/ Blackburn Dart/Swift/Velos
The Blackburn Dart was a carrier-based torpedo bomber biplane designed and manufactured by the British aviation company Blackburn Aircraft.
It was the standard single-seat torpedo bomber operated by the Fleet Air Arm (FAA) between 1923 and 1933.
Work on what would become the Dart started in 1919 as a private venture.
Originally known as the T.1 Swift, it performed its maiden flight in September 1920.
Three aircraft were ordered for evaluation purposes to fulfil Air Ministry Specification 3/20, which received the name Dart.
First flown in October 1921, its performance quickly impressed officials and a production order was issued to Blackburn on behalf of the FAA.
The Swift name was retained for the pursuit of export sales.
Limited quantities were supplied to multiple overseas operators, including the Japanese Navy, Spanish Navy, and the United States Navy.
Additionally, Greece opted to procure a modified seaplane variant of the aircraft, the Blackburn Velos, which was operated by the Greek Navy as a torpedo bomber.
Prototype torpedo bomber, one built.
Prototype, one built.
Initial production variant, 117 built
(Three converted to two-seat trainers)
Swift Mk II
Export version, seven built.
US Navy designation of the Swift Mk II for evaluation
(Would have been designated the BST-1 if ordered).
Two-seat variant for the Greek Navy, 16 built
(12 under licence in Greece).
Company demonstrator and trial aircraft, six built.
35 ft 4+
in (10.782 m)
45 ft 5+
in (13.862 m)
12 ft 11 in (3.94 m)
654 sq ft (60.8 m
3,599 lb (1,632 kg)
6,383 lb (2,895 kg)
1 × Napier Lion IIB W-12 water-cooled piston engine,
450 hp (340 kW)
465 hp (347 kW) Lion V
2-bladed fixed-pitch propeller
107 mph (172 km/h, 93 kn) with dummy torpedo at 3,000 ft (914 m)
100 mph (160 km/h, 87 kn)
43.5 mph (70.0 km/h, 37.8 kn)
410 mi (660 km, 360 nmi)
12,700 ft (3,900 m)
Rate of climb
600 ft/min (3.0 m/s)
1 × fixed, forward firing Vickers machine gun (not Mk II)
1 × Lewis gun in rear cockpit.
1 × Mark VIII or IX, 18 in (457 mm) torpedo
Up to 2 × 520 lb (236 kg) bombs under each wing.
Imperial Japanese Navy (Swift Mk.II)
Royal Air Force
Royal Naval Air Service
Spanish Navy (Swift Mk.II)
United States Navy (Swift F)
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