Avro 521
නිෂ්පාදකයාAvro
තවම පරිවර්තනය කර නැත — ඉංග්රීසියෙන් පෙන්වයි.
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.
