List of Queensland steam locomotives

List of Queensland steam locomotives

Classification
Until 1889, each of the isolated sections of the Queensland Railways adopted its own locomotive numbering system. With the impending joining of most of the sections, in 1890 a new centralised classification system was adopted to eliminate duplications. Locomotives on the Southern & Western Railway retained their existing numbers, with locomotives on other networks renumbered where there was a duplication.

The classification system consisted of a letter, indicating the number of driving axles, followed by a number, indicating the cylinder diameter in inches and factions of inches. This was confusing for two reasons:
 * it differed from the international system
 * it could lead to several classes having the same classification number

Where classification numbers were duplicated, the classes were usually distinguished by the name of the builder, e.g. A10 Baldwin, A10 Fairlie, A10 Neilson.

In the case of tank locomotives, the number of wheels was added as prefix, e.g. the 6D16 class had six wheels. When all four wheel tank locomotives, the prefix was dropped, thus the 6D16 class became the D17 class.

Improved versions of a similar class were given a second identical letter. For example, the improved version of the D17 was the DD17.

Classes

 * 4D9 class
 * 4D10 class
 * 4D11½ Abt class
 * 6D8½ class
 * 6D11½ Crane class
 * 6D11½ Motor class
 * 6D13 – Originally F – class
 * 6D13½ later B13½ class
 * 6D13½ Abt class
 * 8D11 class
 * 8D15 class
 * 6D15 class - A single modified PB15 class
 * 6D16 class
 * 6D17 later D17 class
 * 8D15 class
 * A10 Avonside
 * A10 Baldwin – Originally American Passenger class
 * A10 Fairlie – Originally A class
 * A10 Ipswich
 * A10 Neilson class – Originally B class
 * A11 class – Originally Large A class
 * A12 class – Originally American Passenger class
 * A12 (small) class – American Passenger class
 * A14 class
 * AC16 class
 * Australian Standard Garratt
 * B9½ class
 * B11 class – Originally C class
 * B11 Baldwin class
 * B12 class – Originally E class
 * B13 class
 * B13 Baldwin class
 * B15 class
 * B16½ class
 * B17 class
 * B18¼ class
 * BB18¼ class
 * Beyer-Garratt class
 * C13 Baldwin class
 * C13 Dubs class – Originally Small Consolation class
 * C15 class – Originally Large Consolation class
 * C16 Baldwin class – Large Consolidation class
 * C16 class
 * C17 class
 * C18 later CC19 class
 * C19 class
 * DD17 class
 * Double boilered Cross class
 * PB15 (1924) class
 * PB15 class