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LNWR, Observation car project, 4mm

LNWR Observation Car 4mm OO 3D Research 1913 Bluebell Railway



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#1 Bluebell Model Railway

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Posted 17 August 2018 - 10:56

LNWR, Observation Car, OO

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Welcome to this LNWR rolling stock build or should that be design. I don't normally enter competitions as the standard is very high especially here, but as I had this started, I thought it would encourage me to finish it.

This journey started two years ago, replacing some old scratch built items, one of which is the LNWR observation car, I obviously by my username model the Bluebell Railway, and one item of rolling stock is usually on the end of set's every time I attend.

So why this particular carriage? As far as I am aware there is no kit for this particular coach in 4mm or OO, instead of scratch building this, I feel not just to benefit me, but others also I would try go down the 3D print route, but this means a lot of research, and the best way to go about it.
 

Two years ago, I started researching, contacting the LNWR society for any available drawings of the observation car, they managed to find one, but no measurements. Thanks to some contacts on the Bluebell Railway, they kindly helped me out with detailed photo's and a few measurements.

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(A selection of research images)

With basic measurements I could start building the coach in CAD, for this I turned to a nice simple 3D software Google Sketchup, I am not an expert at 3D design, and I am sure someone who is more experienced than I could do a better and faster job, which is why it took 2 years. This model will be printed to 4mm scale OO, which is what I model in.

Due to its length and complexity the body was divided in to 3 sections, 2x ends, and 1x middle, details for the roof were added details, as well as an interior were all printed separately, to aid quality. The chassis was printed in a different material which will be dyed black, to aid painting, this is a flexible nylon material, which has similar characteristics to plastic but just cannot do the detail.
 

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(Some completed CAD's showing the main sections)

 

More soon next time.

 


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#2 Bluebell Model Railway

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Posted 21 August 2018 - 11:51

The body CAD was sent off to a home 3D printer using a 3D print hub, for a quick and slightly cheaper turn around, this was printed in grey resin, using a the SLA printing process. Took about 3 days to print the whole lot, which isn't bad going. The print was not bad at all, and didn't show too many print lines, and all the detail came out quite well including the handles on the top of the seats, crazy! But amazing!
The print was cleaned and all supports removed before it arrived with me, which save me a lot of time. I did however clean it again, and sanded any areas that required some cleaning up with fine wet and dry.
The chassis plus details arrived from Shapeways a week later, and again wasn't a bad print thanks to the new customer or designer tools where I get a say which way round the model is printed.
Some of the smaller items, roof vents, and buffers, I printed extra ones, as you never know when it may get an unfortunate tap and something breaks.
The body was test fitted together making sure all 3 sections were square and fitted together nicely.
 

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(Complete print, 3 body sections, 3 lots of seats, 1 chassis, roof and chassis detail, some spare parts included in the smaller details.)
 


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#3 Tim Hall

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Posted 22 August 2018 - 07:16

Excellent, was riding in this behind Bluebell yesterday.



#4 Bluebell Model Railway

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Posted 22 August 2018 - 08:59

Excellent, at least you can tell me if I got it right or wrong hehe.

Its been a long time since I've been there 4 years nearly, maybe 5 since I actually travelled on that particular carriage.

Still enjoy doing the research on these carriages the other I'm working on is also up to 2 years.

Edited by Bluebell Model Railway, 22 August 2018 - 09:02 .

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#5 Bluebell Model Railway

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Posted 03 September 2018 - 23:51

The main job on this 3D printed kit was to fit out the chassis, as it's just the basic shape with no detail like vacuum pipes or truss rods so this needs to be made up. The truss rods and the supporting rods were made-up of 0.8mm brass rod and soldered together.

The battery or electrical boxes also required some extra detail small rods were required around them, small holes were drilled in the tabs I had made on the CAD as these were made with holes but are way too small to actually print, so had to be re-drilled.
The lower footboards were made with 0.5mm brass rod and some brass sheet, again soldered together.

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(Plan transferred to paper from the CAD drawing, then made in to the brass.)


 


Edited by Bluebell Model Railway, 03 September 2018 - 23:52 .

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#6 Compound2632

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Posted 04 September 2018 - 17:23

Coming along nicely!


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#7 Bluebell Model Railway

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Posted 05 September 2018 - 00:14

Thanks Stephen yes getting there slowly especially writing it up, thanks again for your help on the transfers.

#8 DLT

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Posted 11 September 2018 - 16:54

Lovely job Matt, being such a well-known vehicle, I'm amazed there isnt a kit for it.

Cheers, Dave.



#9 Bluebell Model Railway

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Posted 11 September 2018 - 17:00

Hi Dave,
Yes I'm surprised too, when I built the other one which was... 5 years ago I think there was nothing... I checked again this year.. Found an O gauge kit but nothing in 4mm sadly...

Shame it's a nice coach
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#10 Mallard60022

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Posted 12 September 2018 - 12:01

Hi Dave,
Yes I'm surprised too, when I built the other one which was... 5 years ago I think there was nothing... I checked again this year.. Found an O gauge kit but nothing in 4mm sadly...

Shame it's a nice coach

If you speak nicely to Worsley Works they might consider it. They do the LNWR Director's Saloon.

This is a lovely looking project by the way.

Phil


Edited by Mallard60022, 12 September 2018 - 12:04 .


#11 Bluebell Model Railway

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Posted 12 September 2018 - 14:44

Yes already building one of Worsley works models not for the faint hearted... In fact 3d printing the kit I'm currently working on (not LNWR), it has been cheaper... And less hastle trying to find all the missing parts.
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#12 Bluebell Model Railway

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Posted 16 September 2018 - 15:50

So the bogies, obviously I never printed any bogies, and as the print is rather light, I wanted to keep the weight as low down as possible, so I wanted some white metal bogies. There is also openings in the battery boxes for additional weight if required.

I ordered a pair of bogies from 247 Developments, and added my own NEM pocket for standard Hornby or Kadee couplings. The bogies were fitted with the standard 13mm wheel size, with brass bearings. The bogies will be secured with some Hornby self tapping screws as the chassis is made out of nylon, it will tap a thread in to that quite nicely.
I added a 1mm plasticard schim on the bogie as it was sitting quite low in the chassis, so a small modification on bogie boss on the CAD for the chassis.
 

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(Bogies, soldered together, with coupling pocket, after an addition of a schim to raise the chassis they were primed)


 


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#13 Baldwin30762

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Posted 01 October 2018 - 15:36

I was looking at this and thinking I wonder if the 3d parts are available from shapeways yet?

 

Colin


Edited by Baldwin30762, 01 October 2018 - 15:37 .


#14 Bluebell Model Railway

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Posted 01 October 2018 - 17:24

They are available, 2 have been sold when it went live, but it's certainly not cheap.
I have purchased a printer to bring the body shell price down.
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#15 Atso

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Posted 05 October 2018 - 09:30

Hi Matt,

 

That sounds very interesting, what printer have you purchased?



#16 Bluebell Model Railway

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Posted 07 October 2018 - 23:25

Hi Matt,

 

That sounds very interesting, what printer have you purchased?

Hi Steve,
 Sorry for my late reply I have been chasing transfers, and etches not for this particular model but other ones.
 

 Its a DLP printer, I think one or 2 others have a similar one, but spent a bit more to have the extra height, to fit in one particular coach, I haven't fired it up yet and given it a go as I am waiting to set up a little area to print, clean ect....  So we shall see.

Hopefully have an update on this thread soon!


 


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#17 Mallard60022

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Posted 14 October 2018 - 05:40

Yes already building one of Worsley works models not for the faint hearted... In fact 3d printing the kit I'm currently working on (not LNWR), it has been cheaper... And less hastle trying to find all the missing parts.


Your LSWR (Edit) LBSC build article is not in the October Paper. Pah!


Edited by Mallard60022, 14 October 2018 - 17:44 .


#18 Bluebell Model Railway

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Posted 14 October 2018 - 09:10

Your LSWR build article is not in the October Paper. Pah!


Didn't know I was building an LSWR carriage.. Certainly building an LBSC, LNWR sadly everything takes time..
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#19 Mallard60022

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Posted 14 October 2018 - 17:43

Didn't know I was building an LSWR carriage.. Certainly building an LBSC, LNWR sadly everything takes time..

Sorry I meant the Director's Saloon ..... LBSC. My age you know. I also thought you had submitted further info for the second article and yes, I understand fully, things take time, or in my case they take years and years and years......... :scared:

P


Edited by Mallard60022, 14 October 2018 - 17:45 .


#20 Bluebell Model Railway

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Posted 14 October 2018 - 17:54

Yes that's been delayed the LBSCR due to transfers but that's been sorted now that's been on going since July.. So maybe December's issue.

There are 3 others to write but all down to time plus building this one as well.
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Also tagged with one or more of these keywords: LNWR, Observation Car, 4mm, OO, 3D, Research, 1913, Bluebell Railway