This Hunslet Narrow gauge engine was my fifth engine.  It was used in the first world war behind the lines.  There have been other versions and I did think of doubling up the 3.5" version.  I finally bought a G.A. drawing from the Leeds Industrial Museum and used this as a basis for all my dimensions.  There are various widths for the original track.  The war time track being 60cm. The book below gives a detailed description of the problems in selecting the scale to arrive at the best size for me and my trailer.

Once again I went for the cheaper option of a steel boiler.  I also tried roller bearings using hardened EN8 axles. Full size roller bearings were just too big. The original would no doubt have been a dirty black but who wants to see an engine that colour?  The Australian museum has one of the few engines left and has some excellent photos.  Not long before I began my next engine; the Graf Schwerin Lowitz, by Arnold Jung - Germany.

The boiler is of a Belpaire design (flat top over the firebox) to give more water above the fire.  This was the first the boiler maker had been asked to make and it had to be ratified by Lloyds of London before it could be stamped with their letter 'L' on the back plate.

Should you think about making this engine, I would recommend a copper boiler.  Although more expensive, because of the thickness of the steel plate, the grate area would be larger making it easier to fit as well as improving performance.  Although much more complicated than the 'George Henry', it is an easier engine to build.

On the 'Download' page there are more buttons for the FREE set of drawings. Once again, there are no restrictions, just acknowledge my efforts. 

Click on the ikon in the top right corner will open a printable version of the original book written as a building diary.