Porth Dinllaen

simond

Western Thunderer
Waaaay back in 2013 I posted on RMW about my ambition to build a model based on Porth Dinllaen - edited highlights of that very old post are below.

In the intervening 13 years, many things have changed; the kids have flown the nest, the hard-won planning permission for an extension that would have given me a wonderful workshop in an extended garage, and a 63m2 railway room above could not be built for less than £300k and that was not a reasonable sum for a couple of hobby rooms, and so, after much debate and indecision, we concluded that a garden room is the way to go. You can build a 30m2 garden room under certain conditions as permitted development, but what you cannot do is run roundy-roundy 6 coach express trains in 0 gauge in such a space - and I wanted to be able to play trains year round. Accordingly, I applied for permission to build a 50m2 studio shed in the garden. The approval (with conditions, we live in a landslip area) was granted on Friday. Yee Harrr :)

Oh yeah, one other thing - I will retire at the end of July.

It will be well insulated, heated and cooled, and well able to be used on Christmas day as well as midsummer's day.


I've been researching Porth Dinllaen for a while now, as it is the scenario I have chosen to develop for my intended 0 gauge layout.
It still is

Brunel seriously considered Porth Dinllaen as a competitor to Holyhead, the line would have surely come up from Barmouth, via Harlech, Porthmadog & Pwllheli. How it got there from the midlands without climbing Talerddig is another question (double headed Kings with bankers...? Would have been a sight to behold - and hear!)

The shed is externally 10m x 5. A passenger terminal based on Birkenhead Woodside will occupy one wall, and I hope to use the PD loco shed that I have built over the last few years as a module of the "high level" side of the model - the tracks will lead out of the shed to a short run (20m) and a return loop. The other long wall will be the goods facilities, a representation of the docksides (again based on Birkenhead) and this will be at a lower level than the passenger facility, allowing me to have hidden storage below the station - and to allow a complete running loop inside the shed, with radii not less than 2m. There will be an internal gradient link between the lower level and the passenger station which will allow roundy-roundy running using the outside tracks and the internal link.

I was intending to be able to get 8 coaches in the platform, but will probably have to settle for 6. Platform 1 will handle a 4m train, platforms 2&3 will handle 3m trains. Platform 4 will handle shorter trains. Platform 5 for parcels and smalls. The current loco shed will fit across one end of the shed.

Ironically, there are some similarities with Folkestone, as a harbour at the bottom of a steep hill, single pier, bridge access, just without the interests of the local landlords preventing the seaside being polluted with a loco shed means I can put it at the bottom rather than the top of the bank! I could even use multiple 57xx's as bankers!
The gradients are no longer part of the plan. I don't think the banker models will be practical in the latest design. I had hoped to have a quarry branch, I think that idea has been dropped. Maybe a future outside branch?

Traffic will comprise regular "Irish Mails", plus passenger services to & from London, the midlands and more locally. Outbound freight will cover cattle, sheep, milk & meat, fish & veg of various sorts dependent on the season, plus dock traffic from Ireland (which may comprise much the same profile), and block trains from the quarry. Inbound freight will comprise coal (for the ships and for Ireland, which I believe still imports it) and manufactured goods, and quarry empties.
And the "Birkenhead Meat" - I have the 47xx, and I have been building, collecting, doing Mica meat wagons for years - I now have 9, and need at least 20 for a decent train.

So far, I have built most of the locos that will be required, from Martin Finney (47xx), Springside (Hall, 48xx, 45xx), JLTRT (King), CRT (1361) , Warren Shepherd (52xx), Acorn (57xx) and Scorpio (Castle) kits, bought a Dean goods, scratch built a 28xx and need a couple of 43/63xx and Birds/Bull/Dukedogs and a couple more shunters to complete the roster. They are all DCC fitted, the King & 28xx have sound, which I love!
I think all my locos now have sound. Tre Pol & Pen built, the Mogul is on the workbench thread, I've acquired a few Panniers from Minerva and Lionheart, we are not short of locos.

I have amassed 50 plus wagons ( and will need another 50) and 20 plus coaches & brown vehicles, and the main thing I need now is the time & money for the garden building ( or a decent lottery win!!!) in which to start the baseboards and track laying. As that won't happen for at least three & probably five years (not counting on the lottery win here!!!) I will content myself with building more elements of the layout; there is a turntable ( see "stepper motor turntables" in RMWeb), and I've made some pleasing progress with a 7mm scale Stothert & Pitt 12t crane based on the original drawings of the crane at St Peter Port. I've also rescaled the manufacturers drawings of the Edgerton float bridge from Birkenhead docks from1/48 to 1/43.5 ( I hate Henry Greenly!) and am awaiting the opportunity to develop a set of laser cut parts for it.
The bridge is being redrawn to be a hybrid of PCB, metal, 3DP FDM and will be 20% longer than scale, so my waist will fit through. The crane is part built and in a box, waiting for the time to see the light of day once more. I estimate that I have acquired a good proportion of the 50 plus wagons I will need, and, through the developments in 3DP, I have printed a good proportion of them myself. Now, if I could get to be able to paint and letter them to a decent standard...

Train operation will be DCC, points & signals will be mostly servo-driven, though I have a dozen tortoises that will get re-used. Aiming to keep driving and signalling separate.
This remains the plan - everything that is not loco control will be CAN-bus based. Loco control will be DCC

I hope to rip up the Greater Windowledge Railway and start on the loco shed, it being the only bit of the grand plan that will fit in my lounge, some time early in the New Year. At least, by then I'll have a turntable, a coal stage /water tower and most of the locos...
The Greater Windowledge Railway is long, long gone. Along with the pussycat whose footprints occasionally appeared thereupon :(


a few references -

Phil Greaves Rhyd y Clafdy, (Model-railways-live .co.uk)
Trefor - LNWR approach from Caernarvon (RMWeb)
Porth Dinllaen (RMWeb)
Provisional coastal terminus idea (RMWeb)


Proposed London to Porth Dinllaen Railway Report
Pwllheli and Nefyn Light Railway Papers
http://archiveshub.ac.uk/search/sum...rd=1&maximumRecords=20&hitposition=0#rightcol

User:Ansbaradigeidfran/Sandbox2 - Wikipedia

http://www.forgottenrelics.co.uk/tunnels/construction/purdon.html

Porthdinllaen - Wikipedia

Llyn Railway

Walkingworld


More soon....
 

RichardG

Western Thunderer
I applied for permission to build a 50m2 studio shed in the garden. The approval (with conditions, we live in a landslip area) was granted on Friday. Yee Harrr :)
Well done!

My own garden room is 10.5 m2, but then again the entire garden is 50 m2. I bought mine as a home office before I retired; it can never hold a main line in any scale I can cope with but it could support an L-shape in 7mm scale with extra track outdoors.

It will be well insulated, heated and cooled
I have air conditioning in mine. The smallest air conditioner / heat pump you can buy will support at least 30m2. I think I will be living in here for the heat wave coming in the next few days.
 

Yorkshire Dave

Western Thunderer
It will be well insulated, heated and cooled, and well able to be used on Christmas day as well as midsummer's day.

I have air conditioning in mine. The smallest air conditioner / heat pump you can buy will support at least 30m2. I think I will be living in here for the heat wave coming in the next few days.

It may also be worth considering a dehumidifier to run alongside the air conditioner (increasing the efficiency of both) as UK summers tend to be humid rather than dry. Also, if you live in a coastal area the humidity is higher compared to inland areas and an air conditioner may struggle. Dehumidifiers also prevent mould growth, help alleviate allergery symptoms and reduce dust mites.
 

Yorkshire Dave

Western Thunderer
Ironically, there are some similarities with Folkestone, as a harbour at the bottom of a steep hill, single pier, bridge access, just without the interests of the local landlords preventing the seaside being polluted with a loco shed means I can put it at the bottom rather than the top of the bank! I could even use multiple 57xx's as bankers!

As the tables are turned and being similar to Folkestone Harbour you should be using multiple ex-SR locos as bankers! - not 57xx's. :))
 

adrian

Flying Squad
Accordingly, I applied for permission to build a 50m2 studio shed in the garden. The approval (with conditions, we live in a landslip area) was granted on Friday. Yee Harrr :)

Oh yeah, one other thing - I will retire at the end of July.
Double congratulations - I'm aiming for retirement August next year and have already started planning similar scenario's, but ours includes a move back to God's Country. I came to the conclusion that we'd preferred to have a separate outbuilding studio/workshop of one form or another so will follow your progress with interest.
The gradients are no longer part of the plan. I don't think the banker models will be practical in the latest design. I had hoped to have a quarry branch, I think that idea has been dropped. Maybe a future outside branch?

I've ended up buying a rise and fall desk to work at home (sciatic nerve problems :( ) - you can buy the just the frame legs etc and put them under an existing desk top. i.e. no desktop makes it a lot cheaper.


I know it doesn't help with a roundy-roundy option but I was thinking that in a suitably hidden area it would make a useful vertical traverser or a transit system to a lower level storage system as it has a decent range and size. It is very smooth in operation and has 4 memory presets.

Screenshot 2026-06-22 at 08.07.42.png
 

simond

Western Thunderer
Thanks Adrian

I have a rise-fall desk at work - unfortunately my successor is looking forward to using it!

I have most of the CAD for a vertical traverser, should you want it, just ask. Solidworks native but could file to step or iges
 

LarryG

Western Thunderer
I would never build a model railway in the house, as I prefer to keep the place 'civilised'. A shed is fine and suits my preference for being outdoors as much as possible. When I look at the dust and stuff that accumulates during layout building, a shed is the best place for it!
 

Simon H

Western Thunderer
Was'nt there a P4 layout in the MRC in the 1970's upon a similar theme?

Or could that have been Nefyn/Morfa Nefyn
Yes, it was in the first issue of MRC that my Dad bought me!
The railway was L&NWR rather than GWR, though.
Simon.
PS: that article must still be embedded in my brain, as it was what immediately came into my head when I saw the title of this thread...
 

simond

Western Thunderer
Are they letting you have a solid floor slab? (That’s assuming you would like one of course).
I haven't asked. The house is on a humungous raft, it is reported that the rafts for the four houses at our end of the road bankrupt the builder, though that might be hearsay.

My plan (to be confirmed by the ground Engineer) is groundscrews - suitable for self installation and much cheaper than tons of concrete that would have to be pumped over or around the house. And with a wooden structure and floor I can easily integrate insulation to keep my tootsies warm.

The only concern I have is that I do not wish to create rodent central under the shed. Pondering that one.
 

simond

Western Thunderer
Yes, it was in the first issue of MRC that my Dad bought me!
The railway was L&NWR rather than GWR, though.
Simon.
PS: that article must still be embedded in my brain, as it was what immediately came into my head when I saw the title of this thread...
If you (or anyone) has a copy of said article, I would love to see it, or a scan, of course.

I guess the LNWR already had Holyhead, and I presume they calculated that the Menai crossing would be cheaper than the groundworks to get to Nefyn, so I am not sure why they would have wanted both. Maybe to keep IKB out?
 

simond

Western Thunderer
I would never build a model railway in the house, as I prefer to keep the place 'civilised'. A shed is fine and suits my preference for being outdoors as much as possible. When I look at the dust and stuff that accumulates during layout building, a shed is the best place for it!
I've seen shed layouts and garden layouts and in-the-house layouts. There is something very pleasant about dragging on your dressing gown and wandering into the lounge for a little light soldering (or something similarly quiet) whilst Madame has her Sunday Morning lie-in. I shall have to be more completely dressed to venture out into the garden to access the shed, particularly in the depths of winter!
 

simond

Western Thunderer
Well done!

My own garden room is 10.5 m2, but then again the entire garden is 50 m2. I bought mine as a home office before I retired; it can never hold a main line in any scale I can cope with but it could support an L-shape in 7mm scale with extra track outdoors.


I have air conditioning in mine. The smallest air conditioner / heat pump you can buy will support at least 30m2. I think I will be living in here for the heat wave coming in the next few days.
Bidirectional heat pump is on the cards, thanks. I might also have a couple of greenhouse heaters at low level, I'll see if they are needed.
 

simond

Western Thunderer
It may also be worth considering a dehumidifier to run alongside the air conditioner (increasing the efficiency of both) as UK summers tend to be humid rather than dry. Also, if you live in a coastal area the humidity is higher compared to inland areas and an air conditioner may struggle. Dehumidifiers also prevent mould growth, help alleviate allergery symptoms and reduce dust mites.
Yes, we are 200m from the Channel, about 60m above sea level. On a bright but windy day it is astonishing how big a salt spray cloud there is over the beach. Even up here, the salt is noticeable and things like door handles on the relatively new double glazing units have already begun to corrode, and the salt is of course hygroscopic, so I think a dehumidifier might be a good idea. I have an old screwfix one in the garage, I can try it to see what effect it has, and if worthwhile, I can fit a fixed one. But the aircon/bidirectional heat pump will also have the same effect on hot days at least.
 

jonte

Western Thunderer
Lots of good advice here. May I just add my best wishes for a long and happy retirement and every success with your projected 0 gauge layout.

Roger.

Hear, hear.

Sorry Simon, I must have misread your initial post and thought the start date for the countdown to retirement was 2013.

May I wish you all the very best for your well earned retirement and this your magnum opus :thumbs:

Will watch with interest.

Jon
 

Roger Pound

Western Thunderer
The only concern I have is that I do not wish to create rodent central under the shed. Pondering that one.
I can recommend a cat as a first class deterrent to the development of that situation. The floor of my old shed is elevated several inches at one end to take acccount of the 'fall' of the ground. I put a layer of 10m stone down before the shed was placed on bearers above it and the airflow helps keep rot to the wooden floor at bay, although my twenty five year old building is succumbing at the other end. Like me, it is of an age and past it's best......... :rolleyes: ! I accept things and practices have changed and developed since the time I had my shed erected so I might just be rabbiting on about things that have been supeceded. If so, forgive the ramblings of an old chap, but I do stand by having a cat! :thumbs:.

Roger
 
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