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Author Topic: Metropolitan/LT K Class / LNER L2 2-6-4T build from Mountaineer Models  (Read 940 times)

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Offline Pedanticmongrel

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Recently I have seen many applications of the Farish N Mogul as a basis for other models, I guess it because of a current shortage of '2-6-0' and '0-6-2' models that it is perhaps a desirable choice. However back when the N mogul was first released by Farish, I suggested perhaps the most logical choice of locomotive to use the N as a basis for, the Metropolitan Railway K class.

The logic behind this lies in the history of the prototype, to summarise, the K class came about when some N class locomotives were built by Woolwich arsenal as kits of parts but the Southern Railway did not want them. The Metropolitan bought them and designed a tank engine around the parts, 6 were constructed in all, they were used on mostly freight between Verney Junction and Finchley Road, but sometimes stood in on passenger workings between Verney Junction and Rickmansworth.


113 at Aylesbury in 1930. (Photo from Locomotives Illustrated No 65)

They were absorbed into London Transport stock along with the rest of the Metropolitan Railway in 1933 and the LNER bought them along with some other ex Metropolitan stock in 1937. They were withdrawn between 1943 and 1948, the last 2 making British Railways ownership but not receiving numbers.



115 at Dutchlands Summit in 1938 (Photo from Locomotives Illustrated No 65)

They kept many of the original N parts for their entire lives, with cab, tanks and bunkers designed by George Hally around the existing parts with as little alteration as possible, however least one member of the class received an LNER standard smokebox door.


6160 at Neasden in 1946(Photo from Locomotives Illustrated No 65)



A few months ago, off the back of a conversation with Max Brayne who runs Mountaineer Models took on the project to create a 3D printed, cab, tanks and bunker to turn a Farish N class into a K class.


3D model taking shape. (Screenshot from Mountaineer Models)

Mountaineer Models normally specialise in Narrow Gauge prototypes in far larger scales, so this print is somewhat ground breaking both in terms of prototype and scale. In this thread I aim to show step by step how i have managed to make the print into a model. However this is the prototype build which partly is being done to find any issues before it goes on shapeways:

*update* The print for this project can be bought here: https://www.shapeways.com/product/XXYXRYHA5/metropolitan-k-lner-l2-for-n-gauge-2mm-scale?optionId=86025155&fbclid=IwAR1BwE0N01uOLX0Sx2hYfSST07cl7yUjchP2P3wwXi9_GCOY1TfdQ6cN-Jk




This is the starting point, here we have a Farish N class with the body and cab removed, and the print alongside, the print consists of 2 parts;
1. Cab Bunker and Tanks in one single part
2. Rear bogie frames and tank overflow pipes
Additional parts required from the spares Bin are a spare Farish B1 front bogie (not shown in those photos) and a spare set of N mogul leading driving wheels.



First job is to remove the tender. it is not required, neither is the cab. put those in a your spares bin.



Then swap out the trailing set of driving wheels for the spare leading set, this will allow all 6 driving wheels to pick up, rather than the leading 4 only, the trade off is that you will no longer have traction tyres.



Now cut off the cab steps ready to fit the print. this may require a little further filing on some surfaces that join together, i found i had to remove some pipework from the boiler in order to fit the print. you can test fit it at this stage.




Cut off the pin that the tender previously coupled to, and file up into the block, at least 2-3 mm, to allow space for a thick piece of plasticard. Stick the plasticard to the block on the filed surface and drill into the plasticard a hole to screw to the rear bogie arm into it. DO NOT go right through the plasticard with the screw, due to the chassis being split a screw could easily cause a direct short so best test with a multimetre before running that both halves of the chassis are insulated to each other.


Then test fit the body with the print to check the bogie is in the right place and can swing freely.

That is all for now, more coming soon.




« Last Edit: February 04, 2019, 03:59:26 PM by HRH_Dan_Hull »

Offline Pedanticmongrel

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Re: Metropolitan/LT K Class / LNER L2 2-6-4T build from Mountaineer Models
« Reply #1 on: February 04, 2019, 04:43:03 PM »
Sorry for the prolonged gap from the last post (a change of job, house move and other modelling projects have got in the way!) Anyway, here is the conclusion to the build guide;


So at this point you need to drill holes into the chassis and screw terminals and if using DC wire directly to the motor terminals, or as in my case wire to a DCC chip with enough slack to allow it to sit over the rear bogie.



This presents a problem however and it is solved by drilling and filing I am afraid, both DC and DCC versions will require the backhead being drilled out to create space for a the screws that provide solder terminals. I have also cut out the boiler sides that will be hidden behind the tanks, this is an optional approach and I shall explain why I have done this shortly.



This hole allows the DCC chip to be located inside the cab, but as my chip didn't quite fit I had to cut a hole in the back of the cab on the print so the chip in fact sits mostly within the bunker.



A test fitting is recommended to ensure your chip fits into the bunker/cab area, however be careful, this is a fiddly process and can take a little patience to work. I used the tip of a cocktail stick to help move the chip into position through the cab sides.
Now for the boiler sides, I have cut out the sides that are hidden behind the tanks, the line seen on the boiler side shows where the boiler is visible above the tanks, due the curvature of the boiler I did not go up to this line because if i did you'd be able to see the hole from the outside when the loco is completed.




The reason for these holes is to maximise traction and electrical contact I have opted to put strips of scrap lead inside the tanks, their perfect location over the driving wheels will balance the locomotive too.



As you can see it isn't much lead but every little helps




Once completed, check the body fits once again (it is easy to put too much lead in and have fitting issues and it's best to solve them before handrails and painting! Next stage is to add the handrails, I had to drill my own, but i believe the print is now sold with pre-drilled holes. I used handrail knobs and wire sold by N Brass for this. Additionally add the rear vacuum pipe and coupling, the ones supplied with the N class will fit perfectly to the print.

Then it is on to painting, I am sure we all have out own techniques for this, but personally I always start with a halfords grey primer as a base coat.




Then as far as livery application goes, for LNER livery, just plain black all over and letter 'NE' or LNER' depending on period. The options being London Transport or Metropolitan. Now I am unsure about repaints. Colour photo evidence is hard to find and phoenix paints offer two options that I considered, C163 L.T. Rail Red and P861 Metropolitan Loco Maroon, the latter I chose even though I was ultimately unsure, it looks very dark when first applied. The only colour photo I could find of one of these engines was well into LT days and the red had faded but was not as bright as C163 L.T. Rail Red. So I stuck with P861 and unlined it looks like this:





In order to line and letter I used the following:

Fox Transfers: FRH 2250 + FRH 2250/4 (Lining), FG 1803 (Metropolitan Lettering and numbers on bunker rear)
Narrow Planet: Bunker side number plates (bespoke order, I am sure they will do more if requested)

So here is the finished model;





Once again, if you want to have a go yourself the 3D print can be obtained here:

https://www.shapeways.com/product/XXYXRYHA5/metropolitan-k-lner-l2-for-n-gauge-2mm-scale?optionId=86025155&fbclid=IwAR1BwE0N01uOLX0Sx2hYfSST07cl7yUjchP2P3wwXi9_GCOY1TfdQ6cN-Jk


Offline joe cassidy

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Re: Metropolitan/LT K Class / LNER L2 2-6-4T build from Mountaineer Models
« Reply #2 on: February 04, 2019, 06:51:06 PM »
That is what I call an RBD (Reet Bobby Dazzler) !

Congratulations for imagining this in the first place and the final result.

Best regards,


Joe

Online Shiney Sheff

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Re: Metropolitan/LT K Class / LNER L2 2-6-4T build from Mountaineer Models
« Reply #3 on: February 08, 2019, 06:31:36 PM »
Just bought an N class from Rails at a bargain price, not sure if I have the bottle to chop it to bits to achieve the fabulous Metropolitan loco you have created.

Bob

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Re: Metropolitan/LT K Class / LNER L2 2-6-4T build from Mountaineer Models
« Reply #4 on: February 12, 2019, 09:09:50 AM »
Very nice! I've been following this for a while, good to see it is available. Our club are modelling Aylesbury in N, set mainly in the mid 50s. A K is about 20 years too early, but what the heck!

 

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