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| 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 served 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).