etc., used to be made from coloured celluloid. It was also widely used to make toys, such as dolls. However, your question prompted me to search a bit on ebay, and I discovered that one can find actually a lot of celluloid, tortoise shell and other, among products for making guitars, for knife-handles, and still for jewellery-making too. One would need to verify that it is really celluloid and not some other plastic to make look-alike. Thanks to your question, I may discovered some interesting sources of material I tend to use a lot man-made materials for my miniature models, as the grain in wood tends to be too promient, even when using boxwood, or the anisotropy of wood is inconvenient. -
... well, for the moment we are under tight curfew until 11 May, but we expect that it will last longer, perhaps with some restrictions losened, as already in Germany. We have mentally braced ourselves that it will last into the summer. Perhaps this is just wishfull thinking, hoping that we can go on some sort of vacation by then. The fear is that we will see some rebound effect, once the curfew is loosened. We don't even go to the bakery, because the French bread cannot be put into quarantaine for the week before we touch anything brought into the house. Luckily, German-type bread is available from 'industrial' bakeries that lasts for several weeks - that is, if it not eaten before
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Someone showed them in a building log here a couple or so of years ago. Got immediately bag of 10 for something like 1€ directly from China and they are indeed very useful for various holding tasks.
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Anyone ever seen crosstrees formed in nitrocellulose?
wefalck replied to Sparkysparks's topic in Masting, rigging and sails
What do you mean by 'forming in nitrocellulose' ? Nitrocellulose is chemically alterated cellulose and its initial state is a kind of viscous liquid. You can use this for different purposes: - you can push it through thin nozzles and spin the resulting fibres into a thread - the first man-made thread - you can cast into films - celluloid, as used for cinematographic material or packaging, or artificial ivory (billard balls used to made from it) - you can dissolve it in solvents to make paints, varnishes, wood fillers and the likes So, perhaps you can explain a bit better, what you mean ? -
I have seen people turning out their first model as scatch-build project perfectly and some people will only build perhaps a couple of model in their life's spare time. The key point is patience and being self-critical. It is not easy to start a piece from 'scratch' again (I am sometimes guilty of not doing it ...), if it doesn't turn out right. The only reason to finish a model is our own impatience - otherwise you can take all your time to get it right ... In my opinion there are no 'beginner' models, there are only models for the more or less patient.
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HMCSS Victoria 1855 by BANYAN - 1:72
wefalck replied to BANYAN's topic in - Build logs for subjects built 1851 - 1900
She really begins to look ship-shape ! Nice details ! At this time even warships looked elegant and not only utilitarian. As John, I noticed that these swan-neck ventilators look rather big. Is this per plan ? I also noticed this nice, polished mahagony 'bench' in the stern, but most ships I have seen tend to a grating there ... A third nicely executed detail I noticed are those brass tyres on the cannon trucks. We recently had a discussion in another forum, where people argued that metal tyres would mar the deck. I think I have seen metal tyres in French sources from the 1860s/1870s, but would have to check.- 993 replies
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- gun dispatch vessel
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Crisp job, as always ! It is a good idea to glue the brass frames onto the wooden frames first and then drill and insert the bars. I remember me struggling with alining the brass frames and bars before installing them on the wood ... It is often so important to do things in the 'right' sequence, which sometimes is not the obvious or the prototype one. The bars have to be distanced from the glass, otherwise they would not protect it - anything bouncing against the bars would push them into the glass and possibly break it.
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Some people like their model flat all over, but I too think that one can play with different sheens in order to give the parts more 'body' or to accentuate different type of materials or paints. Are tethered model planes still used and is there a supply market for them ? I remember that very fine steel wire-rope was made for that, but don't know whether it would be still available. I discovered fly-tying stuff some years ago as raw material for making my own micro-ropes, but didn't know that leaders were available down to 0.008" (which is 0.2 mm in my units), making it interesting for small-scale models too. Good information for a non-angler.
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Unless it will be visible, why would you want to remove an element that adds structural strength to the model at the risk of collatoral damage. It is also good to reflect on 'advise' given in books and other sources: why do they say so and would this advice be applicable to my circumstances ? We are not in the age of the Guilds anymore, so you can do what you think is best - of course considering the technological experience other may have.
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