Avro 519, 522 and 528

Single seat biplane bomber, based on the Type 510 and unbuilt Type 515, for the RNAS. A conventional two-bay biplane of large, but greatly unequal span, it featured folding wings, ailerons on the upper wings only, an unbalanced rudder and large triangular fixed fin. The pilots cockpit was positioned well behind the wing trailing edge and featured a streamlined headrest. The undercarriage was a scaled up version of the early Type 504, with a central ash skid and an axle in conjunction with two main undercarriage legs having built-in rubber shock absorbers in streamlined cases. The first machine was fitted with a 150 h.p. Sunbeam with side mounted radiators, the second with a 225 h.p. Sunbeam powerplant and a large radiator mounted above and behind the engine.

Two seat biplane bomber variant of the Type 519 for the RFC. Similar to the second Type 519, with a second cockpit located under the wing centre section trailing edge, and featuring a simplified V undercarriage with no skid. One 225 h.p. Sunbeam powerplant and a large radiator mounted above and behind the engine. (See Note 1)

Type 519 Specification
Span	Length	Height	Wing Area	Empty Wt	Max AUW	Cruise Speed	Maximum Speed	Range	Service Ceiling
63 ft	32 ft 9 in	11 ft 8 in	600 sq ft		3000 lb		75 mph/ 65 kn
19.2 m	9.98 m	3.56 m	55.74 m2		1361 kg		121 km/h

Two seat biplane bomber for the RFC. As the Type 519A, but featuring shortened, equal span wings. One 225 h.p. Sunbeam powerplant with the radiators moved to either side of the nose.

Type 522 Specification
Span	Length	Height	Wing Area	Empty Wt	Max AUW
43 ft	33 ft 8 in
13.11 m	10.26 m

Two seat biplane bomber for the RNAS, and used the fuselage of the Type 522 married to new 3 bay unequal span folding wings. Bomb containers were mounted on the lower wings close to the fuselage, holding eight 65 lb bombs. The rear cockpit was fitted with a Lewis machine gun on a ring mounting. The radiators for the 225 h.p. Sunbeam powerplant were now moved to the centre section interplane struts.

Type 528 Specification
Span	Length	Height	Wing Area	Empty Wt	Max AUW
65 ft	33 ft 8 in				5509 lb
19.81 m	10.26 m				2499 kg