De Havilland Oxford

infobox Aircraft
name = DH.11 Oxford
type = Bomber
manufacturer = Airco


caption =
designer = Geoffrey de Havilland
first flight = 1919
introduced =
introduction=
retired =
status = Prototype
primary user =
more users =
produced =
number built = One
unit cost =
developed from =
variants with their own articles = The Airco DH.11 was a British twin engined biplane bomber which was designed to replace the earlier Airco DH.10 bomber. It was designed to use the unsuccessful ABC Dragonfly engine and was abandoned after the first prototype was built.

Development

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. 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 wooden construction and three-bay wings. It had an aerodynamically clean, deep fuselage occupying the whole wing gap, giving good fields of fire for the gunners in the nose and mid-upper positions cite book |title=The British Bomber since 1914 |last=Lewis |first=Peter |edition= Third Edition |date= |year=1980 |publisher=Putnam |location= London |isbn= 0 370 30265 6] .

The first prototype flew in January 1919 Cite book |author=Mason, Francis K |title=The British Bomber since 1914 |publisher=Putnam Aeronautical Books |year=1994 |id= ISBN 0 85177 861 5, powered by two 320 hp 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.

Variants

* Oxford Mk I - Prototype - powered by two 320 hp ABC Dragonfly engines - one built.
* Oxford Mk II - Proposed version with two Siddeley Puma engines - not built.
* DH.12 - Proposed version with Dragonfly engines and modified gunner's position - not built.

pecifications (Oxford Mk I)

aircraft specifications
plane or copter?=plane
jet or prop?=prop

ref=Mason, The British Bomber since 1914
crew=Three
capacity=
length main= 45 ft 2¾ in
length alt= 13.79 m
span main= 60 ft 2 in
span alt= 18.34 m
height main= 13 ft 6 in
height alt= 4.12 m
area main= 719 ft²
area alt= 66.8 m²
airfoil=
empty weight main= 4,105 lb
empty weight alt= 1,866 kg
loaded weight main=
loaded weight alt=
useful load main=
useful load alt=
max takeoff weight main= 7,020 lb
max takeoff weight alt= 3,191 kg
more general=

engine (prop)= ABC Dragonfly
type of prop= 9 cylinder radial
number of props=2
power main= 320 hp
power alt= 239 kW
power original=
max speed main= 107 knots
max speed alt= 123 mph, 198 km/h
cruise speed main=
cruise speed alt=
never exceed speed main=
never exceed speed alt=
stall speed main=
stall speed alt=
range main=
range alt=
ceiling main= 14,500 ft
ceiling alt= 4,400 m
climb rate main=
climb rate alt=
loading main=
loading alt=
thrust/weight=
power/mass main= hp/lb
power/mass alt= kW/kg
more performance=*Climb to 10,000 ft: 13 min 45 sec
*Endurance: 3 hours

guns=One Lewis gun at Scarff rings at both nose and midships gunners cockpits

bombs=Four 230 lb bombs carried internally

avionics=

References

External links

* [http://www.britishaircraft.co.uk/aircraftpage.php?ID=854 British Aircraft Directory]

ee also

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