Karel Belčamin, it seems, was not the last RSR engineer to leave behind plans for engines that were never built. Several drawings were found in Šahlmeti's filing cabinets, including this 2-8-4T, which was in effect a stretched version of the 323B, the running gear being adopted more or less unchanged. A Kraus-Helmholtz bogie is provided at the front end. Whether such a locomotive was needed on the RSR in the mid 1920s is questionable (Šahlmeti's rebuilds of the Belčamin 0-8-0s were doing good work, ably supported by the D6A 4-8-0s) and the slim boiler would certainly have proved as inadequate as that of the 323B. It seems that Šahlmeti realised this himself and in the same year produced the fatter-boilered design shown below, which was classed 423QQ. The same question would very likely still have hung over its usefulness, though.

Class 423QQ 2-Cylinder Goods Tank Locomotive
Designed by Bela Šahlmeti ca.1926

Text and graphics © Norman Clubb 2016