It was a conventional two-bay biplane of greatly uneven span, equipped with two large central floats and two outriggers.

The race was called off at the outbreak of the First World War, but the British Admiralty was aware of the type and ordered five examples, with modified floats and tail.

In service, these proved completely unsuitable, and it was discovered that with a second person aboard, the aircraft could barely fly.

[1] Data from Avro Aircraft since 1908[2]General characteristics Performance

a Most sources give the powerplant of the 510 as a Sunbeam Nubian, an engine that would not yet exist until all the 510s had been withdrawn from service in 1916.