jonhall Posted January 30, 2011 Share Posted January 30, 2011 So instead of working on the scratchbuiltTransfesa van, or the 9 UKF palvans that are already on my workbench, I decide to start something else, worse that its not even a wagon, but a loco, and worse still its a kettle. I realised whilst demonstrating resin casting at the StAlbans show, that I would really have to make a few new moulds before I get to Ally Pally, and that I don't really have anything teribly suitable as a master at the moment... I've also had drawings for the S&D Sentinal knocking about for some tyears after a fellow club member showed an interest in building one, so this week I've been doing a bit of pattern making. Jon Link to post Share on other sites More sharing options...
halfwit Posted January 30, 2011 Share Posted January 30, 2011 Looks good Jon. As your preparing a resin mould is this going to be available for sale? Link to post Share on other sites More sharing options...
Poor Old Bruce Posted January 30, 2011 Share Posted January 30, 2011 I'll take one if available Link to post Share on other sites More sharing options...
Pugsley Posted January 30, 2011 Share Posted January 30, 2011 I decide to start something else, worse that its not even a wagon, but a loco, and worse still its a kettle. Dear oh dear, I think you need to report for some corrective therapy immediately. The pattern looks good, I think it'll be an interesting one to mould. Link to post Share on other sites More sharing options...
jonhall Posted February 1, 2011 Author Share Posted February 1, 2011 Looks good Jon. As your preparing a resin mould is this going to be available for sale? It won't be available in any formal way - but I will probably sell the results of any demonstrations on the day they are manufactured - assuming of course I actually get around to both finishing the master and then making a mould off it (and that the part turns out to be easy to cast). I don't want the aggro of doing this comercially. As it is I've realised I don't have any rubber in stock, so that will mean a trip to Guildford to get it. Jon Link to post Share on other sites More sharing options...
RMweb Premium cctransuk Posted February 1, 2011 RMweb Premium Share Posted February 1, 2011 Roger Slade (see below), apparently has an imminent fully motorised kit in 4mm. scale. The test build images were supplied some time ago - the final product may well differ. Regards, John Isherwood. CSP Model Marketing (Roger Slade) Maple Cottage 15 Dorchester Road Stratton Dorset DT2 9RU tel: 01305 751 544 e-mail: cspmodels@waitrose.com Link to post Share on other sites More sharing options...
jonhall Posted June 26, 2012 Author Share Posted June 26, 2012 Where have the last 18 months gone... still at last there has been some progress - can you guess what it is yet? Jon A watched mould never sets, so I've posted this to keep myself occupied, hopefully another update is only 45 minutes away. Link to post Share on other sites More sharing options...
jonhall Posted June 26, 2012 Author Share Posted June 26, 2012 As promised I need to clean the mould up slightly, but otherwise I'm fairly pleased. jon Link to post Share on other sites More sharing options...
jonhall Posted June 28, 2012 Author Share Posted June 28, 2012 Just a little progess, I've cast up another bonnet, as the first one out of the mould had a couple of flaps of stray rubber that blocked some of the detail. I've then cleaned up the cab casting, and attached the cast bufferbeam (then rather spoilt it by drilling the holes for buffers off-center) and added the bottom of the rear cab sheet from plasticard. The lower part of the cab at the back cuts back in, and I couldn't cast it in situ, so I took the view that this was going to be the easiest bit to fabricate. I might give it a quick coat of photographic grey tomorrow to make it easier to see. Jon Link to post Share on other sites More sharing options...
jonhall Posted June 29, 2012 Author Share Posted June 29, 2012 My last few photos for the time being - this isn't really my era, or area of interest, and as there hasn't been much feedback to this thread (which I'll admit surprises me) I'll pass on a couple of sets of castings to the club member that first showed an interest, and put this one to one side and carry on with the wagons. J Link to post Share on other sites More sharing options...
buffalo Posted June 29, 2012 Share Posted June 29, 2012 It looks like you've done a good job of capturing the shape, Jon. I am also surprised at the lack of feedback here given the interest in this prototype that has been shown in one or two earlier threads. Perhaps part of the answer lies in John Isherwood's post earlier, that is the availability since late last year of the CSP kit. I've been building one of these and showing progress on my blog. Whilst the unusual body shape is a major part of getting a model to look right, there are other highly visible features that also need to be included. For example, the rather complex spring mountings and the boiler inside the cab. Any thoughts on how you might tackle these? Nick Link to post Share on other sites More sharing options...
jonhall Posted June 29, 2012 Author Share Posted June 29, 2012 Whilst the unusual body shape is a major part of getting a model to look right, there are other highly visible features that also need to be included. For example, the rather complex spring mountings and the boiler inside the cab. Any thoughts on how you might tackle these? The drawbacks if I were to 'engineer' the boiler or the sideframes into the resin is the same - what power source is to be used? Mine is quite likely to actually have an 'UndergrounD Ernie' inspection trolly as the power - which is actually about the right wheelbase, although the wheels are rather small (any suggestions about getting bigger wheels are welcome). Even the smallest Tenshodo has a rather longer wheebase than the prototype, and if I were to cast a compete chassis-side/springs/sandboxes, there would be the risk that the wheelbase that I choose would be different from a widely available bogie that others might want to use. I could either attach the frames/springs/sandboxes to the footplate, or I could do them as two flat casts, which would have an advantage of allowing them to be moved out to give space for the wider guages, although I suspect anyone that might want a P4 one would go for the etched kit, I think that the boiler would be fairly straightforward, using a bit of plastic tubing - I did wonder about including a boiler into the cab casting, but as well as the risk that the motor might need to intrude into the space, there is a more practical problem, because it is cast upside down, I suspected that what will become the base of the boiler would tend to collect air bubbles. Jon Link to post Share on other sites More sharing options...
N15class Posted June 29, 2012 Share Posted June 29, 2012 I have just found this thread. Very interesting it is too. I have often thought about doing a bit of resin casting, your piece here makes me think it may well be worth doing. Well done the finished articals look very good. Could you let me know what rubber you use for the mould, I used some stuff from Teranti in Theale years ago for whitemetal casting. Also the resin many thanks Link to post Share on other sites More sharing options...
halfwit Posted June 30, 2012 Share Posted June 30, 2012 If there was a spare set of castings going I'd certainly be interested. Link to post Share on other sites More sharing options...
jonhall Posted June 30, 2012 Author Share Posted June 30, 2012 I have just found this thread. Very interesting it is too. I have often thought about doing a bit of resin casting, your piece here makes me think it may well be worth doing. Well done the finished articals look very good. Could you let me know what rubber you use for the mould, I used some stuff from Teranti in Theale years ago for whitemetal casting. Also the resin many thanks The rubber is SIlastic 3481, and the resin is Easyflo 60 both from Notcutt http://www.notcutt.co.uk/ Jon Link to post Share on other sites More sharing options...
N15class Posted June 30, 2012 Share Posted June 30, 2012 The rubber is SIlastic 3481, and the resin is Easyflo 60 both from Notcutt http://www.notcutt.co.uk/ Jon Thanks for that. I will see if there are equivalents here, cos 60% import duty hurts. Link to post Share on other sites More sharing options...
robmills Posted June 30, 2012 Share Posted June 30, 2012 Hi Jon, I would also really like a set of castings, if available. Link to post Share on other sites More sharing options...
jonhall Posted January 9, 2013 Author Share Posted January 9, 2013 If anyone is interested in resin casting, I shall be demonstrating it at StAlbans this coming weekend. Jon Link to post Share on other sites More sharing options...
jonhall Posted February 9, 2013 Author Share Posted February 9, 2013 So another six months, and I find that whatever I'm supposed to be doing is even more boring than adding the handrails to my sentinal - who knew that such a small loco would need so many handrail knobs! I've used a random packet of W&H handrail knobds and they are a bit long, but nevermind. Some random buffers and another coat of primer (after searching my aerosol stockpile it appears I don't have any gloss black - can I be bothered to cycle to Kingston in the rain - I don't think so). Jon Link to post Share on other sites More sharing options...
Darwinian Posted February 10, 2013 Share Posted February 10, 2013 That's really most impressive. So Lego do have a prototype for the brick knobs on the roofs of their loco models Link to post Share on other sites More sharing options...
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