The following is a comprehensive history of 20th Century steam on Queensland's Government Railways compiled by Mike Quirk.
Background
Classes
- Engines acquired from Chillagoe Railway & Mining Company
- 4D10 - Ipswich Class
- 4D11½ Abt Class
- 6D11½ Crane Class
- 6D11½ Motor Class
- 6D13 - Originally F - Class
- 6D13½ Abt Class
- 6D13½ later B13½ Class
- 6D16 Class
- 6D17 later D17 Class
- 8D15 Class
- A10 Baldwin - Originally American Passenger Class
- A10 Fairlie - Originally A Class
- A10 Neilson - Originally B Class
- A11 - Originally Large A Class
- A12 - Originally American Passenger Class
- A12 (small) - American Passenger Class
- A14 Class
- AC16 Class
- Australian Standard Garratt
- B11 - Originally C Class
- B11 Baldwin Class
- B12 - Originally E Class
- B13 Class
- B15 Class
- B15con Class
- B16½ Class
- B17 Class
- B18¼ Class
- BB18¼ Class
- Beyer-Garratt Class
- C13 Baldwin Class
- C13 Dubs - Originally Small Consolation Class
- C15 - Originally Large Consolation Class
- C16 Baldwin - Large Consolidation Classba
- C16 Class
- C17 Class
- C18 later CC19 Class
- C19 Class
- DD17 Class
- PB15 (1924) Class
- PB15 Class