RMweb Gold Harlequin Posted June 30, 2023 RMweb Gold Share Posted June 30, 2023 The problem with the crane jib is that all the members can be seen from all sides...! 4 Link to post Share on other sites More sharing options...
RMweb Gold chuffinghell Posted June 30, 2023 RMweb Gold Share Posted June 30, 2023 5 minutes ago, Andy Keane said: These sorts of tricks will help but remember even the front will be only 0.67mm wide. So I think it would need to be thicker in both directions. Also all the L sections will probably end up as square sections. Will that matter? I am no expert on printers, though I can drive CAD. The flange and web thickness of the channel on my Pooley is 0.4mm It's all about compromise with modelling........but that's just my take on it Link to post Share on other sites More sharing options...
RMweb Premium Andy Keane Posted June 30, 2023 Author RMweb Premium Share Posted June 30, 2023 Well I will have a go at thickening various bits up and we can see what the CAD looks like and then maybe Phil or indeed Chris could do a test print? 1 Link to post Share on other sites More sharing options...
RMweb Premium Andy Keane Posted June 30, 2023 Author RMweb Premium Share Posted June 30, 2023 When I start to thicken things up it starts to look like this: 1 1 Link to post Share on other sites More sharing options...
RMweb Gold chuffinghell Posted June 30, 2023 RMweb Gold Share Posted June 30, 2023 Is that Solidworks by any chance? Would thickening them mid-plane look better? Link to post Share on other sites More sharing options...
RMweb Premium Andy Keane Posted June 30, 2023 Author RMweb Premium Share Posted June 30, 2023 30 minutes ago, chuffinghell said: Would thickening them mid-plane look better? Unfortunately not 1 Link to post Share on other sites More sharing options...
RMweb Premium Neal Ball Posted June 30, 2023 RMweb Premium Share Posted June 30, 2023 2 hours ago, Andy Keane said: When I start to thicken things up it starts to look like this: Looks terrific to me... but will it print? Link to post Share on other sites More sharing options...
RMweb Premium Andy Keane Posted June 30, 2023 Author RMweb Premium Share Posted June 30, 2023 (edited) A side etch would look like this. There would be top and bottom and the other side with small tabs to solder them together. Then one could "stick" bits on to decorate such as strips or L section brass etc. The top bit is harder because the four main beams are all at odd angles and have two bends in each one. But being thicker maybe we could print just that bit? Edited June 30, 2023 by Andy Keane 1 Link to post Share on other sites More sharing options...
RMweb Premium Andy Keane Posted June 30, 2023 Author RMweb Premium Share Posted June 30, 2023 (edited) So when we put three etches together we get this using 0.5mm thick sheet. Not as nice as the full 3D CAD but it still looks a lot like a crane jib. As to how much anyone would want to add decoration may be up to the patience of the modeller? Edited June 30, 2023 by Andy Keane 5 Link to post Share on other sites More sharing options...
RMweb Premium Andy Keane Posted July 1, 2023 Author RMweb Premium Share Posted July 1, 2023 And if we ever get that far we could start to add more detail like river heads! 2 Link to post Share on other sites More sharing options...
RMweb Premium Neal Ball Posted July 1, 2023 RMweb Premium Share Posted July 1, 2023 10 hours ago, Andy Keane said: So when we put three etches together we get this using 0.5mm thick sheet. Not as nice as the full 3D CAD but it still looks a lot like a crane jib. As to how much anyone would want to add decoration may be up to the patience of the modeller? From normal viewing distance, with a 3D ringed top, I still think that looks very good. 1 Link to post Share on other sites More sharing options...
RMweb Premium Andy Keane Posted July 1, 2023 Author RMweb Premium Share Posted July 1, 2023 24 minutes ago, Neal Ball said: From normal viewing distance, with a 3D ringed top, I still think that looks very good. yes and you can buy very fine L section brass and simply glue or solder strips on the various faces to make a more 3D and indeed stronger result. Definitely much more robust that a 3D print in resin could be. So I am inclined to print the jib head and join that to a brass main span and then on to a printed base. This would make the whole thing more robust and still allow quite a lot of detail. 3 Link to post Share on other sites More sharing options...
RMweb Premium Andy Keane Posted July 1, 2023 Author RMweb Premium Share Posted July 1, 2023 (edited) Fully detail CAD model, now including the rivets! Edited July 1, 2023 by Andy Keane 1 1 3 1 Link to post Share on other sites More sharing options...
RMweb Premium Andy Keane Posted July 1, 2023 Author RMweb Premium Share Posted July 1, 2023 (edited) This is the version chunked up for printing - are people still happy? Andy Edited July 1, 2023 by Andy Keane 3 1 Link to post Share on other sites More sharing options...
RMweb Premium Neal Ball Posted July 1, 2023 RMweb Premium Share Posted July 1, 2023 8 minutes ago, Andy Keane said: This is the version chunked up for printing - are people still happy? Andy Struggling to see the difference. Link to post Share on other sites More sharing options...
RMweb Premium Andy Keane Posted July 1, 2023 Author RMweb Premium Share Posted July 1, 2023 17 minutes ago, Neal Ball said: Struggling to see the difference. Good - that was the intention. 2 Link to post Share on other sites More sharing options...
BenL Posted July 1, 2023 Share Posted July 1, 2023 2 hours ago, Andy Keane said: This is the version chunked up for printing - are people still happy? Andy Looks fantastic Andy, amazing work! 1 Link to post Share on other sites More sharing options...
RMweb Gold The Stationmaster Posted July 1, 2023 RMweb Gold Share Posted July 1, 2023 On 27/06/2023 at 12:33, Andy Keane said: @The Stationmaster Mike can you confirm the spacing between signal wire support posts was around 20 feet? I seem to remember either you or Paul said so but cannot recall where. thanks andy As mentioned in PM my 1930s signal engineering text book says the following - Stakes for two wires or less - spacing is 10 yards More than 2 wires the spacing is 8 yards The 1952 and 1980 editions of the IRSE 'green' booklet simply say 'suitable intervals' and no doubt company/BR Region practice varied. Photos and sleeper counts are probab;y the best guide. 1 3 Link to post Share on other sites More sharing options...
Modelu Chris Posted July 3, 2023 Share Posted July 3, 2023 Very nice CAD work! I see we were tagged in the thread but it looks like you have it all sorted. I look forward to seeing the end result. Link to post Share on other sites More sharing options...
RMweb Premium Andy Keane Posted July 3, 2023 Author RMweb Premium Share Posted July 3, 2023 (edited) 49 minutes ago, Modelu Chris said: Very nice CAD work! I see we were tagged in the thread but it looks like you have it all sorted. I look forward to seeing the end result. Chris, @Harlequin has made some trial prints of the crane jib but we may need your help for production if you are willing? Regards Andy Edited July 3, 2023 by Andy Keane Link to post Share on other sites More sharing options...
Modelu Chris Posted July 3, 2023 Share Posted July 3, 2023 Feel free to give me a PM when you need some help. Kind regards, Chris 1 1 Link to post Share on other sites More sharing options...
RMweb Premium Andy Keane Posted July 3, 2023 Author RMweb Premium Share Posted July 3, 2023 Alongside work on the crane I am continuing to potter at the various buildings in the yard at Helston. The Gweek Company had a ramshackle collection of buildings there after WWII though not sure of their origins. I am planning to try and model these as they might have looked when first built. The full structure seems to have consisted of three coal staithes with a corrugated roof, a timber storage building and an office, all separately built with differing roof lines, but hard up against each other. This is the start of my framework for the covered coal staithes (the post in the lower RH corner is just propped there while I size it all up). It is not obvious how high to make the roof, and indeed a roof over a coal staithe seems to be something of a luxury. This effort is judged from the two photos I have and by placing a wagon there, but even then the long beam is about nine feet above the ground at full scale, which seems a tad high. I suppose if any lower it would not be easy to shovel coal off wagons into the staithes. 7 Link to post Share on other sites More sharing options...
RMweb Premium Andy Keane Posted July 4, 2023 Author RMweb Premium Share Posted July 4, 2023 I have mocked up the corrugated bit of the Gweek buildings in CAD like this: But I am not sure what windows or doors to add track side - all thoughts most welcome Andy 2 Link to post Share on other sites More sharing options...
RMweb Premium Andy Keane Posted July 4, 2023 Author RMweb Premium Share Posted July 4, 2023 (edited) I have just unpacked the garage and weigh bridge office as 3D printed by https://microworkshops.co.uk/ Amazing quality prints from my CAD. They will need painting and windows and doors adding but I am jolly pleased. The only issue is they end up looking very precise - I may have to "damage" the Gweek buildings as I am sure they were not so accurately made as the GWR ones. Edited July 4, 2023 by Andy Keane 8 Link to post Share on other sites More sharing options...
RMweb Premium Andy Keane Posted July 24, 2023 Author RMweb Premium Share Posted July 24, 2023 (edited) I have started painting some of the corrugated sheds on the Helston layout. These are 3D printed resin. The tiny shed was a commercial item while they garage and weighbridge are my designs. I have the Gweek Co Ltd shed under manufacture along with some doors for the garage. My next problem is how to do the rust on these. I have read about methods where hairspray is placed over a base rust coat, followed by top paint, followed by small amounts of water to loosen patches to let the rust show through. I have also seen a similar method with masking fluid rather than hairspray used to separate base rust and top colour. Does anyone have any views? Does @Gilbert have a cunning trick for this? These photos show GWR light stone walls and red-rust base coats. Top photo with flash, bottom one under room lights - amazing the colour difference. Andy Edited July 24, 2023 by Andy Keane 5 3 Link to post Share on other sites More sharing options...
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