Live steam model on 7¼" gauge of the Württembergische T3 no 924

Welcome to this blog. It will inform you about the progress of designing and building a miniature German 0-6-0 live steam, coal fired locomotive for passenger hauling on 7¼" gauge, scale 1:8.

The model was started in 2006 and first ran under its own steam in 2017. It is a small T3 branch line locomotive of the KWStE origin (Königlich Württembergischen Staatseisenbahnen), with outside cylinders and Walschaerts valve gear. The model loco is about 1.10 metre long and weighs approx. 100 kg.

On the left you'll find the index where you can browse through the different articles and on the right you'll find all the extra's. On the top tabs you'll find a brief description of my other locos.

Enjoy this site. Erik-Jan Stroetinga. The Netherlands. Europe.

Click for direct link to start of construction series of: T3 7¼" steam locomotive or Open goodswagon Omk or Beer wagon

Württembergische T3 on 7¼" gauge

The choice of the Model

The locomotive
This project started in august 2006 and will be published on this website as progress gets along. The locomotive is a 7¼" gauge live steam model of a German Württembergische T3 (0-6-0) which I'm designing with the aid of  3D cad software and building in my workshop.  

The complete CAD file of the loco and wagons can be downloaded for free from:

At Petit Train Vapeur Forest in Brussels October 2018 (Photo by Arif Kavak)

I've bought a H0 scale model of the loco from Brawa. This H0 fine scale model, a book of the loco  and photos of the preserved locos are the basis for this 7¼" gauge design. 
Even on this scale (1:8) it is a quite small loco, with the benefit that it can be handled in my home workshop and will fit in boot of my car. A larger loco on 7¼" gauge would be too much for my small workshop. And in my opinion most model live steam tracks in the Netherlands have the size of a branch line rather than a main line. 

The finished model on track at Barendrecht 6 may 2018

Testing the loco on a two day steam event; click here for a full report

My son Martin is happy with the result so far. The locomotive was taken to the track of PTVF in  Brussels on october 2017;  first real test on the track after 11 years of construction.
Still not fully completed; a  working steam pump and some details as a builder's plate on the dome and glazing are to be made. The loco lamps need a bit of detailing and must be painted before they can be put on the loco.

Earlier the 7¼" model, as it was in May 2015 at Turnhout (Belgium)  ; The running gear, cab, tanks, boiler are complete.  Boiler cladding and pipe work  had to be made. You'll find progress of the locomotive on the blogs of this website.

The works photo from the manufacturer. They were built at the locomotive works in Esslingen and Heilbronn for the Königlich Württembergische Staats-Eisenbahn between 1891 and 1913.   The loco I'll be building has the running number 924 and was built in 1907 by Maschinenbau Gesellschaft Heilbronn with works number 489.  German locomotives we usually not named.

 110 examples in total were build, four of them are preserved. 

Although the small size of this loco there are several 7¼” gauge versions of the Prussian T3 and they are all very good performers on the track. Prussian T3's are in main dimensions very similar to this Königlich Württembergischen Staatseisenbahnen (KWStE) version and, as in real live, these is also derived from the Prussian T3. Here you see the Prussian T3 of Thomas Adler on 7¼ gauge

The Prussian T3 of which the Württembergische design is derived (SWZ 2012).

The model with an overall length of just under 1.10 meter and a weight of around 100kg, should be able to do some work on a ground level track and it still can be transported in the our family car.

The choice of the model

(Click on the small images to get a larger view)
It all started with the plan to build a small Stroudley Terrier A1 class 0-6-0 loco called New Port and designed by Don Young. A nice little engine on 7.25"gauge (184mm) as a next project after the 'Didcot'.
The wheel castings for this loco were (and still are)  however exceptional expensive at Reeves2000. Over 600,-- Euro for six wheels
, ex. postage & package.
I was talking about this with a German  model engineer, whom I'd met at the annual steam meeting in Den Haag ZuiderparkWolfgang told me he had some wheel castings,  drawings, cylinders, chimney and lots of other bits and pieces for a German 7.25" gauge  T3 (see this video)  he was not using any more.
An appointment was quickly made and within a few weeks I was the proud owner of a complete set of castings for 
7.25" gauge locomotive. The drawings and castings came from Live Steam Service.

This Prussian T3  is very nice loco indeed, but in a small book I read about a variation on this design, the so called Württembergische T3 (89 3-4). All the parts could be used, only a new drawing had to be made. This gave me the opportunity to incorporate some ideas from earlier experiences with previous model locomotives and to get some hands-on experience with 3D solid modelling software like Inventor and Solid works.

Foto by Harald Frank 

The  preserved Württemberigsche T3 930

Drawing and designing was done in 3D CAD software.  This was a great aid during design and construction.
Also data of the drawings could be used for laser cutting and CNC milling.  
I started the frame in Inventor 2006. This start of the locomotive.

General view in Inventor; most general dimensions were actually taken from the Brawa H0 scale model.

A switch to Solidworks 2007 was made; this was the software we were starting to use at our university of applied science (Fontys Eindhoven)  and it gave me the opportunity to learn Solidworks 'on the job' . 

A general arrangement of the T3, with the original short side tanks. These were later extended towards the smokebox. 

A very nice model in 0 gauge (1:45) by Fritz Müller.

I've started with the very good book of  "Die baureihe 89 3-4" by Werner Willhaus (EK-Verlag)
which include a few very clear drawings and plenty of photographs of the locomotive during is 
existence. The first was built in 1891 for the Königlich Württembergische Staatseisenbahnen 
(K.W.StE). Luckily a few locos of this class are still preserved in Germany.

Testing the frame at the track of the SMMB in Tilburg march 2011

At the Voorjaarsstoomdag of  Stoomgroep Zuid in Loon op Zand,  March 2012  (photo by Eric Bruinewoud)
This is the annual model engineering exhibition of Stoomgroep Zuid, of which I'm a member.

At Stoomgroep Stormpolder on June 2012

One of the preserved Württembergische T3  no. 930 back in steam on september 2013

Photo by Harald Frank

The newly restored Wü T3 no. 930 in steam in 2014. To see this loco in steam: click here

May 2015

The Solidworks drawing of the locomotive (as it is) can now be downloaded here at 

The almost completed T3 is standing at the station sidings. 
In my workshop the locomotive is big, but once on the track is only a small engine. 

Testing: the loco pulled along track; no problems with points and crossings.

The H0 and gauge 1 set

The loco with driving and tool wagons

The first steaming of the loco on 17 September 2017

Breda 17 September 2017

Brussels at the PTVF October 2018
Read all about the construction of this locomotive on this blog. 

Den Haag SWZ,  June 2019

The first wagon, the driving truck completed in june 2020. A start for the second wagon is made.

Stuttgarter Hofbräu Bierkühlwagen.  Finished in April 2021. Read all about this beer wagon HERE

The Märklin train set at Stoomgroep Limburg (Brussum NL) 27th  June 2021

On the same day, 27th June 2021, the real Württembergische T3 made its first appearance in the new black-grey livery.  

In Germany (Münsingen) the locomotive is now painted in the same RAL 7021 Schwartz-Grau colour as my model. 
The Schwäbische Alb Bahn contacted me about the livery of my model and which sources
 I used to determine the colour. I pointed them to the websites and books I've found and they
 decided to use the black-grey livery as well. 
So in this case the model of the loco is the example for the real one. The extra windows in the cab front are now also incorporated on the real loco. 

With the kind permission of  Manuel Walker, I  hereby publish the photos of the T3. 
T3 at Müsingen  station (Germany)

Click below for direct link to start of construction series of: