Avro 519

The Avro 519 was a British bomber aircraft of the First World War, a development of the Avro 510 seaplane, built as a two-bay biplane of conventional layout and greatly uneven span. Two single-seat examples with a 150 hp Sunbeam water-cooled engine were ordered by the RNAS in early 1916, followed by orders for two modified aircraft for the Royal Flying Corps with seats for a crew of two and more powerful 225 hp Sunbeam engines. The first of those was designated 519A, and the second differed enough to receive a new number, 522, with new wings of equal span in the hope of curing poor climbing performance. None was used operationally, all four served for flight testing, and the last was still in service in April 1917.