| R.B.3A Perth | |
|---|---|
 A Perth, flying with the MAEE in 1935 | |
| General information | |
| Type | Flying boat |
| Manufacturer | Blackburn Aeroplane and Motor Company |
| Designer | |
| Primary user | Royal Air Force |
| Number built | 4 |
| History | |
| Manufactured | 1933–1934 |
| Introduction date | 1934 |
| First flight | 11 October 1933 |
| Retired | 1938 |
| Developed from | Blackburn Iris |
The Blackburn Perth was a British flying boat which was in service during the interwar period. It was essentially an upgraded Iris, and hence the largest flying-boat to serve with the Royal Air Force at the time (and the largest biplane flying boat ever to serve with the RAF).