Avro 521

Avro 521
Role Fighter
Manufacturer Avro
First flight late 1915
Number built 1

The Avro 521 was a British two-seat fighter first flown in late 1915, based on the 504. Only a prototype of the Avro 521 was built. It was powered by a 110 hp (80 kW) Clerget engine, with provision for a .303 in (7.7 mm) Lewis Gun in the rear cockpit.