A Bit of a Slip Up…….

I have been continuing with the wiring of Glenmutchkin, but have hit a snag; one that I should have been ready for – the wiring of the slip,  I had been aware that a diamond crossing was a challenge to wire and I was suckered into thinking that the switches on a slip could over come the challenge,  Well I go that wrong…….!!

The basic problem is that there are a choice of two routes through a diamond crossing and each route requires the polarity of the crossings to be different.  The diagram below, which shows how a diamond crossing needs to be wired, should illustrate the problem.  The only solution to this is to power the crossing polarity by way of an approach turnout – if you really don’t have one to set the polarity with, then you are going to have to resort to some switches – but at least it will give you a good excuse to interlock the diamond crossing with some signals to remind you on which direction it is set!

Crossing Wiring

Hopefully this is clear that the crossings on the diamond crossing are activated by detecting the direction of the switch on the approach turnout.  If it is set for straight ahead, then a train can’t travel over the crossing and therefore the parallel line can so the polarity of the crossings are set accordingly.  Conversely, when the approach turnout is set to the branch, the line across the diamond can be used and the polarity is set to suit.

The principal with the diamond crossing needs to be heeded when the crossing is replaced with a single slip as I have, but it does get more complicated because the switch of the slip can also lead to a different route through the crossings.  The crossing to the left of the slip is the more straight forward as it is only activated by the approach turnout.  However the right hand crossing is more complicated as if the approach turnout is set for the branch then it always needs to be in the red polarity whereas if the approach turnout is set for the main, then it then needs to be controlled by the slips switch.

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Hopefully the diagram above shows how this works.

The irritation I have, in addition to having wired it up wrong already (!) is that the approach turnout is on a different board to the slip.  To reduce the number of wires crossing the boards, I have decided to simply use a duplicate point motor for the approach turnout located on the same board as the slip.  It is expensive but rather more simple than the additional wires.

 

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Togs, Trains and Slartibartfast’s Award

The interruption in fresh posts has been caused, in part, by a recent trip to Norway – a country with some particularly fine railways (why else would we go there – well actually there are a fairly good number of reasons!).

The trains (or Togs in Norwegian) start almost immediately – this is the rather brutal looking “airport express” – or flytoget in Norway.

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But the real trains are reserved for the Norwegian Intercity trains – this is the train engine for the Bergen Express:

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And the suburban stock looks like this (at Bergen – top and Voss – bottom)

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The Bergen line was the first of the highlights of the trips; the line initially skirts Oslo Fjords (lots of tunnels and no views) before winding through some very pretty farmland interspersed with lakes,

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As the line gets higher the landscape gets starts to get harsher and the gradient steepens (you can see it climbing up the mountain in the background in this view):

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By the time it gets near the top, the bulk of the line plunges into snow shelters – some 30 miles of them and there is even a station within one at the top.

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If the snow sheds weren’t a sufficient clue that they have a touch of bother with snow up on the line, the collection of (preserved in this case) snow blowers left you in no doubt:

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The other railway highlight of the trip was the Flam line which is a truly stupendous (if amazingly tourist) line.  It rises no less than 2,831ft in only 12.6 miles – it has a maximum gradient of 1:18 which is an appreciable gradient on foot, let alone a natural adhesion railway!  To deal with this level of gradient and fairly long trains, each train is top and tailed by a pair of locos, as can be seen.

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The extent of the gradient can be seen in this (slightly murky) view, the line right at the top is the line leaving the junction with the Bergen line at Myrdal, it can be seen in a snowshed in the middle and we are in a further snow shed only a short way further down the line.

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The line goes right down to sea level the surrounding land ceases to be quite so harsh and there is even a deep sea berth at the end of the sea fjord – convenient for cruise liners (of which Norway has rather more than its fair share!).

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The rather beefy electric locomotives (class E.18 I think) have a very modern feel to them but I rather preferred their predecessors the E.17 class as they felt so much more “continental”:

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Whilst that finished the railways for the trip, mention of Slartibartfast’s prize winning designs really does need mentioning.  For those of you who don’t know what I am going on about, Slartibartfast was a figment of Douglas Adams’ imagination.  Douglas Adams is the creator of The Hitchhikers Guide to the Galaxy and he was a Magrathean – a designer of planets.  His prize winning designs were the fjords of Norway – he was so well regarded he was going to be allowed to do the whole of Africa when earth MkII is recreated once it has been destroyed to make a bypass.

So here are a few fjord pictures just to go ohh and aghh to:

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It is fair to say, you can get a bit fjorded out as fabulous views are not really good enough when there are so many really fabulous and really really fabulous views out there!  I think old Slarti deserved his award, don’t you?

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EXPO-EM (Beer, Trains & Curry)

Whilst it is fair to say that one of the highlights of the weekend that OTCM have not mentioned – Oly’s ashen face on Sunday and his continuing insistence that he is never drinking again – here is a quick report on the trip to Expo EM.

The Model Railways of Oly Turner and Chris Matthews

It’s the morning after a show and people with any sense usually take the Monday off, not at OTCM, straight back to work. We are dedicated like that. As usual we were Portchullin Roadies, with the same mix of trains, beer and curry. It also had it’s usual pitfalls, mainly Marks ropey driving, dodgy wiring and last minute fixes.

With nothing working and her legs exposed and with opening 3 minutes away, Portchullin is being her typical self

Parking by Mark Tatlow

A Northern trade mark, rain and sun.

But it was all because deep in a dodgy council estate was Parlington liesure centre and EXPO-EM. Under the yellowy light and the sound of lashing rain (rain like only the north can do) was a selection of good layouts and great people.

First up is some photos of Andy Clayton’s mega lush Scottish stock for his forthcoming Queen Street posed…

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Making Louvered Chimneys

One of the most characteristic features of the Highland Railway’s locomotives for many years was the louvered chimney.  This was fitted to almost all of David Jones’ locomotives and although some lost them over their lives, most retained them until withdrawal.  Indeed this style of chimney can still be seen on the preserved Jones Goods which is presently in the Riverside Museum of Transport in Glasgow.

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There is debate as to the reason that these chimneys were fitted but it is generally considered that they sought to assist in the drafting of the fire on the downhill sections of the line.  There were many long descents on the line and regulator would be closed for such descents and thus the fire was not drafted by the exhaust from the cylinders.  The louvres would have allowed the passing air to pull on the fire to keep .

Clearly for such a characteristic feature of the line, it is important to model it well on my locos but I am not totally happy with the renditions that are available.  The whitemetal chimneys look too chunky and neither the cast brass (Lochgorm) or turned brass (Jidenco/Falcon Brass) have very distinct louvres.  I feel that they can be improved and this is how I go about doing so; in this case starting with the Lochgorm Models cast brass chimney.  Similarly, if you are turning your own chimney, the same situation arises,

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I started by some basic improvements to the chimney.  I found that my casting was not parallel down the shaft of the chimney, being fatter at the top, and also not particularly smooth.  I therefore turned it down a little on a drill with some needle files.  The casting sprue was not particularly central so to be able to turn the chimney it was first necessary to file this to get it more central.  Thereafter, I drilled out the chimney to 4.5mm diameter to its full depth on a pillar drill.  I am doing this partly for appearance but really because I intend to put sound speakers in the smokebox and it is necessary to leave routes for the sound to escape – the most authentic being to chimney!  Casting brass is very hard and this is no little task – it takes some time, lubricant and anyone in the house need to be able to tolerate a good amount of noise!

The Lochgorm Models cast chimney has a series of depressions to represent the louvres and these are what I felt needed improving.  I started this with a piercing saw with a fine (OOOO) slot at the top of the cast depressions.  This is cut across the whole width of the depressions and a little further beyond, ignoring where the pillars between the slots are.

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These are then given a chamfer slope with a needle file that has a blank face (to make sure it does not cut above the slot).  This also needs to be taken beyond either end of the intended louvres to avoid the impact of any taper.  The top three have been formed in the picture below, with the lowest still just the piercing saw cut.

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Once all have been formed, the next task is to undo all of the work by filling them in again!  All of the gaps are flooded with solder.  I used 145 solder as it would survive the reasonable temperatures that would be incurred in soldering it to the boiler but also be soft enough to carve out again.

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The louvres were then marked out, starting with the two vertical rows either side of the central pillar that must match the highest point of the flare.  Then with a knife, the solder infill between these is cut back out.  The knife can cut through the solder to cut it out but does it will not affect the brass, so the louvre is reformed.  I found that the technique was to initially cut it away and once a basic amount was removed the blade can be scraped side to side within the louvre to get a smooth surface.  This brings up burrs of solder at either side of the louvre which are then cut out.  This is what it looks like with the first two columns of louvres done – I found it best to do it like this as it was easier to get them vertical than by doing them in rows.

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You will find that you get through a fair few blades doing this as the most challenging part is getting the corners crisp (and the photography is very cruel in this regard!).  It is also easy to be a bit enthusiastic and accidentally cut pillar – if this happens, it can be reformed with a dab of solder and the process repeated until there is a neat row of four slots in four columns.

Once you are near to finished, a dusting of grey primer shows up any remaining inconsistencies and hopefully it looks something like this:.

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This process creates not only the slope of the louvre opening but also the dark shadow of the cavity.  In my view these features are necessary to capture the feel of the distinctive feature of the Highland Railway.  It takes around 2-3 hours to make each chimney and in I reckon it is worth the time and effort.

 

 

 

 

 

 

 

Princes Risborough North Box

As part of the Missenden Railway Modellers summer retreat, I was lucky enough to be invited to see the Princes Risborough North Box, which is now in the custody of the Chinnor and Princes Risborough Railway Association.

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The box had lain derelict for many years, since its closure in 1991.  Somewhat peculiarly, it was a break in by vandals during this period that potentially saved the box as it identified how seriously affected by water penetration and rot it was.  This lead to the preservation society being able to convince Network Rail to let them in to stabilise it and they feel that had this not have occurred, when the building’s distress subsequently became apparent to Network Rail they would have merely ripped it down.

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The box is substantial and is apparently the largest remaining GWR signal box in the country.  It originally controlled the north end of Princes Risborough station but its size was determined by the complicated junction at this end of the station with three branch lines splitting from the main-line to Bicester and beyond.  The branches it served were Aylesbury (still part of the national network), Oxford (closed in 1963) and Watlington (closed in 1957 but now reopened to Chinner as part of the preserved railway).  The Railway Clearing House map is below and just to prove the complexity the box diagram too!

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As would be imagined, there is a fairly extensive array of levers although in the various rationalisations that occurred through the GWR and BR eras have reduced the extent of these significantly.  The preservation association have, however, reinstated many of the missing levers even though they are not yet connected to anything.

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At present, the preservation society only have a temporary connection into the Princes Risborough bay platform but the intention will be to make this a permanent link onto their line, signalled via the box.  However, given that this will still only be one of the lines that the box formerly served, there will only be a limited amount of it in use.  Apparently the plan therefore will be to separate off the bulk of the box to create an interactive museum where visitors can play the part of a signalman.

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The treat for me (and many of the others on the visit) was to go into the frame room to take a look at the locking frame.  Although I had seen this in model form before, I had never seen a full sized locking frame – even though this is only a shadow of its former self as it only covers that proportion of the box that was in use at 1991, it is still very complicated as you can see.

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The Chiltern line is now really quite busy, far more so than when I used it to get to Solihull on business regularly.  In addition to the procession of class 168 DMUs, there were class 68s on the trains for Birmingham and Wrexham plus a pair of trips each day with class 66s on spoil trains from the Thames Tideway sewer project.

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And finally, this is what the box looked like in the days of steam.  This photograph was taken in 1960 by Christopher Bomken when he was still in his shorts – it even won him 2 shillings and sixpence in a school photographic competition.  Recognition at last Christopher it has made the interweb!

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Dia 51 Test Build – Part 2: Nearly There

I no longer affix roofs firmly to the body of my coaches as makes both the building and the painting much easier.  The downside of this is that there is the challenge of keeping the roof on tight without there being any visible joint between the two as this looks terrible.  The solution I now use is to clamp this to the floor with 10BA bolts by way of brackets as can be seen in the photograph below.

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As built, these coaches had full length step boards but they lost most of these through their life.  They were electric fitted from the outset.  The chassis below is close to finished except I have run out of vacuum cylinders so these will need to be added, along with the vacuum pipes.

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The bogies are also a key part of the proposed kit and are something that I have been working on with Justin Newitt of Rumney Models – the idea being to combine the sprung bogie design that he has prepared with cosmetic etches for the sides and then the castings from Lochgorm Models or perhaps our own in due course.  The bogie is quite sophisticated with both primary and secondary springing – the latter is on the bolster and is as below.

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The primary springing is on the axleboxes and has bearing carriers, much like the Bill Bedford sprung W-irons.  There are still some wrinkles to iron out so it is not there yet but they do make up into some pretty neat bogies; don’t you think?

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The only area of the first test build that truly did not work was the corridor connections and it is going to be a case of back to the drawing board for these but other than the final few bits to be completed, the build is finished and I think the vehicle is handsome.

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So, off to the paint shops soon, but there is a bit of a holiday to squeeze in first!

Dirty Models……..

Now, I wonder if that heading will gather a few extra viewings………..?

As I have mentioned before on this blog, every few months I catch up with a group of mates to have a joint modelling session.  The general gist of these is a combination of banter, a bit of modelling, more banter, a visit to the pub, even banter, a bit more modelling and all nicely rounded off with some more banter.

Last week  saw us on the south coast to do some weathering – or rather some of us.  One of our number was preparing for their imminent marriage whereas Oly (one half of OTCM) felt his budding TV stardoom was a sufficient excuse to hang up his airbrush.   We do fear that Oly may not return to the fold; preferring instead to do his modelling with Brad, Leonardo and Denzil once he makes his silver screen debut in the autumn – don’t forget your roots Oly……….

We were all concentrating on different things; Peter constructed the better part of a bridge for his Aultbea layout and Chris was weathering some rather neat little shunters. For my part, I concentrated on weathering some of the stock that I have been building lately (and sometimes not so lately!):

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First up is a pair of horseboxes.  On the right is my HR version based on a Microrail kit – still in need of some glazing.  On the left is the Caledonian’s equivalent based on a kit from by Spratt & Winkle.  Both are in their pre-group livery as can be seen.  As such stock was used in passenger trains, I have sought to give them an aged but largely cleaned feel – with the dirt largely present around ironwork and difficult to clean spots.

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Having mucked up the weathering of some brake vans at the previous weathering session, I was also keen to get these corrected.  This is where I have got with them.

As can be seen, I do not follow the school of thought that the pre-group or 1920’s era stock was constantly pristine.  If you bother to look at contemporary photographs, little is clean and some of it is downright grubby.  Railways in the steam era were very dirty places; it is inevitable where so much coal, ash and smoke prevail.  Furthermore, I can not see even the most houseproud of railway companies regularly (or probably ever) cleaning their goods stock and most of these show stock that is care worn and soiled.  This is the feel I am seeking to capture; not the utterly neglected and on its last legs look of the final days of steam but of railway materials that earn a living the hard way.

The pair of brake vans above are to HR diagram 39 from 1922 and are from a Lochgorm Models kit.  There is some doubt whether they were delivered in 1922, as there are no known pictures of any of them in HR livery.  However, I applying the “its my trainset rule” a number of modellers have painted them in Highland colours; including Paul Bannerman whose example is below.

The other highland brake van I weathered was the diagram 38 brake van.  This originates from a Microrail kit and may well still be available from David Geen occasionally at shows as he does own the rights to the artwork.  I have modified this with the early pattern roof look outs.  These allowed the guard to look over the train around the twisting curves that characterised parts of the Highland’s system.  However, there were complaints about whacked heads as the guards came up and down the steps to look onto the lookouts and as a result they were modified with approach cutouts on the roof – take a look at the Lochgorm’s page above to see an example.

Next up on the weathering front were some wagons and NPCS.  The first pictures being the weathering to a couple of the items I have described in the pages here – the Oxford Rail NB jubilee wagon and the Mousa Models LNWR van.

And then some rather more ancient models of mine, a Highland Railway meat van from a Sutherland Castings kit and a GC van from another Mousa Models kit.

Finally, a group of wagons for Benfieldside.  The hoppers have been seen before and the brake van we will hear more of another day.

 

 

In Praise of Cellulose Paint

A few months ago I was criticised for preferring to use cellulose paint when I spray; the concern being that cellulose thinners are aggressive and will damage the air-brush.

On the basis that I am of the view that “if it works for me” then I am going to carry on using it I am doing so.  I am helped by knowing that I am not alone in my preference as Ian Rathbone also recommends it and also because I have not yet had any issues with my airbrush.

The reason I prefer cellulose is that it gives an amazingly smooth paint finish every time, it drys very quick and gives a very durable finish.  Judge the former at least for yourself.

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More on the model in a future post……..

Richard Chown; 1941 – 2017

It is with great sadness that I advise that Richard Chown passed away last week.

Richard was a prolific modeller, typically of the somewhat unusual prototype and always in 7mm/1ft scale.  Not for him a debate between BR blood & custard or blue grey, instead he modelled unusual and quirky prototypes from Norway, Ireland or France – that always made his models interesting!

Although he did produce some smaller layouts, typically his layouts were somewhat on the large scale; tending from the substantial right up to a full size french viaduct where unless you were a basketball player you needed to stand on a box to reach rail height.  This layout was Allendenac, which was based on a French line a touch to the north of Clemont Ferrand.  The line was famous for the rather beautiful Rouzat Viaduct designed by Gustave Eiffel as a sort of trial run for the Eiffel Tower.

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A7=On the viaduct

All being made in 7mm/1ft made for a somewhat large layout and to give a sense of its scale, in the picture below, all but the person directly in front of the viaduct is standing on a box and in the view below that, you can see Richard at the rear someway up a ladder and still not to the full height of the layout (so you see Mrs T, I am not that bad really………..).

A12=At Telford

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With a layout of this size, access points to maintain (or build) the layout are important and here is Richard popping out of just such a hatch!

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Just because the layout was big does not detract from how good the modelling was, as these pictures show.

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Naturally, as he modelled the esoteric Richard had to scratch build everything for his layouts and he was a very talented modeller as you can see ……..

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This locomotive operated on one of Richard’s smaller layouts, Courcelle Part which was built for a Gauge O Guild layout competition.  It used some of the buildings from Allendenac and also its stock to create a more portable exhibition layout.  As I understand it, Courcelle Part had some cut outs to the rear within which to place the operator’s wine glasses – the wine was often local to the Courcelle and Allendenac region as Richard felt that it helped the operators get into the right sort of mindset to operate a sleepy french railway.  Now that is innovation in the field of model railways!

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Richard’s own website (which is operating now but will presumably be taken down in time) shows that he was already firmly into modelling as a teenager and contributed to several group layouts.

His first layout that I know anything about was when he modelled the Highland Railway and built a full sized model of Kyle of Lochalsh – weighing in at a mere 48ft.  Richard was, I suspect, inspired to follow the Highland by virtue of knowing Sir Eric Hutchinson and this interest brought him into contact with my father.  Although the layout was exhibited and fairly well developed as a model, Richard became conscious of some operating restrictions of the prototype (but only because he did not know that the engine shed was used as a headshunt!) and lost interest in it.  He disposed of it – apparently the under-bidder was none other than Roger Daltry!

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For me, however, Richard will best be associated with his layout Castle Rackrent; the name of which was inspired by a early 1970s property scandal.  The origins of the layout are very modest as a small (for 7mm) transportable exhibition layout but it proved a crush in his small bedsit of the time.  In an effort to find more room for the layout he found his employer accommodating (or perhaps unknowing) and erected it in a disused post office footbridge on Waverley station.

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Helped perhaps by handy access during lunch breaks and the better part of a mainline station to fit it, the layout reached (I think) 70m in length before BR decided that perhaps they would like their footbridge back…… Undeterred, Richard had a house built with a conveniently large (a.k.a. giant) basement to fit it and subsequently extended it to some eight stations such that it was an entire system.   The layout weaved around the room several times and even though the two stations below appeared next to each other, they were in fact nearly the length of the system apart.

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All this (or nearly all in the final incarnation) was single line and worked with bells as no station could see the adjacent station and the trains had to be driven to the signals and then handed over.  This made the operation of the layout somewhat unpredictable as I discovered at one stage when I had four of the six trains on the system within my station limits and a rather irate Slim Controller (you know who you are) sending urgent telegrams to discover the whereabouts of the hunt special…….

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There are rather more photographs of Castle Rackrent in my earlier blog posts – here and here.   The core of the layout – Castle Rackrent itself – was exhibited widely and on some occasions quite large parts of the system was transported to shows.  Here it can be seen at the Ulster Folk and Transport Museum, Cultra.

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Richard’s final layout (that was completed, there were others in gestation) was Fangfoss which was built to Scale7 standards but of a 3’6″ gauge prototype in Norway.  The layout was not an exact model of any location but was inspired by the Randsfjord line that was a little outside of Oslo and was a means of portaging past a series of rapids – in this case the Fangfoss.

Fangfoss showing the Foss rock and falls - RC

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As can perhaps been seen throughout Richard’s layouts he was keenly interested in bridges, often being the key part of his models; as in Fangfoss from which this detail is taken.

Bridge on Fanfoss

At the other extreme to the size of Kyle, Castle Rackrent or Allendenac, Richard also produced some cameo layouts, typically aimed at being transportable by train (he apparently took a large chunk of the Castle Rackrent system from Edinburgh to Bristol by train – back in the days when there were luggage compartments…..).  Here is a small one called Port Lairge Wharf which was perceived as an extension of the Castle Rackrent lines (although I don’t think it was ever connected).

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For finescale modellers in the Lothian Region, and occasional visitors from further afar like me, would gather on a monthly basis to operate Castle Rackrent and Richard was always welcoming and encouraging.  He will be sorely missed by all and it is fair to say that I don’t think we will see the like of he in the hobby again…………….after all, who would try to model the tallest viaduct in the world in 7mm (even if sense did prevail on this one as it did not get completed)…….

Garden Layout 1971 from RModeller

Rest in peace, Richard.

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Thanks to Jim Summers, Danny Cockling and Alan Aitken for the use of some of their photographs.

Dia 51 Full Brake – Test Build Part 1

Following the last delivery from the etchers, it was time to get on and do the first test builds.  First up was the dia 51 Full Brake.  This vehicle was one of the later coaches from the Highland Railway and was of similar design to the cove roof corridor coaches that have been available from Lochgorm Models for some time.  They were also amongst some of the last highland coaches to service as tool vans etc.  This is what one looked like late on in its career after its corridor connections had been removed.

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As with my efforts for the scrap tank, I am seeking to try and be a bit smarter with some of the kit design to draw together ideas of assembly of my own and also those of others.  So starting with the ends, these will be made with a double skin to both provide the footsteps and, less commonly, some tabs to allow the sides to be secured to them.

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I have always found that too many etched coaches have flimsey sides that become distorted as they are made (or when ham-fisted me does anyway).  Therefore,  I have designed this such that the head and base of the side have significantly sized stiffening pieces, as can be seen below.  These are designed to interlock with the tabs at the ends such that most of the locating of the parts is largely defined by the kits components.

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Once the basics of the shell are together, this is what it looks like.

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The roof proved to be one of the most challenging parts of the build.  I had originally designed this with an inner to form the shape of the roof and then a thinly etched outer layer to go over this to provide the rainstrips and other detail.  It proved too difficult to get the two to laminate well or even be rolled to a similar curve.

Instead, therefore, I ditched the outer layer and relied only on the inner.  This had been half etched on the underside to assist its rolling to the curved profile.  I found that it was still difficult to roll the roof due to the tightness of the curves at the extremity of the roof but by simply using bending bars it was quite easy to put the curves in with a limited amount of faceting.  Faceting is where short straight sections with bends to the next short section that gives the impression of a curve.  Once this was then filed on the outside to smooth out the facets, a smooth curve became pretty good.  Thereafter, it was necessary to form the rainstrips with wire and file them back to square sections and as you can see, the effect is pretty convincing.

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The underframe and bogies are to follow, in part 2.

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Modern railway modelling in the Midlands

petesworkshop

My modelling musings on Portchullin, Glenmutchkins and anything else that takes my fancy.

Llangunllo.

My modelling musings on Portchullin, Glenmutchkins and anything else that takes my fancy.

Loco Yard

Heritage & Model Railway Blog

The Erratic and Wandering Journey

Railway Modelling in S Scale (1:64)

Ouse Valley Modeller

Ouse Valley Modeller is a blog about my 4mm OO gauge modelling, my observations mostly about Sussex railways in the 1950's and my layout Herstmonceux

cardigan bay coastal railroad

A fictious railroad in 0n30

Morpeth In O-Scale

Why Settle For Half When You Can Have The Whole O?

Portwilliam

Southwest Scotland in 00 Finescale

westhighlandmodelling

Modelling the West Highland Railway & Beyond

Oswestry Works

Locomotive works diorama in 4mm

Port Rowan in 1:64

An S scale study of a Canadian National Railways branch in Ontario - in its twilight years

clecklewyke

from little acorns...