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 miniature live steam, coal fired locomotives for passenger hauling. Currently I'm working on a 7¼" gauge, scale 1:8, German T3 steam locomotive.

In 2006 I started this new project. This is a small 0-6-0 branch line locomotive of the German KWStE (Königlich Württembergischen Staatseisenbahnen) origin with outside cylinders and Walschaerts valve gear. The loco is about 1.10 metre long and will weigh 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.

Sunday, 10 February 2013

''Choice of Model"

Photo Harald Frank

The locomotive
This new project will be published on this site as progress gets along. The locomotive is a German Württembergische T3 which I'm designing with the aid of  3D cad software.  I've bought a model of the loco from Brawa. This H0 fine scale model, a book of the loco  and some photos of the preserved locos are the basis for this 7.25" design.
For its scale (1:8) this is a quite small locomotive, with the benefit that it hopefully still can be handled in my workshop. A larger loco on 7.25" 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. Although the small size of this loco there are several 7.25” versions of the Prussian T3 and they are all very good performers on the track. They are in main dimensions very similar to this Königlich Württembergische Staatseisenbahnen (KWStE) version and as in real live these is also derived from the Prussian T3.
With an overall length of just under 1.10 meter and a weight of around 100kg the model should be able to do some work on a ground level track and it still can be transported in 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.

A preserved Württemberigsche T3
Frame in Inventor 2006

General view in Inventor

Switch to Solidworks 2007

Solidworks Photoview 2010

Solidworks 2011

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


I've started with the 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 (KWStE). Luckily few are still preserved in Germany.

Testing the frame at the track of the SMMB in Tilburg march 2011
At Steamday Stoomgroep Zuid in Loon op Zand march 2012
At Stoomgroep Stormpolder in june 2012

At Loon op Zand Exhibitoin  march 2013

The drawing in Solidworks January 2016