AV Dining Car - Under Floor Detail

Underneath the AV Dining Car is another subject of interest, so here is what I found for completion of my model of the AV whilst on a visit to the ARHS Museum.

 

Under floor detail AV 425 from Dining End Corridor side

Under floor detail AV 425 from Galley End corridor side
 

Essentially the detail underneath the Dining car is symmetrically balanced consisting of 4 Battery Boxes, 2 Water Tanks and 2 sets of Brake Gear.

Under Floor AV 426 Model

 

In S scale measurements, Battery Boxes are 37mm long and can be purchased from Railwest as their "Long" battery box. The Water Tanks are 28mm long and can be made from a section of 7.9mm Evergreen tube #230 with some #100 strip for the support straps. Railwest also supply Vacuum cylinders and V hangers to suit.

Av 426 Model Under floor Detail locations

The Battery Boxes and Water Tanks should all fit within the cast areas of the frames . The Water Tanks should be positioned with one end against the center frame casting and hang with 5.5mm of tank exposed/visible below the sole bars.

 

V hangers should be mounted on the external surface of the outside frame with the inside V on the inside frame 2/3rds over the center of the carriage frame. Vacuum cylinders are a close fit to the V hangers with a distance of 7mm between the cross bar and center of the cylinder.

Brake Gear  & V Hangers

The older style carriage Queen posts are also available from Railwest as is .7mm brass rod for the tension bars.

With any luck this information combined with the roof detail information, will enable completion of a few more models of the AV Dining Cars.

 

AV Dining Car - Roof Detail

 

 

 In recent times I have been asked by some members of our group about how I achieved the roof detail and its positioning on my model of the AV Dining Car. This was a problem that I faced back in early 2010 when I was looking to complete my own model of AV 426.

 

 WAGR - AV 426 Dining Car Model
 

Whilst discussing my problem with Rob Clarke who is a member of the ARHS Museum, it was suggested that we could go and measure the real thing at the museum. The agreed day arrived and I met Rob (who had come armed with a ladder) at the Museum and we climbed up onto the roof of AV 425 and carefully set about the task of plotting the positions of the roof equipment.

 

Here is a few prototype pictures showing what is on the roof

 

Kitchen End Stove Vents to right

Looking from Kitchen End over Dining Room

 

Kitchen End showing Galley Vents to left
 

Ok now that you have an idea of what is on the roof, next is to provide the important measurements  & modeling tips. All measurements shown are in millimeters. I have calculated these from the actual 1:1 measurements to suit placement onto the model.

 

To begin with you need to mark out the centerline of the roof.

 

As shown in Picture 1 below - From the kitchen end, measure and mark the positions of the standard Flettner ventilators that run the length of the coach.  

 

 

Picture 2 shows the position of the Stove vents using the first Flettner vent at the kitchen end as the start point for locating. First measure and mark the offset line and then mark the vent positions.

 

  

Picture 3 Shows the location of the Galley Vents again using the first Flettner vent at the kitchen end as the start point for locating. Measure and mark the offset line and then mark the vent positions.

 

 

On the roof I used WestOzModels Flettner Vents for the standard centerline vents

 

 Railwest's brass large carriage vents were used for the stove vents.

These need to have mounting plates to enable them to sit level on the curve of the roof and can be made from laminated styrene sheet or perhaps an old style knitting needle or similar solid rod sliced and filed to suit the arch of the roof. 

 

For the Galley Vents and Water Filler (on the Bullnose end) I used some styrene sheet circles cut to size with a smaller circle with the edges filed or rounded off and then glued on top of the larger circle to represent the lid on top of the mounting plate. To fit on the roof, some light filing with a rounded file will be needed on the bottom of the vent to suit the roof arch particularly on the bullnose end.

 

Here below is a close up picture of the Water filler. The Water filler and the Galley Vents are very similar being mounted with a 6.34mm diameter base. The diameter of the "Lid" is 5.35mm for the Galley Vents and 4.56mm for the Water filler.

 

Water Tank Filler

 

Another feature amongst the Galley vents is the long rectangular vent. Whilst the earlier coaches seem to have been fitted with 5 round vents, it would seem that a longitudinal vent was later fitted presumably for better air collection whilst travelling.

The picture below shows these vents fitted to AV 425,426 & 286. Note that the version on 286 is low and flat compared to the round top versions on 425 & 426.

The measurement for the long vent on AV 425 is 9.52mm Long, 4.36mm wide and 3.37mm high.

I constructed this from 4 sections of 2.5mm sq Evergreen strip styrene glued together and then filed to shape and then I used a dremel with a sharp point bit to mark in some vent veins on the ends

Long Vent

 

Hopefully the information I have provided above will help you all to be able to complete those dining cars you have been working on.

 

As with all of the WAGR carriages there are many variations with fittings etc that will always present us as modelers with a challenge. As always it is best to find a good picture of the prototype you are modeling and follow what you see.

 

A big thank you goes out to Rob Clarke for his assistance with access and measuring of the roof  fittings on AV 425. I promised Rob at the time that this info would be shared with all who may need it and thanks to this blog it has now been possible in a better way than could have been imagined at the time.

 

Handlaid Points

The latest project on my workbench is a No.6 left hand point.  This one uses Code 83 rail (equivalent to 82 lb/yd rail in S scale).

Construction follows the same techniques I have been using for well over 30 years, with real wood sleepers and gluing the rail down with Pliobond adhesive.

Although I usually use Northeastern 12" x 6" HO scale lumber for the sleepers, this time I used precut On3/On2½ "switch ties" by Mt Albert Scale Models in Canada (available from The Railcar near Newcastle, NSW).  The thickness of the Mt Albert sleepers closely matches the On2½ flexible track and points available from Micro Engineering.  Prior to construction, I stained the sleepers with potassium permanganate solution.

The sleeper size and spacing of the Micro Engineering On2½ flexible track and points are just about spot on for Sn3½ track, except that the sleepers are 4-5 mm too long, but that is fairly easily fixed by trimming the ends of the sleepers.  Micro Engineering only makes #5 points in the On2½ range, so handlaying is the only option for other types other than converting HO points "sleeper by sleeper".  They do make a "kit" for No. 6 points consisting of a cast metal frog and machined blades, which could reduce the time and skills needed for handlaying.

American Models Bettendorf Bogies

Bettendorf bogie on a VG van

Another source of bogies for relatively modern WAGR wagons is from American Models.  This company, based in Michigan, USA, make a wide range of S scale standard gauge locos, rolling stock and track.

In the parts section of their web site, they list a number of styles of bogies (or trucks as they call them).  The most useful for WAGR modellers are the Bettendorf freight car trucks and, for some modern Westrail era wagons, the 50-ton roller bearing trucks.

Bettendorf with "scale" wheels

50-ton roller bearing, with "scale" wheels

I first came across the Bettendoorf style when I visited Caboose Hobbies in Denver, during a holiday in the US in 1984.  I bought one pair just to try them.  That was a long time ago and, since then, I have bought two batches of 10 pairs, and asked for the bogies without wheelsets, which cuts the price almost in half.

Of course, the bogies are standard gauge so they have to be narrowed to suit Sn3½.  The Bettendorf bogies are sprung so they can be easily be dismantled - but don't lose the springs.  Kadee make an inexpensive manual uncoupling tool (#241), one end of which doubles as a "spring pic", which I have found useful for removing and inserting the springs.

The basic principle to narrow the bogies is to cut the centre from the original plastic bolster, and rejoin the two halves of the bolster.  For a while, I was using K&S 6.35 mm brass channel to splice the two halves of the bolster back together.  Recently, I went to the local hobby shop to get some more channel and they didn't have any, so I bought some K&S 6.35 mm x 3.2 mm rectangular brass tube instead and that actually worked better.

Original bolster (bottom) and shortened bolster.

The bolster is deeper towards the centre with a slope on both the top and bottom surfaces.  I found that by grinding away the sloping parts with a Dremel motor tool and "plastic" cutting disk, the end pieces of the bolster are a snug fit in the rectangular brass tube.  I found it easier to do the grinding with the original bolster in one piece, before cutting it into three pieces.  Take care not to damage the "bumps" which locate the springs.

A length of between 18 and 18.5 mm seems to work well for the brass tube.  This is based on fitting replacement wheelsets with 26 mm axles.  The bearing holes in the sideframes are quite deep and I don't think 25 mm axles would work as the wheels would rub against the inside of the sideframes.

Cut sections of original bolster with rectangular brass tube.

I drill the centre pivot hole 2.2 mm as this will take a 2-56 screw with minimal slop.  I drill the matching hole in the bottom of the brass tube a bit larger, say 2.5 mm, so that the bogie can rock a little bit from side to side or end to end.  Obviously, it is important to get the pivot holes in the exact centre of the brass tube.

I have also drilled 2 small holes in the underside of the brass tube so that I can use small screws to secure the two halves of the bolster in place although, if they are a tight fit, this may not be necessary.

The bogies I have bought have been "rust brown" in colour so I have have airbrushed them (Revell 9 "Anthracite") before reassembling them.  The current production are available in black, judging by the website photo, which would be better.

The 50-ton roller bearing bogies are not sprung, and are cast in one piece.  I haven't actually used this type, but I have seen some that have been converted to Sn3½ (and there are no springs to lose).

Update - 23 January 2014

To simplify regauging of the Bettendorf bogies, I have designed a new bolster for 3D printing.  The first test prints arrived today and they seem to have worked very well.

Bettendorf bogies with 3D-printed bolsters (grey)

Latest 3D Printed Wagons - WMD and VG

First test print of WMD hopper wagon

First test print of VG covered van

WMC Iron Ore Wagon (and WMD)

My latest 3D-printed model from i.Materialise arrived on Monday, and made its debut at the September AMRA S scale night.  It is a model of a WMC iron ore wagon, the prototypes of which were built for and owned by Western Mining Corporation, and used to haul iron ore from the Koolanooka Hills mine near Morawa to Geraldton.  The mine originally operated for about 6 years in the late 1960's and early 1970's.

I have always liked these distinctive wagons since seeing photos of them hauled by A class diesels in Westrail publicity brochures from the 1970's.  (There is a photo of a long ore train on the Rail Heritage WA site.)

The model includes many details including vacuum cylinders, brake pipes, and the complex gear and chain drive system for closing the bottom discharge doors.  Details to be added by the modeller includes brass wire for the handrails, handbrake levers and two cross shaft which are part of the door mechanism, as well as fine brass chain linking the handbrake levers to the brake linkage.

Later in their long lives, many of the WMC's were converted to WMD class by the addition of hungry boards and were used for carriage of talc, wheat and coal.  A few were converted to WME class after being fitted with a closed steel top, and were used for mineral sands.  See Andy May's wagon pages for more information on the prototype.

The model currently only represents the original WMC design, but I could be persuaded to produce a WMD version with hungry boards if there is sufficient interest.  If I go ahead with the WMD version, the hungry boards would be included in the 1-piece 3D print.  As was discussed at the AMRA S scale night, the WMD version is probably more suitable for running in general traffic over wide areas of the state (see photo at Narrogin), whereas the WMC version ran in block trains in the Geraldton area.

Update:- In the 48 hours since the S scale night, I have created a WMD version with the hungry boards, and a test print of it is on order, which I will hopefully be able to display at the October S scale night.

Computer Rendering of WMD Version

In the 2000's, most have been converted back to iron ore traffic and have been fitted with air brakes rather than vacuum brakes.  The WMC's, now recoded to AHMF, were in active service carrying iron or until early 2013 when they were superseded by more modern wagons as part of the upsurge in iron ore mining in the MidWest area, and are in storage at Narngulu.

Photo by Phil Melling. Taken 24/8/13 at Narngulu

Some of the photos of the model show it in unpainted condition.  They were originally painted grey by Western Mining.  The model pictured is fitted with roller bearing bogies made by Black Diamond Models in Queensland.  These bogies are the closest I have found which are commercially available.  The sample pair of bogies which I have are fitted with Jackson (UK) wheels with steel axles, which can interact with Kadee uncoupler magnets, potentially causing unintended uncoupling.  The sample bogies are quite old and it is not known whether current production bogies have steel axles.  These bogies are cast in white metal (or similar).

I have also drawn up the correct bogies for 3D printing and I am awaiting test prints in three different plastic materials to test their suitability, particularly in terms of strength and stability.

Computer rendering of bogie currently being 3D printed.

Dm 585

Dm 585 4-6-4T

By

 

WestOzModels

 

Here is a few pictures of my latest project. 

This is the prototype model for a WAGR,  Dm class 4-6-4 Suburban Tank locomotive.