What is WAGR Os class?
{{no sources|date=October 2023}} The '''WAGR Os class''' were a total of 5 experimental [[Steam locomotive|steam]] [[Locomotive|locomotives]] operated by the [[Western Australian Government Railways]] (WAGR) from 1915 to 1937. The Os class were the result of superheated [[Boiler|boilers]] being fitted to Nos. 81 (later 210), 94, 99, 212, and No. 220 with [[Sir Vincent Raven]]'s patent bypass [[valve]] also fitted. By 1937 all had been converted back to standard O class locos, though Os boilers were later exchanged with [[WAGR N class|N class]] ones. [[Category:Western Australian Government Railways locomotives]] {{Transport-stub}} {{Technology-stub}}