With thanks to Tutto Treno Modellismo magazine.
The availability of the FS Gr.640 and Gr.625 classes from Os.kar in HO sparked a strong desire to be able to represent passenger operations accurately with a steam loco. Since the layout I am building depicts a medium-sized terminus, it was necessary to equip it with a turntable as these locos, which, unlike types with bogie tenders such as the Gr.740, very rarely ran in reverse. In reality, a location similar to the layout would presumably have been equipped with a standard turntable with a bridge length of either 9.5m or 15m. The former case, encountered for example in Biella, requires turning the loco and tender separately, a very interesting manoeuvre but difficult to reproduce in model form.
The second case, typical of…