Class 533D
3-Cylinder
Express Goods Locomotive
Designed by Jochann Ketterik in 1962
Throughout the
1950s,
the bulk of express passenger traffic was in the hands of Tešlov's
4-6-2 rebuilds
and his new 4-8-2s of 1950, which were essentially a passenger version
of the 533A. It was Ketterik's idea to produce a new engine to serve the
RSR
for the coming quarter century. The history of the steam locomotive is littered
with projects where a new chassis was placed under an existing boiler. The 533D
was no exception. Although it utilised the excellent boiler of the 434D and
other modern features such as poppet valves, roller bearings and boxpok wheels,
the 533D was totally superfluous to requirements and was therefore not authorised. The Tešlov class 533C, only
eight years old, was coping admirably with the steadily growing volume of RSR
heavy goods traffic and the 533Bs were taking care of the rest. The RSR simply
didn't need another heavy goods engine, as Ketterik must have known, and so he
was quite unfazed by this turn of events. Also, the 533D was very much a
mix-and-match design which required very little effort to produce. In the event,
the RSR did not acquire another ten-coupled goods engine until 1975.
Text and graphics © Norman Clubb 2012