N Gauge Model Railway - Episode 6 - It's Alive!!

Documenting my journey into model railways.

As I mentioned in an earlier episode of this series, I actually have another loco in the shape of a very battered Minitrix No 201 0-6-0T Dock Tank Loco in British Railways black which I found in a £3 grab bag of toys in a charity shop.

It did work, but not very well, so I had a go at blindly repairing it.  I'm a man, I don't need instructions... how hard can it be?

I killed it...

...or at least I thought I had.  I disassembled the running gear and could clearly see that there was nothing stopping the motor from moving about in the chassis and consequently the worm gear from becoming unmeshed with the drive gear.  Two tiny countersunk screws were missing from the motor plate.

Thanks to the information found on the marvellous site Classic Minitrix I was able completely strip down the chassis and to put it back together with the wheels in the right configuration.  I don't know if this is normal but this little engine uses the wheels and chassis as pickups from one rail and isolators on the axle allow other side of the wheelset to pick up from the other rail.  

As soon as I applied power the motor sputtered into life.

It's not out of the woods yet as it is missing some bits like a buffer, the two tiny countersunk screws which hold the motor in place and both couplers, springs and the plates which hold the whole shebang together.

I'm sure that these are readily available on the internet somewhere like Lendons of Cardiff.

It really does need a lick of paint as it currently looks like a very well played with matchbox car. Fortunately the decals are in great condition so at bit of black enamel and a protective coat of matt varnish should see it back in good cosmetic order.

The Tale of 1,600 Machine Screws

Sourcing the screws to retain the motor was not difficult as there are plenty of eBay sellers offering tiny watch screws.  The challenge is discovering what size screw Minitrix used back in the day when they designed this little loco.  

The answer is M1.6 x 3mm.  I know, because I bought 1,600 countersunk machine screws to try to find two which were the right size.

How does it Run?

Like the clappers.  It's not great at very slow scale speeds but as you can see it flies around the small loop on my layout.  My choice of electrofrog points is causing it to get stuck (hence the speed) but it runs.

Not to worry, there are big changes coming to Upper Carrom so tune in next week.

N Gauge Model Railway - Episode 5 - Can you 3D Print N Gauge Wagons?

Documenting my journey into model railways.

IMHO a 3D Printer is essential for most model hobbyists, they have never been more affordale and easier to use, as long as you have awell ventilated place to put it like a workshop or man cave then you should get one. 

The cost savings of print your own models compared to commercially produced injection moulded kits or ready to run models just makes it a no brainer.

N Gauge Rolling Stock - Thingiverse Thing:6503848

I found this selection of N gauge Rolling Stock models inspired by the PECO wagon on thingiverse and thought I would have a go at building my own rolling stock.  

The kit of parts is great and offers a basic short 4 wheek wagon chassis comparable to the ones I already have in my collection which came with the starter set.  On top of this can be fitted a choice of:

• Box Van
  
• Brake Van
• Cattle Van
• 5 Plank Wagon
• Tank Wagon 

The kit also comes with two roofs for the brake van, and the cattle / box van and rapido style couplers. 

Printing Advice

Supporting the model well is crucial.  I chose to print my chassis flat side to the build plate, but I still added plenty of supports arount the edges, buffers and inside the coupler box to ensure a good print.

The wagon bodies have a short pair of keys which lock into 2 matching slots in the chassis so their is no flat surface and a similar support exercise is required.  The roof is easier to support as noone will see the insides.  The trickiest part to print were the bars on the cattle van, which are really too thin at this scale.  When I reprint my cattle trucks I will likely recreate these slats in thin card.

Assembling a 3D Printed N Gauge Wagon Kit

Assembling the kit is a simple case of adding the couplers to the chassis and sealing the two halves together with your choice of body style.  

Ready to Run models typically have sprung couplers but I had no tiny springs on hand, so created a simple spring from the thin transparent packaging that the wheels came in. 

Cut to size and bent in the middle this provides enough "spring" to keep the couplers level.

The brake van has a specific roof with a stove vent whereas the cattle van and box van have a ventless roof.

What about wheels?

The kit does not come with wheels and whilst I have found some models to print I thought it best to buy these on one of my many aliexpress trips.  

I found a seller offering 48 plastic wheel sets by Evemodel, that's enough for 24 wagons, for the princely sum of £5.49 + shipping.  If you want metal wheel sets they are readily available but obviously more expensive.

The wheels fit neatly into the holes in the axle boxes of the chassis, although I did have to open up the rectangular pockets that the wheel flanges sit in to enable free running and end float.  This was a trivial task with a small needle file, although care must be taken when fitting the wheels to avoid breaking the brake assembly detail. 

Once assembled they look pretty convincing.

How do they run?

Pretty well as you can see in the video below.  The couplers hang down a little, but with the addition of the little makeshift springs I think these will work very well on my layout.

N Gauge Model Railway - Episode 4 - All aboard for Upper Carrom

Documenting my journey into model railways.

It's high time that this layout got a name and it seems appropriate to call it Upper Carrom as it is quite literally above the Carrom Table.

Of course it wouldn't be a real railway station if it didn't have a railway station sign.  There are plenty of places you can download but I wanted to model one myself and the technique I used to make my badges and the famous Okey Dokey sign is a great fit for what is a very simple design. 

Use The GIMP

I have been a GIMP user for many years ever since Photoshop 5 and it is an awesome free alternative.  Yes it has it's quirks but once you get used to them it's pretty much plain sailing and has everything I need in a bitmap image manipulator / Photo editor.

On a transparent layer floating above the white background layer, I added the station name using the text tool making sure that this was 100% black.

The basic name plaque lozenge shape is easy to create using the circle and rectangular select tools to create shapes on seperate layers filled with 100% opacity black.  These were then merged together to create a single "half" which could be duplicated and flipped and then merged to create the whole lozenge.

The middle lozenge was just a repeat of the steps above.  Do not merge the full width lozenges together at this stage.  You shouls have 4 layers (from top down) Text, text lozenge, middle lozenge and finally the white background.  Hide the text layer temporarily.

For each of the lozenges, select the black area and use the select > shrink command to reduce the selection to an appropriate size then fill this with white.  Merge Down the sign lozenge onto the middle lozenge to create a single lozenge layer 

Unhide the text layer.  You should now have a black and white railway sign.  Export this for Tinkercad as a png no larger than 1000px wide.

Finally select in the lozenge layer select everything outside the lozenge using the fuzzy select tool, invert the selection and create a new layer above the white background fill this with black.  Turn off the layers above and export to png.

In Convertio

Convertio.co is a fantastic free web based converter tool.  Just upload the two png files and convert these to SVG.

In Tinkercad

Import each of SVG files you have just created as "Art".  Modify the height of the text layer so that the text and the border of the sign protrude protrudes out of the background.

Export your model as an STL for 3D Printing.  Import this into your slicer (it will be big) and scale to your needs. 

Obligatory Running Video

The first running of the newest addition to the ready-to-run rolling stock collection, a cheap aliexpress Canadian Government grain wagon... it's on loan okay. 

N Gauge Model Railway - Episode 3 - Loops, Points and Elevation

Documenting my journey into model railways.

As I mentioned in the first episode of this series, my wishlist includes 3 loops of track which requires a significant number of points if one is to return a train to any one of the loops.

The largest radius I can realistically run on this board without the whole layout  turning into a helix is going to be 12".  I printed out some tracksetta style gauges to help me lay the random collection of secondhand flexitrack.  I also made a rudimentary  curve compass out of a strip of hardboard to help scribe the radii on the baseboard and also to cut sections of track bed which will be elevated.

Where we're going we don't need... plans

I am not following any plan with this layout.  It's a case of design on the fly based on what track I can scrounge together.  In fact the layout has changed and will continue to change based on the age old philosophy of do I really need 11 sets of points!!

At this very moment the plan looks something like this:

Notice the addition of the first scenic items in the form of the viaduct fascias.  All will b e revealed in the fullness of time or when the 3D Printer has finished printing them off.

3 Continuous Running Loops

What is the point of a coffee table layout if it doesn't have continuous running.  My 3 Loops are loosely defined as follows:

Loop 1 (Purple) - A 9" radius (1st radius?) with the smallest points I have turning this into an oval.  I could really do with replacing these points for a matched pair of 1st radius curved points so that I can properly form the fiddle yard.  At the moment I am not confident that the southern tank engine can make a tighter radius curve.  Fingers crossed I can get the little black shunter working as it has a set of tiny little wheels in an 0-6-0 configuration.  Being a diecast body it's got some weight to it unlike the Southern which is made of plastic. 

Loop 2 (Green) - A mix of radii from 10" to 12" and traverses the entire layout from the staging area at the bottom up the left side and into a tunnel which runs underneath the viaduct and then emerges on the right side of the layout.  This is essentially a branch line and will be running a mix of small 4 wheel coaches (when I buy or make them) and goods wagons.  This will be the preserve of the Southern Tank Engine unless something better comes along.

Loop 3 (Yellow) - The largest loop (but not by much) and is a squared off 12" radius circle.  It takes you all around the layout rising on the left to the viaduct and falling back down on the right to rejoin the staging area bottom left (blue).  I have tested the gradient with the only working loco I have and it can pull a full rake of 6 wagons weighed down with nuts and bolts.  This will be the main line and hopefully I will be able to run larger coaches and goods wagons with articulated bogies.

Power to the People

With all this going on and the potential of having 3 simultaneous running loops and accessories, I am going to need to get some more controllers and isolate each loop with those isolating fish plates all the cool kids use.  This of course is going to be a whole other ball game, but I am going to stay DC rather than go DCC as I just can't justify the complexity at this stage.  However, there is nothing to say I won't change my mind further down the line.

Talking about Tracks but specifically making a point about Points

There are a lot of joblot auctions on eBay for collections of track and it is somewhat daunting to a beginner to try to find exactly what you want to fit in a given space.  Flexitrack is your friend as you can essentially lay track from point to point.  Track is so goddam expensive and I'm trying to keep the cost to a minimum, I'm not a Rothschild you know (only when I'm Bunty), so I buy what looks right, even if in the end it might not be.  False economy I know.  Especially when you don't know that PIKO track is a completely different connection standard to PECO... fortunately this only cost me £10 to learn.

However, when we get down to the tight transitions between the curves I think I might need to bite the bullet and buy specific radii turnouts.  Wouldn't it be awesome if each manufacturer published a set of photocopiable templates of their set track and turnouts so you could literally try before you buy.  If you know of any please do pop a comment in the section below.

Points Theory

Finally, there is some points theory to consider (which I am also slowly learning) behind designing a three loop continuous running layout.  I will cover this in a future episode as it is driving me insane trying to visualise what I need to buy compared to what I want for the layout and my available space.

Obligatory Running Video

N Gauge Model Railway - Episode 2 - MDF uh huh uh huh!!

Documenting my journey into model railways.

If you read episode 1 of my carrom table layout build then you will have heard me rant about how the "big box" DIY stores in the UK have fully transformed into soft furnishings stores.  

What you probably don't realise is the markup is significant.  Two pieces of 12mm MDF required to make just my baseboard would have cost in excess of £32 leaving me to buy extra wood for the side panels.  However, a whole sheet of MDF custom cut to my requirements by an oldfashioned builders merchant was £40 and left me with so much extra from the full sheet that I have MDF coming out of my ears. 

Building my N Gauge Layout Baseboard

With all my wood precut to approximately the right size it was a fairly easy task to trim the panels to final size and screw together.  The whole structure sits neatly on top of the carrom table and can be lifted off in case carrom needs to be played.  The carrom tabletop is hinged to allow access to the storage bin below and this can still be operated with the layout sitting on top although any loose items like rolling stock will need to be removed first.

What did the Romans ever do for us... The Viaduct

This week also saw the addition of the first scenic item to the layout in the form of a viaduct.  I purchased the single track viaduct model by Crafty 3D from Cults3D  and threw it on the printer.  

Whilst this is a scenic item, adding this to the layout early on is crucial as it dictates the height of the elevated Loop 3.  Working out the exact gradient of the incline from base to viaduct is going to be a process of trail and error, but I would like a train to be able to pass from Loop 1 to Loop 2 and ultimately to Loop 3 and back again.

I will not be printing these viaducts en masse as my viaduct is also a front for the Loop 2 tunnel.  I don't fancy carving a hole through 8 or 9 of these bad boys, to say nothing of the wasteful use of resin in printing something just to cut it out.  The future is here, there is a better way...

My solution is to make these into removable fascias, allowing me to extricate any trains which may have derailed inside.  The plan is to print out a series of these fronts which can be linked together to form a long fascia.  The fascia will be magnetized to stick to a solid shelf which will carry the Loop 2 track and allow wide access for said emergency train extraction.

This is a fairly trivial task to open the STL in Meshmixer and use a plane cut to remove all the unwanted model leaving you with just a thin fascia.  Taking this approach is doubly advantageous as it also allows me to spread these fascias around a curve.

Small Businesses

The viaduct model also comes with a selection of arch inserts ranging from shop fronts to a warehouse.  These will of course be magnetised to allow for easy swapability and add a bit of variety to the layout.  

The exact nature of these businesses remains to be seen and will be covered in a future episode.

Obligatory Running Trains Video

To ensure that I keep up the momentum it is important for me to keep a section of the layout in running order.  The layout is in my front room and so it is everpresent and what good is a model railway if you can't play with it.