mbrown
Elder Statesman
Posts: 1,795
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Post by mbrown on Nov 2, 2020 8:27:27 GMT
Got it Pete. I see your point...
Just another example of how an extra cylinder adds more than 50% more complication!
And I know it's no good saying "who would know?" - when you yourself know, things like that stick out like sore thumbs...
Malcolm
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Post by Deleted on Nov 5, 2020 10:55:32 GMT
Not a blog update as such, I'll add this picture to the last update where it belongs but show it here so it's not missed by you guys. I have now fabricated the R/H draincock linkage and made the drop pipes, I'll shorten these a little later to be closer to the prototype, the nuts are a little large which adds to the oversized look so I'll also shorten these. I'm pleased with how they look compared to full size, you'll note that I have only placed one relief valve roughly in position for effect. I'll leave these off until final assembly as they can't be fitted until the cladding is in place. I may also thin down the main link between the two draincocks to be closer to scale, if so I'll only do this on the outside cylinders, the middle was deliberately made larger as it's not as easily accessible once the model is completed and can't be seen. I am also going to add ferrules to the cab end of the Bowden cable (the front is already held by ferrules) to remove the possibility of the cable slipping while operating all three of the cylinder draincocks, this is something that I noted during setting up and ironing out restricted areas until it operated smoothly, better safe than sorry. On this note, I changed one of the cables as it had become a little frayed on the cab end, this was a worthwhile exercise as it proved that the cables can be easily changed in service. So on final assembly, the cables will be set and held by the two 10 BA bolts and then have ferrules attached to ensure the cables can't slip. I won't do this yet as the cab needs to be removed again which means disassembling the handle which may change the tautness of the cables, so this will be another of those many final jobs to be done. A picture to show how things are looking....  Oh and just to add that the chassis is now sitting level...  Pete |
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timb
Statesman
Posts: 512 
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Post by timb on Nov 5, 2020 11:05:29 GMT
Gougeous Gg, but I think the coupling chain at the front is a bit out of scale!
Tim
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Post by Deleted on Nov 5, 2020 11:20:51 GMT
Gougeous Gg, but I think the coupling chain at the front is a bit out of scale! Tim haha.. are you sure?... |
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Post by silverfox on Nov 5, 2020 11:23:46 GMT
Tim
Peter is using a very wide angle lens which distorts items close up!!
I know this as he has shown me the Hornby model he is taking all the pictures of. The Chain on the right is of his wifes charm bracelet
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Post by Deleted on Nov 5, 2020 11:35:06 GMT
Tim Peter is using a very wide angle lens which distorts items close up!! I know this as he has shown me the Hornby model he is taking all the pictures of. The Chain on the right is of his wifes charm bracelet Ron.. you spoilsport, my secret is now revealed... all I'm really doing each day is sitting here sipping tea... Actually, I do own 3 '00' gauge 4472's...I may dig one out, take a picture and shout..' Finished'... |
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mbrown
Elder Statesman
Posts: 1,795
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Post by mbrown on Nov 5, 2020 12:17:57 GMT
I am just fascinated that Pete keeps gauge plate, brass, copper and biscuits in one tin... !
Malcolm
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Post by Deleted on Nov 5, 2020 12:40:55 GMT
I am just fascinated that Pete keeps gauge plate, brass, copper and biscuits in one tin... ! Malcolm haha... I stole my wife's old kitchen set when she bought a new one, the tins are perfect... as for the mix of metals, that's easy... I can see at first glance what I'm looking for, that is brass, copper and gauge plate look so different to each other.. keeping the stainless and silver steel separated is a nightmare, a magnet doesn't always work.. Pete |
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Post by David on Nov 9, 2020 11:20:10 GMT
Whatever direction the draincocks open, it's looking really good. Hellishly complicated, but really good :)
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Post by Deleted on Nov 14, 2020 17:59:01 GMT
A little something in the pipeline, that well-known fellow Model Engineer and cohort in doing the CAD work for me John Baguley (baggo) has been busy drawing up the reverser stand for me...🙂 Drawing is now at Malcolm's for cutting and I have printed off some PDF files that John kindly sent me to check that all was good. You can see for yourselves how well the parts fit. When cut in steel there will be different thicknesses involved as per Don's. When comparing to full size the height looks just right. It will be a while before you see this assembled in steel but this should at least give a taste of what's to come, you may recall, that I already have the brass etch for the cut-off indicator which will be fully functional. In other news, the cylinder relief valves are nearly complete, in fact, I'm going to spend this evening in front of the TV doing the final filing/polishing of the parts ready for assembly. All being well, beginning of next week I'll post the latest blog update covering both their fabrication and hopefully their successful testing/setting too... fingers crossed...🙂 To conclude, a big thank you to John for his excellent work.  Pete |
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Post by coniston on Nov 14, 2020 21:00:01 GMT
That is again the alternative CAD (Cardboard Aided Design), looks a good job Pete, I might have to have a chat with MEL about a set for mine.
Chris D
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Post by Deleted on Nov 14, 2020 21:53:42 GMT
That is again the alternative CAD (Cardboard Aided Design), looks a good job Pete, I might have to have a chat with MEL about a set for mine. Chris D Hi Chris That's one of the great things about Malcolm's service, once he has the drawing it's added to his massive list...better still, he can reproduce it for anyone and in any scale... Pete |
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Post by Deleted on Nov 19, 2020 22:10:08 GMT
Hi guys The latest blog entry covers the cylinder relief valves and them being set at 110 PSi.. 10% above boiler working pressure. I have recorded another video which I think maybe a bit long-winded while I played around getting the first valve set but at least it shows what was involved. The other 5 valves were done very quickly. I will tidy up the front adjusting screws later, I may even change a few cosmetics but for now, the valves work which was the important thing for this particular exercise.  4472flyingscotsman.co.uk/cylinder-relief-valves/Pete |
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Post by Deleted on Nov 27, 2020 18:35:50 GMT
Hi guys I've changed a few parts on the relief valves, as mentioned last time, I planned to tidy up the adjusting screws a little, well I did a little more than that after doing some long pressure tests. Not much changed but details can be found on the same link as last time. I could probably remove the protruding part of the adjuster screw completely to make it very much as per prototype but think it prudent to leave alone for now.  Pete |
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Post by theflyingscotsman on Nov 29, 2020 22:29:55 GMT
ive said it before Pete, its beautiful, although from what you have said itl be a while away till steam yet but still a day to look forward to. Well done mate!!!
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Post by Deleted on Nov 29, 2020 23:12:48 GMT
Thank's Lee... I do wonder just how long it will be before she steams...perhaps not as long as I thought. Still some years but I have a lot of parts boxed up ready to fit now, some painted. I'm currently making bolts/nuts for the slide bars, getting them prepped to fit. Crossheads and outside connecting rods after that. Need to then get lots of gauge plate to complete the outstanding motion parts.Then I can look at getting the boiler and its associated parts ready to fit...exciting times ahead then. Funny you say 4472 has a way to go yet, I thought the same till recently when I updated the drawings, highlighting the parts finished...I think I have more sheets finished than not with the others nearly completed. Had an email tonight from Martin Evans, he also commented saying things look close to completion..perhaps if I can pick up the pace a little I may be very close by Feb 23.. an historic date. I'll leave it to you guys to work out what that is... Pete |
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Post by dhamblin on Nov 30, 2020 17:01:52 GMT
February 2023 must be achievable, surely? Certainly an appropriate date to aim for given significance for the real thing. The only known unknown (to quote a certain American), as you've noted previously, is a possible house move.
Mind you, the level of detail you are putting in certainly doesn't warrant rushing it to meet that date.
Regards,
Dan
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Post by Deleted on Nov 30, 2020 17:19:43 GMT
February 2023 must be achievable, surely? Certainly an appropriate date to aim for given significance for the real thing. The only known unknown (to quote a certain American), as you've noted previously, is a possible house move. Mind you, the level of detail you are putting in certainly doesn't warrant rushing it to meet that date. Regards, Dan Spot on Dan...It won't be finished 'per se' that soon but hopefully may look it externally. I will try to see if anything can be arranged with those in charge for a possible photo shoot with full size at that time. We shall see... Pete |
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Post by Jim on Nov 30, 2020 19:54:45 GMT
As long as you are enjoying the journey Pete the completion date will be when you get there.
You are in the process of completing a masterpiece of a working miniature of the prototype and I have no doubt Doncaster will be gazed at in awe and admiration
for generations to come.
Have a great Christmas and productive New Year.
Jim
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Post by Deleted on Nov 30, 2020 20:38:10 GMT
That's very kind of you Jim..as for the 'working' bit...jury is still out on that one my friend.... |
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