New_Expensive_Teeth Posted May 24, 2013 Share Posted May 24, 2013 I have a carriage under development for N gauge (technically 1:152, 2mm finescale) based on a non-bogie 8 wheel carriage for the Metropolitan line circa 1868 after pony trucks were fitted; these found their way to the Burry Port and Gwendraeth Valley Railway in 1909 owing to their suitably low height. This is my progress on the bodyshell thus far: Currently done are the roof fittings (not entirely sure what they are), and the panel lines for one of the ends (minus the iron bars transverse to the body and vertical in the centre); roof is a bit angular at the moment but I am working on a resolution to that. The final model is projected to be 79.2mm along the body, 16.5mm wide and 22.6mm in height including flanges; finally, wheelbase will be 57.4mm. I would appreciate any comments on work so far and whether there is a demand for this kind of vehicle, also welcome are any tips for making such models for 3d Printing - I intend to print these in Frosted Ultra Detail on Shapeways. Thank you for your time. Link to post Share on other sites More sharing options...
Bluebell Model Railway Posted May 25, 2013 Share Posted May 25, 2013 Looks good so far, started some Met Coaches in 4mm, but sadly got a bit technical for me, after many technical issues, and didn't continue. Top roof fittings known as Roof vents for the lights. But looks good so far, from what I can see. Link to post Share on other sites More sharing options...
New_Expensive_Teeth Posted May 25, 2013 Author Share Posted May 25, 2013 Looks good so far, started some Met Coaches in 4mm, but sadly got a bit technical for me, after many technical issues, and didn't continue. Top roof fittings known as Roof vents for the lights. But looks good so far, from what I can see. So the acetylene lamps in the carriages had vents to provide fresh combustion air? Interesting use of welding gas in a tunnel environment, probably the last place you would like to use a gas lamp. Link to post Share on other sites More sharing options...
New_Expensive_Teeth Posted May 26, 2013 Author Share Posted May 26, 2013 These are my latest improvements, in PTC Creo Elements/Direct Modelling Express 4.0 (my 3d package) it turns out you need to increase the "graphical resolution" by going Settings / 3D-Object / Part Misc. and increasing the slider at the bottom; just a small tip for those looking to try (I'd say go, if you liked Pro/Engineer, then this is a lot like that and completely free for up to 60 parts per assembly). Anyway, windows are now present and awaiting panelling detail: A better look at the windows: Link to post Share on other sites More sharing options...
New_Expensive_Teeth Posted May 27, 2013 Author Share Posted May 27, 2013 The body is finally ready for a test print, at least when I complete the first chassis: Close-up of Doors and Windows: Link to post Share on other sites More sharing options...
David Bigcheeseplant Posted May 27, 2013 Share Posted May 27, 2013 I built one of these coaches as a grounded coach body for use on our Aylesbury model the sides and end were laser cut from paper and card. Link to post Share on other sites More sharing options...
New_Expensive_Teeth Posted May 27, 2013 Author Share Posted May 27, 2013 I built one of these coaches as a grounded coach body for use on our Aylesbury model the sides and end were laser cut from paper and card. I love the varnished effect, did the metropolitan carriages just have varnish or were they maroon? Link to post Share on other sites More sharing options...
David Bigcheeseplant Posted May 28, 2013 Share Posted May 28, 2013 They were varnished but my model has a layer of shelac to proctect the card it has now been painted in station colours cream with red oxide doors David Link to post Share on other sites More sharing options...
Bluebell Model Railway Posted May 31, 2013 Share Posted May 31, 2013 Great work so far... Look a lot better than what I've done so far... but I'm limited as I know nothing on this sort of thing, great work. Hope the test print goes well. Link to post Share on other sites More sharing options...
New_Expensive_Teeth Posted June 6, 2013 Author Share Posted June 6, 2013 This is my idea I want to experiment with in FUD - a replica chassis featuring authentic radial trucks as per the prototype. I accept that this may not go to plan, but I feel I need to push what I know about FUD as a material, perhaps what other people know. EDIT: Just discovered that this will not work without compromising the looks and function of the chassis - will retain this post so you all know my general idea. Link to post Share on other sites More sharing options...
New_Expensive_Teeth Posted June 7, 2013 Author Share Posted June 7, 2013 This is an update on the arrangement I aim for, disregarding wheel clearances for the moment. There is a radial truck pivoting from above the inner axles, which have a conventional pin-point bearing setup; the outer axles use an alternative setup similar to the Hornby 4-VEP, where the axles are inside the mounts - this allows external detail to be retained while allowing a prototypical negotiation of curves. Link to post Share on other sites More sharing options...
New_Expensive_Teeth Posted June 12, 2013 Author Share Posted June 12, 2013 I have finally made my order at Shapeways, printed in FUD. ETA should be 2-3 weeks. Hopes are high Link to post Share on other sites More sharing options...
New_Expensive_Teeth Posted June 20, 2013 Author Share Posted June 20, 2013 Received my carriage prints yesterday - Shapeways is such a modest company The Body looks great, with fine line detail present and correct, aside from the door edges which are swallowed up by paint; perhaps two embossed edges instead of one engraved? Carriage is strong as a result of a thick roof, which becomes the spine of the Body. Longer sides are flexy and window sills are too fragile for my liking, so they'll be getting thicker in the next print. Chassis has it's faults - quite a few in fact! Radial Trucks arrive too stiff, both wrt axles and pivots; the custom pins made for the pivots are too fragile as well, warranting replacement with standard Farish Bogie Pins. After sanding and reaming, both problems were vastly improved so there's some hope at least. Chassis itself was made too thin, so it couldn't quite stand up to manhandling - something which is unacceptable when the radial trucks may need servicing. Couplings were quite formidible looking and proved tough, but inside they were too thin for proper coupler operation. Finally, while the inner axle mounts were sufficiently able to hold the axle in whilst allowing rotation, they were too tight for my liking and could do with reinforcement. To conclude, my ego is slightly fuming that I couldn't quite nail some basic things first time, but at least the concept shows some actual promise this time around Link to post Share on other sites More sharing options...
Bluebell Model Railway Posted June 20, 2013 Share Posted June 20, 2013 Have to say though that's pretty good for a first go! Coach body looks great! As always I guess these are sort of living prototypes, Its a great concept and you never know how it will come out until you do the first one, once you do one, you have the info to put in improvements or to carry over to another design... I do like that chassis though I think that radial axle is neat solution.Great work and look successful to me! Link to post Share on other sites More sharing options...
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