page_title: Hawker Hart
section_title: Osprey
hierarchical_section_title: Hawker Hart / Variants / Osprey
caption_attribution_description: Hawker Osprey starting from Swedish aircraft crusier Gotland
context_page_description: The Hawker Hart was a British two-seater biplane light bomber aircraft of the Royal Air Force. It was designed during the 1920s by Sydney Camm and manufactured by Hawker Aircraft. The Hart was a prominent British aircraft in the inter-war period, but was obsolete and already side-lined for newer monoplane aircraft designs by the start of the Second World War, playing only minor roles in the conflict before being retired.
  Several major variants of the Hart were developed, including a navalised version for the Royal Navy's aircraft carriers. Beyond Britain, the Hart would be operated by a number of foreign nations, including Sweden, Yugoslavia, Estonia, South Africa, and Canada.
context_section_description: The Hawker Osprey was the navalised carrier-borne version of the Hart, performing in the fighter and reconnaissance roles. The Osprey had a single Rolls-Royce Kestrel II engine, and had a max speed of 168 mph (270 km/h). Its armament consisted of a single forward .303 in (7.7 mm) Vickers machine gun and one .303 in (7.7 mm) Lewis gun. The Osprey joined the Fleet Air Arm (FAA) in 1932, with 103 being built, and ended its career in 1944 after serving as a trainer for FAA pilots during the Second World War. By December 1936, Ospreys were being deployed by 701 Squadron based at RAF Kalafrana in the anti-submarine and anti-piracy role. The Osprey was also sold to the Swedish Air Force being used on the seaplane cruiser HSwMS Gotland, which carried six Ospreys. Ospreys were also sold to the Portuguese Naval Aviation and the Spanish Republican Air Force.
  Osprey I
  Two-seat fleet spotter and reconnaissance aircraft, powered by a 630 hp (470 kW) Rolls-Royce Kestrel IIMS inline piston engine; 37 built.
  Osprey II
  Two-seat fleet spotter and reconnaissance aircraft, powered by a 630 hp (470 kW) Rolls-Royce Kestrel IIMS piston engine, equipped with redesigned floats; 14 built.
  Osprey III
  Two-seat fleet spotter and reconnaissance aircraft, powered by a 630 hp (470 kW) Rolls-Royce Kestrel IIMS piston engine, equipped with a dinghy stowed away in the starboard upper wing; 26 built.
  Osprey IV
  Two-seat fleet spotter and reconnaissance aircraft, powered by a 640 hp Rolls-Royce Kestrel V. Twenty-six built in 1935.
  Portuguese Osprey
  Two aircraft equivalent to Osprey III built for Portugal and powered by Kestrel IIMS piston engine. Delivered in 1935. Six aircraft more in 1939.
  Spanish Osprey
  One aircraft fitted with a Hispano-Suiza 12Xbrs engine; one built for the Spanish Republican Air Force.
  Swedish Osprey
  Version for Sweden fitted with a 600 horsepower (450 kW) Swedish-built NOHAB Bristol Mercury radial piston engine and interchangeable wheel and float landing gear. Six built. Given the designation S 9 by the Swedish Air Force.
caption: A Swedish Osprey ready to launch from the cruiser HSwMS Gotland
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