| Name: | RIACHUELO |
| Type: | Battleship |
| Keel: | n/a |
| Launched: | n/a |
| Completed: | n/a |
| Builder: | Armstrong, Whitworth & Co |
| Yard: | High Walker |
| Yard Number: | 879 |
| Dimensions: | 30500disp, 620.0 x 94.0 x 28.0(draft)ft |
| Engines: | 4 x Steam turbines, 24000shp |
| Engines by: | Vickers Ltd |
| Propulsion: | 4 x Screws, 22.5knots |
| Construction: | Steel |
| Armament: | 4 x 2 x 15.0ins, 14 x 1 x 6.0 ins, 10 x 1 x 4ins, 4 x 1 x 3pdr guns, |
| 4 x 1 x 3pdr guns; 1 x 2 x 21.0ins torpedoes | |
| History: | |
| Government of Brazil | |
| Cancelled | |
| Comments: | 14/05/1914: Ordered by the Government of Brazil |
| 10/09/1914: Keel laying scheduled but did not happen | |
| 14/01/1915: All work ordered to be stopped by the British Goverment | |
| 13/05/1915: Contract cancelled |