RMweb Gold Mikkel Posted October 4, 2021 RMweb Gold Share Posted October 4, 2021 I had missed this thread. An unusual and interesting build, especially as it's a modification/rebuild of a kit - that always seems to make things harder (rather than easier), and so a nice challenge. Very cleverly solved and executed, I think. Coupled up to Duncan's 3D printed stock this will look the business (but I'm getting ahead of myself, must summon a bit of perthyans). 1 Link to post Share on other sites More sharing options...
garethashenden Posted October 10, 2021 Author Share Posted October 10, 2021 Having spent the summer doing other things, mostly in the shape of a Jaguar XJ-S, I have returned to the Buffalo project. I gave the boiler/saddle tank a coat of etch primer a couple of days ago. Last night I had a truly riveting evening with some Micro-Mark rivet transfers. 8 5 Link to post Share on other sites More sharing options...
Adam Posted October 10, 2021 Share Posted October 10, 2021 That's really coming on nicely, Gareth. I take it the sandboxes are 3D printed? And does the same apply to the wheels? Adam Link to post Share on other sites More sharing options...
garethashenden Posted October 10, 2021 Author Share Posted October 10, 2021 7 hours ago, Adam said: That's really coming on nicely, Gareth. I take it the sandboxes are 3D printed? And does the same apply to the wheels? Adam Yes, the sandboxes and wheel centers were 3D printed. 1 Link to post Share on other sites More sharing options...
garethashenden Posted October 25, 2021 Author Share Posted October 25, 2021 Its amazing how a chimney makes an engine come alive! This one I turned from copper rod this afternoon. The upper rim should be copper, so it seemed like the easy thing to do. The flare at the bottom still needs work, particularly on the other side. 6 3 Link to post Share on other sites More sharing options...
drduncan Posted October 26, 2021 Share Posted October 26, 2021 That's looking extremely good! Can you do one for my 3521 st, 3521t, Hawthorn 2-4-0st and sundry other BG locos? D Link to post Share on other sites More sharing options...
eagleeyemark Posted October 26, 2021 Share Posted October 26, 2021 On 10/10/2021 at 23:04, garethashenden said: "Last night I had a truly riveting evening with some Micro-Mark rivet transfers" Oh, I do so love those and the Archer Fine Transfers resin decals. Link to post Share on other sites More sharing options...
garethashenden Posted November 14, 2021 Author Share Posted November 14, 2021 I have fitted pickups. I find it very tempting to paint it now, but I wanted to test its operation before I mess it up with paint. Its got a slight hesitation at slow speed that I need to sort out, and its a bit growly as well. But overall I'm pleased. https://www.youtube.com/watch?v=yHq5UfxjzzE 4 Link to post Share on other sites More sharing options...
drduncan Posted November 14, 2021 Share Posted November 14, 2021 Have you got a rolling road you can run it on for 30-45 mins each way to see if it all settles down? D Link to post Share on other sites More sharing options...
RMweb Gold Regularity Posted November 15, 2021 RMweb Gold Share Posted November 15, 2021 Is the worm wheel fixed with a grub screw? From the pattern of the hesitancy and the noise, it could be very slightly off centre because of this. Link to post Share on other sites More sharing options...
garethashenden Posted November 15, 2021 Author Share Posted November 15, 2021 2 hours ago, Regularity said: Is the worm wheel fixed with a grub screw? From the pattern of the hesitancy and the noise, it could be very slightly off centre because of this. No, it’s a press fit. Or maybe it was a press fit and is now a locktite fit. Either way, no grub screw. I think the reduction ratio is too low, the motor isn’t turning fast enough at low speeds. I think the best course of action would be a different gearbox. Link to post Share on other sites More sharing options...
garethashenden Posted November 16, 2021 Author Share Posted November 16, 2021 I have found the source of the hesitation! It is, as I feared, the crank axle that is at fault. One of the solder joints on the crank has failed. Between the web and the pin on the right hand side. Probably not soldered well enough initially. Will need to disassemble, clean, and resolder it. It will be interesting to see if the 3d printed wheels can survive being removed and reinstalled on the axles or if I'll need to print another set. 4 Link to post Share on other sites More sharing options...
garethashenden Posted November 16, 2021 Author Share Posted November 16, 2021 Well that escalated quickly! Actually broken in two places. 6 Link to post Share on other sites More sharing options...
garethashenden Posted January 25, 2022 Author Share Posted January 25, 2022 (edited) I have constructed a new crank axle. It’s much sturdier and the mechanism runs well. I also replaced the gearbox. 54:1 is now 120:1 with the expected improvement in slow speed performance. I have reworked the brakes in a way that allows them to be installed or removed as a unit, an idea I borrowed from Will L. on the Scalefour forum. The handrails have been added, although not photographed. The final thing for this update, that I’m feeling rather pleased with, is the injector. I haven’t been able to find anything like it commercially, so I had to fabricate it. The first attempt was about 50% too big. This one looks about right though. I’m using some London Road castings for the bit that goes into the boiler up front. Just need to make the other side now… Edited January 25, 2022 by garethashenden 5 3 Link to post Share on other sites More sharing options...
garethashenden Posted March 26, 2023 Author Share Posted March 26, 2023 I have, I think, finished. 6 6 5 Link to post Share on other sites More sharing options...
drduncan Posted March 26, 2023 Share Posted March 26, 2023 Very well done - I must get the track panels properly down so there is something for it to run on! D Link to post Share on other sites More sharing options...
RMweb Premium Annie Posted March 26, 2023 RMweb Premium Share Posted March 26, 2023 1 hour ago, garethashenden said: I have, I think, finished. Now there's sight to soothe sore eyes. 1 Link to post Share on other sites More sharing options...
drduncan Posted April 1, 2023 Share Posted April 1, 2023 So now that there is a gap in your broad gauge workbench, what will be next - a scratch built SDR 4-4-0T? You surely won't be using the time you've gained on yet more LNWR junk stuff.... D Link to post Share on other sites More sharing options...
garethashenden Posted April 1, 2023 Author Share Posted April 1, 2023 2 hours ago, drduncan said: So now that there is a gap in your broad gauge workbench, what will be next - a scratch built SDR 4-4-0T? You surely won't be using the time you've gained on yet more LNWR junk stuff.... D Sure! Why not? That can be the next broad gauge locomotive I build. I do have a lot on at the moment, so the realistic completion date might be 2075. Is that ok? 1 Link to post Share on other sites More sharing options...
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