Giles Posted November 19, 2022 Share Posted November 19, 2022 As a drawing exercise ( primarily) I've been drawing up a Tattoo from the original class GA's. I've made slight updates to make it Stanhope specifically, and I've got boiler and tank done thus far. Printed In Eono Engineering Like Resin at 10 microns, it takes a while to print, but the results are good. The speckling is grey primer. The machine is a Mars 2 Pro. 6 6 Link to post Share on other sites More sharing options...
Quarryscapes Posted November 20, 2022 Share Posted November 20, 2022 Very nice - where did the GAs come from? Link to post Share on other sites More sharing options...
Giles Posted November 20, 2022 Author Share Posted November 20, 2022 They were published in the NG&IRMR No.105. Cleaned up a bit on computer. However, the tank was actually built with a smaller filler, so I need to re-print that! Link to post Share on other sites More sharing options...
Quarryscapes Posted November 20, 2022 Share Posted November 20, 2022 Ah yes the Kerr Stuart issue, I should have remembered that! Looking forward to seeing this build, I have a major soft spot for Kerr Stuart locos. Link to post Share on other sites More sharing options...
Giles Posted November 22, 2022 Author Share Posted November 22, 2022 The pony truck has been a concern..... the real thing is a Bissell truck pivoted under the front of the Ashland. This of course interferes with any motor/gearbox solution - motor being in the firebox. The solution is to use a radial truck I think........ Link to post Share on other sites More sharing options...
Giles Posted November 27, 2022 Author Share Posted November 27, 2022 And printed. 14 5 Link to post Share on other sites More sharing options...
Giles Posted December 3, 2022 Author Share Posted December 3, 2022 And cylinders 6 7 Link to post Share on other sites More sharing options...
Giles Posted December 12, 2022 Author Share Posted December 12, 2022 (edited) I'm having an extremely hard time with this post-Covid issue at the moment, but one of the few things I'm able to do is draw and light modelling. I've been working on the high boiler (original height) version, and printed off a modified cab, boiler unit and a newly drawn back with buffer beam. Shown above is the reverser in situ. You can see how slim the back sheet is. The platework is 0.5mm, plus angle. Extremely thin for a print of that size The detail and surface has come out very well - it hasn't been cleaned up in any way - although the reverse side has had all the support marks filed off. I consider this a reasonably fine model, to be handled as such. It is strong enough and resilient enough by that criteria, but not resilient enough for 'toy' type handling. Indeed I've already accidently dropped both these components accidentally without damage. Edited December 12, 2022 by Giles 11 3 1 Link to post Share on other sites More sharing options...
Quarryscapes Posted December 12, 2022 Share Posted December 12, 2022 This is a truly stunning bit of modern modelling Giles 1 Link to post Share on other sites More sharing options...
Giles Posted December 13, 2022 Author Share Posted December 13, 2022 Thank you! It's a learning curve I'm very much enjoying, and I have been stunned as to how well an affordable machine can perform (I have a Mars 2 Pro). I think you define it rather well. Modern Modelling sums it up quite well I think. A printer is just another extremely versatile machine tool. Two years ago I was struggling to draw an accurate cube in 3D. It's great that one is able to learn and progress. 1 1 Link to post Share on other sites More sharing options...
KeithHC Posted December 13, 2022 Share Posted December 13, 2022 I agree with the steep learning curve. I have an FDM printer and like you a simple item to start took ages. So far the most practical item I have made is a trolley coin. However like you I am slowly(very) getting to grips with design spark. Once I have it mastered I will then look at getting a resin printer. I have toyed with doing models of the various FR England engines. Keith Link to post Share on other sites More sharing options...
Giles Posted December 13, 2022 Author Share Posted December 13, 2022 4 Link to post Share on other sites More sharing options...
Giles Posted December 17, 2022 Author Share Posted December 17, 2022 Most of the drawing for printing is done now - it's certainly been a couple of hundred hours or more, with variations and modifications. There are still a few small things to be done. This is for an 0-14 (outside frame) version. when the gauge got bigger, the loco got inside frames, so I shall need to make versions for that as well. Why? Paul of EDM models is kindly looking at producing these for sale. Wrightlines produced the Corris/Talyllyn version with the dropped footplate, but that's not been available for some time, so this original type may be welcome. (Also to be produced are the working wooden tipper wagons in 4mm and 7mm) 4mm (009) working side tippers 7mm working wooden side tippers 13 2 Link to post Share on other sites More sharing options...
Giles Posted December 20, 2022 Author Share Posted December 20, 2022 This is a one-piece print, which shows promise. It was obviously missing two supports from the back of the cab roof, whose sides sagged slightly. That has been sorted now though. 7 2 Link to post Share on other sites More sharing options...
Night Train Posted December 27, 2022 Share Posted December 27, 2022 On 27/11/2022 at 08:36, Giles said: And printed. Is this the raw material as printed? It has a surprisingly "metallic" look to it. It is also devoid of the "layer lines" often seen in printed items. I am very impressed by the finish you have managed. 1 Link to post Share on other sites More sharing options...
Giles Posted December 27, 2022 Author Share Posted December 27, 2022 Thank you - I gave it a spray with black primer, but otherwise untouched. I print it at a very fine resolution which takes forever, but pays off in finish. 2 Link to post Share on other sites More sharing options...
Giles Posted January 5, 2023 Author Share Posted January 5, 2023 A chassis, CNCd on the Stepcraft, and silver soldered together.... With slide bars fitted, and cylinders just plugged in 12 Link to post Share on other sites More sharing options...
PaulaDoesTrains Posted January 5, 2023 Share Posted January 5, 2023 That's very nice @Giles What thickness brass did you use for the chassis? Link to post Share on other sites More sharing options...
Giles Posted January 5, 2023 Author Share Posted January 5, 2023 It's around 0.55mm nickel silver. (Blind bored 0.2mm for the rivet detail and embossed) 1 Link to post Share on other sites More sharing options...
Ruston Posted January 8, 2023 Share Posted January 8, 2023 Lovely work, Giles. I do like a Tattoo. I have fired and driven Stanhope several times. Perhaps you could do a Skylark, next? Link to post Share on other sites More sharing options...
RMweb Premium DLT Posted January 8, 2023 RMweb Premium Share Posted January 8, 2023 Thats phenomenal Giles, Link to post Share on other sites More sharing options...
Giles Posted January 19, 2023 Author Share Posted January 19, 2023 6 4 Link to post Share on other sites More sharing options...
Giles Posted January 22, 2023 Author Share Posted January 22, 2023 The new cab back in place, but not fixed....... also the battery is stuffed in the boiler, and I'm trying to get my head round the wiring. I'm not sure whether these cylindrical batteries have built in protection circuitry (it's not visible If they do) - so I've got separate little boards to protect against over charging and discharge, which fit in the bunker. Should the battery really need replacing, it can be withdrawn through the hole in the cab back sheet (So long as it hasn't swollen....) 9 1 1 2 Link to post Share on other sites More sharing options...
Giles Posted January 28, 2023 Author Share Posted January 28, 2023 (edited) So far so good on the new battery! I've now completed (I think!) the plumbing - injector for the fireman's side, and axle driven punp for the driver's side (plumbing, not the actual pump - there are things in the way....) I think I'm really down to the valve gear now, and waiting for the postman for various bits to do that, as I do have a cunning plan. Nameplates and builders plates orderd from the usual suspects. Meanwhilst it still looks like this Edited January 28, 2023 by Giles 12 Link to post Share on other sites More sharing options...
Giles Posted February 7, 2023 Author Share Posted February 7, 2023 Tattoo basically complete, radio controlled. 4 2 2 Link to post Share on other sites More sharing options...
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