The Airco DH.11 Oxford (later de Havilland) was a British twin-engined biplane bomber which was designed to replace the earlier Airco DH.10 Amiens. It was designed to use the unsuccessful ABCDragonfly engine and was abandoned after the first prototype was built.
The DH.11 Oxford was designed by Geoffrey de Havilland for the Aircraft Manufacturing Company as a twin-engined day bomber to replace the Airco DH.10 Amiens. It was designed (as required by the Specification) to use the ABCDragonflyradial engine which promised to give excellent performance and had been ordered in large numbers to be the powerplant for most of the new types on order for the Royal Air Force. The DH.11 was a twin-engined biplane, with all-wood construction and three-bay wings. It had an aerodynamically clean, deep fuselage occupying the whole wing gap, giving a good field of fire for the gunners in the nose and mid-upper positions.[1]
The first prototype flew in January 1919,[2] powered by two 320 hp (239 kW) Dragonfly engines. The prototype encountered handling problems, and was handicapped by the Dragonfly engines, which were extremely unreliable, being prone to overheating and excessive vibration, while not delivering the expected power. Two further prototypes were cancelled in 1919, with no aircraft in the end being purchased to replace the DH.10.[2]
Variantsedit
Oxford Mk I – Prototype – powered by two 320 hp (240 kW) ABC Dragonfly engines – one built.[2]
Oxford Mk II – Proposed version with two 300 hp (220 kW) Siddeley Puma engines – not built.[2]
DH.12 – Proposed version with Dragonfly engines and modified gunner's position – not built.[3]
Lewis, Peter (1980). The British Bomber since 1914 (Third ed.). London: Putnam. ISBN0-370-30265-6.
Mason, Francis K. (1994). The British Bomber since 1914. Putnam Aeronautical Books. ISBN0-85177-861-5.
May 11, 2024
airco, oxford, later, havilland, british, twin, engined, biplane, bomber, which, designed, replace, earlier, airco, amiens, designed, unsuccessful, dragonfly, engine, abandoned, after, first, prototype, built, oxford, role, bomber, manufacturer, airco, designe. The Airco DH 11 Oxford later de Havilland was a British twin engined biplane bomber which was designed to replace the earlier Airco DH 10 Amiens It was designed to use the unsuccessful ABC Dragonfly engine and was abandoned after the first prototype was built DH 11 Oxford Role Bomber Manufacturer Airco Designer Geoffrey de Havilland First flight January 1919 Status Abandoned Number built One Developed from Airco DH 10 Amiens Contents 1 Development 2 Variants 3 Specifications Oxford Mk I 4 See also 5 References 5 1 Citations 5 2 BibliographyDevelopment editThe DH 11 Oxford was designed by Geoffrey de Havilland for the Aircraft Manufacturing Company as a twin engined day bomber to replace the Airco DH 10 Amiens It was designed as required by the Specification to use the ABC Dragonfly radial engine which promised to give excellent performance and had been ordered in large numbers to be the powerplant for most of the new types on order for the Royal Air Force The DH 11 was a twin engined biplane with all wood construction and three bay wings It had an aerodynamically clean deep fuselage occupying the whole wing gap giving a good field of fire for the gunners in the nose and mid upper positions 1 The first prototype flew in January 1919 2 powered by two 320 hp 239 kW Dragonfly engines The prototype encountered handling problems and was handicapped by the Dragonfly engines which were extremely unreliable being prone to overheating and excessive vibration while not delivering the expected power Two further prototypes were cancelled in 1919 with no aircraft in the end being purchased to replace the DH 10 2 Variants editOxford Mk I Prototype powered by two 320 hp 240 kW ABC Dragonfly engines one built 2 Oxford Mk II Proposed version with two 300 hp 220 kW Siddeley Puma engines not built 2 DH 12 Proposed version with Dragonfly engines and modified gunner s position not built 3 Specifications Oxford Mk I editData from The British Bomber since 1914 2 General characteristicsCrew 3 Length 45 ft 2 3 4 in 13 786 m Wingspan 60 ft 2 in 18 34 m Height 13 ft 6 in 4 11 m Wing area 719 sq ft 66 8 m2 Empty weight 4 105 lb 1 862 kg Max takeoff weight 7 027 lb 3 187 kg Powerplant 2 ABC Dragonfly air cooled 9 cylinder radial engines 320 hp 240 kW each Propellers 2 bladed wood fixed pitch propellers Performance Maximum speed 123 mph 198 km h 107 kn at sea level 116 mph 187 km h at 10 000 ft 3 000 m Endurance 3 hr Service ceiling 14 500 ft 4 400 m Time to altitude 13 min 45 s to 10 000 ft 3 000 m Armament Guns 1 303 in 7 7 mm Lewis gun at Scarff rings at both nose and midships gunners cockpits Bombs 4 230 lb 100 kg bombs internallySee also edit1919 in aviation Related development Airco DH 10 Amiens Aircraft of comparable role configuration and era Avro 533 Manchester Nieuport London Vickers Vimy Related lists List of bomber aircraft List of aircraft of the Royal Air ForceReferences edit nbsp Wikimedia Commons has media related to Airco DH 11 Oxford Citations edit Lewis 1980 p 105 a b c d e Mason 1994 p 130 Lewis 1980 p 106 Bibliography edit Lewis Peter 1980 The British Bomber since 1914 Third ed London Putnam ISBN 0 370 30265 6 Mason Francis K 1994 The British Bomber since 1914 Putnam Aeronautical Books ISBN 0 85177 861 5 Retrieved from https en wikipedia org w index php title Airco DH 11 Oxford amp oldid 1019233561, wikipedia, wiki, book, books, library,
