Hawker Hart

Hawker Hart. The Hawker Hart was a pioneering British two-seat light bomber aircraft that became a cornerstone of the Royal Air Force during the interwar period. Designed by the renowned Sydney Camm, it entered service in 1930 and was celebrated for its exceptional speed and agility, which often surpassed contemporary fighter aircraft. Its success spawned a prolific family of variants and derivatives, cementing Hawker's reputation for producing robust and effective military aircraft.

Development and design

The Hart emerged from Air Ministry Specification 12/26 for a new light day bomber to replace the aging Airco DH.9A. Sydney Camm and his team at Hawker Aircraft in Kingston upon Thames created a design centered on the newly available Rolls-Royce Kestrel liquid-cooled V12 engine. This powerplant, combined with Camm's signature metal structure fabric-covered design philosophy, resulted in an aircraft with a remarkable performance edge. Its construction utilized a steel-tube fuselage frame and duralumin wings, a method perfected at the Brooklands facility. The prototype, powered by a Rolls-Royce F.XI engine, first flew in June 1928, demonstrating speed superior to the Royal Air Force's frontline fighter, the Hawker Fury. This performance advantage led to an immediate production order, with manufacturing also undertaken by Armstrong Whitworth and Vickers-Armstrongs.

Operational history

Entering squadron service with No. 33 Squadron RAF in 1930, the Hart quickly became the standard light bomber of the RAF, equipping numerous units at home and across the British Empire. It saw extensive active service in colonial policing roles, particularly during the Third Anglo-Afghan War and on the North-West Frontier with India. The type also formed the backbone of the Royal Air Force's bomber force during the early 1930s, participating in annual Army Co-operation exercises that demonstrated its tactical value. Although largely obsolete by the outbreak of the Second World War, Harts saw limited second-line service in communications and training roles. Overseas, the type saw combat with the Swedish Air Force and the South African Air Force, with the latter using it in the East African Campaign against Italy.

Variants

The basic Hart design proved exceptionally adaptable, leading to a wide array of specialized models. The principal bomber variant was the Hart India, modified for tropical service. The Hart Trainer was a dedicated dual-control version for instruction. A significant radial-engined adaptation for army co-operation duties resulted in the Hawker Hector. The most direct and improved successor was the Hawker Hind, which featured a more powerful Kestrel V engine and became the last of the RAF's biplane light bombers. Other notable derivatives included the Hawker Osprey for the Fleet Air Arm and the Hawker Audax for army co-operation. The Hawker Hartbees was a dedicated ground-attack version built for the South African Air Force.

Operators

The primary operator was the Royal Air Force, which deployed the Hart in the United Kingdom, Middle East, and India. Significant numbers were also exported or license-built for commonwealth and allied air forces. The Swedish Air Force operated the type as the B 4, with many built locally by ASJA and Centrala Flygverkstaden at Malmen. The South African Air Force used both standard Harts and the specialized Hartbees. Other operators included the Royal Egyptian Air Force, the Estonian Air Force, and the Southern Rhodesian government. The Yugoslav Royal Air Force also evaluated the aircraft.

Specifications (Hart)

* **Crew:** 2 (pilot and observer/gunner) * **Length:** 29 ft 4 in (8.94 m) * **Wingspan:** 37 ft 3 in (11.35 m) * **Height:** 10 ft 5 in (3.17 m) * **Empty weight:** 2,530 lb (1,148 kg) * **Gross weight:** 4,554 lb (2,066 kg) * **Powerplant:** 1 × Rolls-Royce Kestrel IB liquid-cooled V12 engine, 525 hp (391 kW) * **Maximum speed:** 184 mph (296 km/h, 160 kn) * **Range:** 470 mi (760 km, 410 nmi) * **Service ceiling:** 21,350 ft (6,500 m) * **Armament:** 1 × forward-firing .303 in (7.7 mm) Vickers machine gun; 1 × .303 in (7.7 mm) Lewis Gun in rear cockpit; up to 520 lb (236 kg) bombs

Category:British bomber aircraft 1920–1929 Category:Hawker aircraft Category:Biplane aircraft