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wefalck

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About wefalck

  • Birthday 05/01/1956

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  • Website URL
    http://www.maritima-et-mechanika.org

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  • Gender
    Male
  • Location
    Paris, France
  • Interests
    19th shipbuilding and naval history, indigeneous boats and their history

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  1. Read a lot of good things about them and took the opportunity to look at them at a stand during the model engineering exhibition in London in January. However, I found them far too coarse, at least for my purposes. For instance, the needle files could not be used on really small parts.
  2. You must have a huge stock of metals ...
  3. Yep, shellac or zapon are my solution. You can soften it with the solvent again, if you are not yet happy with the shape. This can be also done in sections.
  4. Thanks, Jan, for your kind words ! The photographs were taken with a close-up lense and at an oblique angle, which probably resulted in some distortion of the image. The Euro-cent should look like an ellipse.
  5. Thanks for the kind words ! **************************** Buffer beams In order to limit the recoil and the running out of the gun, buffer beams are installed at both ends of the frame of the lower carriage. Each beam carries four buffers against which the front cross-beam of the upper carriage runs. The buffers are designed as pistons with piston rods screwed to the back of the beam. It is not completely clear what the elastic elements were. The drawings seem to indicate rubber discs with metal separating discs. On some of the guns at Suomenlinna fortress there are remains of rubber discs, while the demonstration model of the Danish navy seems to have spiral springs. Buffer beams on the lower carriage The bodies of the buffers were turned from 1 mm soft steel wire. The spring element was simulated by winding around it several turns of 0.15 mm tinned copper wire. Whether this is meant to meant to represent rubber discs or springs I will decide, when it comes to the painting stage. One buffer dry-mounted The nuts that keep the buffers to the beam were also turned from 1 mm soft steel wire. First, the hexagon for a 0.6 mm spanner width was milled on in the dividing head of the micro-mill. On the lathe a 0.4 mm hole was drilled and 0.3 mm long nuts parted off. And no, I didn’t cut a 0.4 mm thread Buffers and fastening nuts The parts of the buffer beams were laser-cut from 0.15 mm thick Canson paper and soaked in wood-sealer. They were folded and assembled using zapon varnish. In order to make folding more precise, a row of tiny holes were ‘punched’ along the folding lines with the laser-cutter, which weakens the material there. The rivetting was simulated by tiny drops of acrylic gel that was applied with a syringe and a fine injection needle. The needle was ground flat at the end for this purpose. Buffers and fastening nuts – the buffer have a diameter of 1 mm More details were added to the lower carriage. A heavy forged claw at each end of the frame hooks under the rail on which the carriage trucks run to prevent the carriage from lifting off the pivot. The profile of the hooks was taken off the original drawings and cut in multiple copies from Canson paper. These were glued together as a stack and sanded smooth – not a 100% satisfying solution, but filing such tiny but wide claws from the solid I found too fiddly. The lugs that attach the claws to the frame were also cut from Canson paper. Safety claw, pivot plate and drive shaft The gun is trained with the aid of a curved rack, a crown-wheel segment in fact. In to this rack made from bronze, a steel pinion engages that is driven by a shaft from a sort differential, which is powered by man-power from the deck below the barbette. After some consideration I decided not to make the pinion, though I would have liked the challenge, because it will not be visible once the gun has been installed on board. The driving shaft, which also is barely visible was fashioned in a simplified was from a clothes pin, the head of which was turned to shape. To be continued ...
  6. It is common illusion to say 'the government has money' - the government doesn't have any, it takes it from us and redistributes it to others ...
  7. I don't know anything about these AmericanBeauty resistance soldering units, but they appear to me rather over-priced. Just looked at their Web-site and saw for instance an accessory that is called 'grounding vice' at 160 USD. Effectively it is one of those ubiquitous engravers vices that are sold at around 20 USD mounted to a heavy footplate. Likewise, to sell a foot-switch at 56 USD seems to be a rip-off ... resistance soldering is used, for instance, also in watchmaking and -repair, particular to solder feet to clock dials. There, people have build their own units and I have seen construction plans on the Web.
  8. Sorry, should have said 'German-speaker'. I think the Clou-products are also available in Austria, if I remember correctly from my years in Vienna.
  9. Elegant way of forming the cog-wheel and the pinion by knurling. I probably would have cut them the hard and traditional way, as watchmakers do. I don't understand, where the drive goes to and what the lever does. Is this a double bevel-gear drive that leads then down inside the ventilator ?
  10. Gloves and running machinery are a no-no. The glove can get caught in chucks etc. and cause serious injuries. What you do is your business, but please don’t give people ideas.
  11. Use solvent-based varnish. Almost innvisible and can be loosened again with a drop of solvent. I gather you are German, so look out for Zaponlack (e.g. from Clou). During the crisis colourless nail-varnish will do, but it has to be the acetone-based one, not acrylics-based. The latter is difficult to dissolve on a model.
  12. Actually, the problem are the people, who use the chemicals inappropriately ... Just out of curiosity: what crime can you commit with acrylic adhesives ?
  13. Manufacturers do stick to set scales, but different areas of modelling (for historic reasons) prefer different scales. 1/120 is the gauge TT railway scale and approximately that of the 15 mm wargaming scale 1/96 is half of 1/48 and close to the gauge HO railway scale (1/87); close to the coomon ship model scale of 1/100 in continental Europe 1/72 is a common scale for model soldiers in (soft) plastic, model aircraft, and close to the OO railway scale (1/76) 1/60 is the scale of the 30 mm flat model soldiers and also used for some ship models 1/48 is the classical gauge O railway scale, commonly used for military and aircraft models; ship model in continental Europe are 1/50 scale 1/32 is the classical model railway gauge 1 (or 7 mm) and model soldier scale and also used for military and aircraft models
  14. That's a very good idea, to solder the spokes from the central boring in order to avoid messing them up with solder. Have to remember that !

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