Blackburn Perth
The Blackburn Perth was a British flying boat in service during the interwar period. It was an upgraded Blackburn Iris, 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).
The Blackburn R.B.3A Perth was designed as a replacement for the earlier Iris to Air Ministry Specification 20/32. Developed from the Iris Mk. V, the Perth first flew in 1933. It differed from the Iris by replacing the Rolls-Royce Condor engines of the Iris by more powerful Rolls-Royce Buzzards and having an enclosed cockpit for the pilots. Unusually, in addition to its normal armament, the Perth was fitted with a Coventry Ordnance Works C.O.W 37 mm (1.46 in) autocannon in its bows.
Four Perths were ordered for service for the RAF.
Blackburn Perth K4011 Blackburn Perth K4011 Blackburn Perth K3580 Blackburn Perth Blackburn Perth K4011 Blackburn Perth Blackburn Perth Blackburn Perth Blackburn Perth K3580 Blackburn Perth Blackburn Perth K3580 Blackburn Perth Blackburn Perth Blackburn Perth Blackburn Perth Tail Gunner’s Position Blackburn Perth Front Gunner With 37mm cannon Blackburn Perth