First flown in December 1918, and too late to participate in the war, the Avro 533 Manchester represented a final development of the Avro 523/529 concept. Generally similar to the Avro 529A, with the engines mounted on the lower wing, the design incorporated some refinements including a deeper fuselage, balanced ailerons, and an improved tail unit. The 533 had been designed around the A.B.C. Dragonfly radial engines. When these failed to materialise through development problems, two 300 hp / 224 kW Siddeley Puma were installed, the result being designated Avro 522 Mk.II. Thus, the Mk.II was to fly before the Dragonfly-engined Avro 533 Mk.I.
Both versions flew well in official tests but with the end of the war neither were produced.
A Mk.III was planned with 400 hp / 298 kW Liberty engines, but although the fuselage was completed, the engines were not installed.
Avro 533 Mark I
Engine: 2 x 320hp ABC Dragonfly I
Wingspan: 18.29 m / 60 ft 0 in
Length: 11.28 m / 37 ft 0 in
Height: 3.81 m / 13 ft 6 in
Wing area: 75.53 sq.m / 813.00 sq ft
Take-off weight: 3355 kg / 7397 lb
Empty weight: 2219 kg / 4892 lb
Max. speed: 209 km/h / 130 mph
Climb to 10,000 ft / 3050 m: 14 min 20 sec
Ceiling: 5791 m / 19000 ft
Endurance: 5 hr 45 min
Crew: 3
Armament: 2 x 7.7mm machine-guns, 400kg of bombs
All Aero 