The BAT F.K.23 Bantam was a British single-seat fighter

biplane A biplane is a fixed-wing aircraft with two main wings stacked one above the other. The first powered, controlled aeroplane to fly, the Wright Flyer, used a biplane wing arrangement, as did many aircraft in the early years of aviation. While ...

produced by British Aerial Transport Company Limited of

London London is the capital and largest city of England and the United Kingdom, with a population of just under 9 million. It stands on the River Thames in south-east England at the head of a estuary down to the North Sea, and has been a majo ...

during

World War I World War I (28 July 1914 11 November 1918), often abbreviated as WWI, was one of the deadliest global conflicts in history. Belligerents included much of Europe, the Russian Empire, the United States, and the Ottoman Empire, with fightin ...

Design and development

Frederick Koolhoven Frederick (Frits) Koolhoven (11 January 1886 – 1 July 1946) was an aircraft designer in Britain and his native Netherlands. Koolhoven was born in Bloemendaal, Netherlands. After training as an engineer in Liège and Antwerp, he worked from 19 ...

's first design for the British Aerial Transport Company (BAT) was the F.K.22 single-seat fighter. It was a two-bay biplane of wooden construction. It was planned to have a 120 hp (90 kW) A.B.C Mosquito

radial engine The radial engine is a reciprocating type internal combustion engine configuration in which the cylinders "radiate" outward from a central crankcase like the spokes of a wheel. It resembles a stylized star when viewed from the front, and is ca ...

but the failure of this engine led to the installation of the 170 hp (127 kW) A.B.C.Wasp I in the first and third aircraft. The second machine was fitted with a 100 hp (75 kW)

Gnome Monosoupape The ''Monosoupape'' ( French for single-valve), was a rotary engine design first introduced in 1913 by Gnome Engine Company (renamed Gnome et Rhône in 1915). It used a clever arrangement of internal transfer ports and a single pushrod-operated ...

rotary engine The rotary engine is an early type of internal combustion engine, usually designed with an odd number of cylinders per row in a radial configuration. The engine's crankshaft remained stationary in operation, while the entire crankcase and i ...

and was the first to fly at Martlesham Heath in January 1918. The original contract called for six development aircraft but three aircraft were built as the F.K.23 Bantam I, the second prototype then being renamed the Bantam II. The Bantam I was the same wooden structure but was slightly smaller. Two further prototypes of the larger design were also built followed by at least 9 development aircraft. One aircraft was delivered to the

Royal Aircraft Establishment The Royal Aircraft Establishment (RAE) was a British research establishment, known by several different names during its history, that eventually came under the aegis of the Ministry of Defence (United Kingdom), UK Ministry of Defence (MoD), bef ...

on 26 July 1918, one was delivered to the French at Villacoublay and a further aircraft to the

United States Army Air Corps The United States Army Air Corps (USAAC) was the aerial warfare service component of the United States Army between 1926 and 1941. After World War I, as early aviation became an increasingly important part of modern warfare, a philosophical r ...

Wright Field Wilbur Wright Field was a military installation and an airfield used as a World War I pilot, mechanic, and armorer training facility and, under different designations, conducted United States Army Air Corps and Air Forces flight testing. Loca ...

in 1922. The production Bantam had to be modified due to unsatisfactory

spin Spin or spinning most often refers to: * Spinning (textiles), the creation of yarn or thread by twisting fibers together, traditionally by hand spinning * Spin, the rotation of an object around a central axis * Spin (propaganda), an intentionally b ...

characteristics of the

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s. Continuous engine problems and downsizing of the

Royal Air Force The Royal Air Force (RAF) is the United Kingdom's air and space force. It was formed towards the end of the First World War on 1 April 1918, becoming the first independent air force in the world, by regrouping the Royal Flying Corps (RFC) and ...

were factors in no more orders for the Bantam. Koolhoven returned to

Netherlands ) , anthem = ( en, "William of Nassau") , image_map = , map_caption = , subdivision_type = Sovereign state , subdivision_name = Kingdom of the Netherlands , established_title = Before independence , established_date = Spanish Netherl ...

with one aircraft where it was re-engined with a 200 hp (149 kW)

Armstrong Siddeley Lynx The Armstrong Siddeley Lynx is a British seven-cylinder aero engine developed by Armstrong Siddeley. Testing began in 1920 and 6,000 had been produced by 1939. In Italy Alfa Romeo built a licensed version of this engine named the Alfa Romeo ...

radial engine. Several examples were operated as civil racing aircraft.

Variants

;F.K.22 Bantam I :Prototypes and evaluation version, 2 built. ;F.K.23 Bantam II :Production aircraft, 3 prototypes + 9 aircraft were built.

Operators

; *

French Air Force The French Air and Space Force (AAE) (french: Armée de l'air et de l'espace, ) is the air and space force of the French Armed Forces. It was the first military aviation force in history, formed in 1909 as the , a service arm of the French Army; ...

received 1 aircraft for evaluation. ; *

Koolhoven N.V. Koolhoven was an aircraft manufacturer based in Rotterdam, Netherlands. From its conception in 1926 to its destruction in the Blitzkrieg in May 1940, the company remained the second major Dutch aircraft manufacturer (after Fokker). Althoug ...

factory operated 1 aircraft. ; *

operated 1 aircraft. ; *

received 1 aircraft for evaluation.

Survivors

*One aircraft, registered K-123, originally on display at the

Aviodome The Nationaal Luchtvaart-Themapark Aviodrome (also known simply as Aviodrome) is a large aerospace museum in the Netherlands that has been located on Lelystad Airport since 2003. Previously the museum was located at Schiphol Airport.

. The airplane was acquiredB.A.T. F.K.23 Bantam moves to Rijksmuseum
The Rijksmuseum, the Dutch National museum for classic art and history in Amsterdam that is most of all known for

Rembrandt Rembrandt Harmenszoon van Rijn (, ; 15 July 1606 – 4 October 1669), usually simply known as Rembrandt, was a Dutch Golden Age painter, printmaker and draughtsman. An innovative and prolific master in three media, he is generally consid ...

The Night Watch ''Militia Company of District II under the Command of Captain Frans Banninck Cocq'', also known as ''The Shooting Company of Frans Banning Cocq and Willem van Ruytenburch'', but commonly referred to as ''The Night Watch'' ( nl, De Nachtwacht), i ...

, recently acquired the B.A.T. (Koolhoven) F.K.23 Bantam. It will be part of a future exhibition on the twentieth century. The B.A.T. F.K.23 Bantam was restored by members of the Koolhoven Aeroplanes Foundation. by the

Rijksmuseum The Rijksmuseum () is the national museum of the Netherlands dedicated to Dutch arts and history and is located in Amsterdam. The museum is located at the Museum Square in the borough of Amsterdam South, close to the Van Gogh Museum, the St ...

Amsterdam Amsterdam ( , , , lit. ''The Dam on the River Amstel'') is the Capital of the Netherlands, capital and Municipalities of the Netherlands, most populous city of the Netherlands, with The Hague being the seat of government. It has a population ...

. *The remains of a second FK 23 are used to build a flying example. It is a project from the "vroege vogels" from Lelystad in the Netherlands.

Specifications (F.K.23 Bantam)

Notes

References

* * * *

External links

BAT FK23 Bantam Walkaround photos at IdFlieg.com
* Contemporary technical description of F.K.23 Bantam with photographs and drawings. {{DEFAULTSORT:Bat Bantam 1910s British fighter aircraft Bantam Biplanes Single-engined tractor aircraft Koolhoven aircraft Aircraft first flown in 1918