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  1. I have designed various models for 3D printing (for my own use rather than for sale) over the years, so here are some of my own design bungles : 1) Rushing to beat a Shapeways price rise, I put my design file through a repair program prior to uploading. The repair program removed a few details from the model. With no time to correct the "correction", I submitted the design anyway, reasoning that I would manually restore the missing bits when I received the print. 2) Baulking at the apparent complexity of a bogie design, I decided to create a simplified model which I would detail manually after printing. Not only did the simplified bogie not look like anything, I forgot that bogie frames are "handed" and ended up with four identical frame prints rather than two opposite-handed pairs . 3) Having designed a wagon body and chassis separately, I mated them to form a one-piece design. Unfortunately, I got the chassis the wrong way round. It wasn't possible to manually correct the delicate details on the print so I left it as was. Not only that, I decided not to correct the design so that all subsequent models would be consistent (ie wrong) with the first . 4) Owing to a measurement error, a coach print ended up 0.8mm too wide. This might not seem like much (for 3.5mm scale) but it gave the model a somewhat pear-shaped profile . As the print was expensive, I decided to salvage it by manually sanding and filing away the excess and then reprofiling the original design (a more involved process that I might have wished). 5) Part-way through designing a model of a locomotive, I realised that it was actually starting to look like another (but very similar-looking) type instead. I saved a copy of the design as that other loco before trying to correct the original to represent the intended one.
  2. According to Michael Collins' book, 601999 was apparently built as a double-ender, the other two were converted from inner vehicles and renumbered to 601997/998. There are photos of all three on Paul Bartlett's site - 601997/8 appear to retain their original headstocks inboard of the bufferbeam extensions, but the photo of 601999 is after allocation to Departmental use, including end steps which make it difficult to see whether it too had the superfluous headstocks (although if it was originally built as double-ended, one would imagine not). There was also another double-ended conversion, 601996.
  3. Some hasty photos of the model containers : The Fleischmann model has been lengthened by splicing two containers together, hence the none-too-convincing rust to try and conceal the joins. There were also large gaps around the (opening) doors that had to be filled. The blue factory paint is fading for some reason - presumably some reaction to my touching-up. The Rowa model with the pale stripe (but not deeper - that will teach me to check the model first!)
  4. I believe that these containers were used by a company called Winnic - Winn International Containers. I have seen a few such containers in photos from the late 1960s but none later. There are actually two models available in HO scale by Fleischmann and Rowa - the latter using a deeper but paler stripe. The Fleischmann example is a bit short though. Curiously it bears a Freightliner number but with a W suffix. There are a couple of images in Freightliner - Life and Times - pages 53 centre (Wembley? late 1960s) and 65 centre (Parkeston Quay 1968).
  5. If the file becomes distorted between export from Netfabb and appearance on the website it may be that the website's own repair system is causing the distortion as it attempts to repair the file (some systems can be quite aggressive in their corrections, lopping chunks off or plating over large parts of the model), even if Netfabb reported that the file was error-free. If the corrected file can be downloaded it may be possible to re-import it into one's design program and manually restore it there. I can't comment on Meshlab as I find it incomprehensible
  6. As there is limited trade support for UK-outline HO I have tended to adopt an "all-inclusive" approach for my designs, having previously been caught out when a particular component is discontinued or difficult to obtain. If suitable parts are readily available in 4mm then I suppose that it would be possible to delete much of the underframe equipment so it is easier to fit them, although redesign would otherwise be restricted to resizing. As far as resin casting goes, I am not sure if the design would stand up to it, because of the thinness of some areas. Designing a kit from scratch might be more effective than converting an integral design.
  7. A few ferry wagons in HO - variations of the Ferry High, plus the Ferry Tube. All are printed in FUD as an integral unit because of the various brackets that connect solebar to body. This in turn means that inside bearings have to be used as the axleguards would probably break when bending them out to fit pinpoint axles. All were produced under the Print It Anyway scheme as minimum wall thickness etc is violated in several places. Bearing / brake shoe assemblies and RIV buffers are attached in or underneath the wagon. RIV plain bearings and sheet rail (not operational as it would be too fragile) Roller bearings and sheet rail Roller bearings and no sheet rail Cut-down version Ferry Tube
  8. I did use the 38mm KW bogie but as it was supplied with 9mm wheels I swapped them for 14mm.
  9. The internal width is about 28.5mm, tapering to 26mm at the ends. I have installed KW bogies myself and they will fit (after trimming each end), but one needs to open out an aperture right out to the brackets projecting down from the chassis at the bogie centres. The brass tube attached to the chassis is listed as 2.38mm across. To allow sharper curves to be negotiated the projecting bogie brackets were removed from the chassis and fitted to the bogies themselves. The moulded cab interior partitions support the body at the correct height so I retained these but with cutouts to accommodate the mechanism.
  10. ​Hiya Here are some of my 3D-printed items over the past few years (mostly in 3.5mm scale) : I have designed and had printed various Portsmouth units – 4Cor, 4Buf and 4Res. My cunning plan to use Prime Gray for the motorcoach bodies and FUD for the window frames went awry because I had not allowed sufficient clearance, hence the window apertures had to be opened out in order to fit the frames without them distorting. The trailer cars (other than the Buf buffet car) were done in FUD, which gave less trouble but considerably more expense. The underframes are generally WSF braced with brass tube and furnished with Tenshodo motor bogies and Fleischmann trailers. Jumper cables and roof details are from Dart Castings or the scrapbox. A 2Hal is similar in composition but fortunately didn’t require separate window frames. The Fleischmann trailer bogies were so costly that I designed my own. Years ago, I decided to attempt a Class 86. I cynically used Prime Gray for the body, mainly because the stepped finish on the roof dome would require considerable filling and sanding which would in turn correct the badly-represented roof shape which doesn’t look right from certain angles. Unfortunately, the design also seems prone to developing a bend during printing, which then requires further correction. The underframe and bogies were originally FUD but since other FUD items have deformed under load I use WSF for chassis now. For bogies I usually use an internal – inside bearing – WSF stretcher with a cosmetic FUD sideframe. But in the case of the Class 86, the bogie frame is WSF and clips to the Tenshodo bogie. I also designed the Floyd Rail variant but lost interest in it and converted the print to a conventional 86 using parts from a failed print. All will be 86/4 since having spent my formative years on the Southern, a train looks incomplete without a mass of jumper cables on its front. Having acquired some scratchbuilt LMS coaches (Reidpath?) on Ebay, something would be required to haul them. Without building a steam engine, there was only one credible option – the Ivatt diesels, 10000 and 10001. After several false starts, reasonably representative bodyshells were designed for FUD and married to WSF chassis and bogie frames. I couldn’t find a motor bogie that would allow an A-1-A-A-1-A configuration so ended up rebuilding some BEC / KW Trams bogies (by remounting the motor on edge to allow for larger wheels) to give a 1-B-B-1 arrangement. On tests this seems to work and negotiate required curves. I have also attempted a wagon – the Open AB. One example uses a WSF underframe with a High Definition Acrylate body. After I removed the internal tiebars intended to maintain shape during printing, the body developed a camber in the floor which consequently rotated the sides outwards, a defect that necessitated cutting away of the floor. So that wagon will have to run with a load to hide the damage. Another, all-FUD example does not seem to have suffered from the same problem. Buffers in both cases are WSF for strength. In order to convert Lima Mk.2 coaches to air-conditioned types, some substitute window strips were printed in White Detail plastic, but the doors were not altered (to include the distinctive grilles whose absence is fortunately disguised somewhat by the livery) and I have not designed underframe equipment (yet). New B4 bogies are in WSF.
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