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.