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The Armstrong Whitworth Sissit, also known as the Armstrong Whitworth F.K.1, was a prototype single-engined biplane fighter aircraft of the First World War. The first aircraft designed by Armstrong Whitworth, the Sissit was underpowered and only a single example was built.

Sissit
Role	Scout Type of aircraft
National origin	United Kingdom
Manufacturer	Armstrong Whitworth
Designer	Frederick Koolhoven
First flight	1914
Status	Prototype
Number built	1

Development and design

In 1913, the British War Office asked the engineering company Sir W G Armstrong Whitworth & Co Ltd to manufacture aeroplanes and aircraft engines for the Army, and in response to that request, Armstrong Whitworth set up an aircraft department, hiring the Dutch designer Frederick Koolhoven, formerly chief engineer of British Deperdussin as chief designer.[1]

Koolhoven's first design for Armstrong Whitworth was a small, single-seat, aircraft intended as a scout aircraft. A single-bay tractor biplane, the Sissit, or F.K.1[3] was fitted with balanced elevators and no fixed tailplane.[4]

Although designed for an 80 hp (60 kW) Gnome 7 Lambda rotary engine, only a 50 hp (37 kW) Gnome 7 Omega could be obtained. Fitted with this engine, it was first flown by Koolhoven in September 1914,[5] but proved to be underpowered, and was later modified with a fixed tailplane and enlarged ailerons.[6] As greatly superior single seat scout aircraft such as the Sopwith Tabloid and Bristol Scout were already available, no further development of the Sissit took place.[5]

Specifications

Data from British Aeroplanes 1914-18[7]

General characteristics

• Crew: 1
• Powerplant: 1 × Gnome 7 Omega 7-cylinder air-cooled rotary engine, 50 hp (37 kW)
• Propellers: 2-bladed fixed-pitch propeller

Performance

• Maximum speed: 75 mph (121 km/h, 65 kn)
• Stall speed: 30 mph (48 km/h, 26 kn)

Armament

• None

See also

Aircraft of comparable role, configuration, and era

• Bristol Scout
• Martinsyde S.1
• Sopwith Tabloid

Notes

References

На других языках

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- [en] Armstrong Whitworth Sissit

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[it] Armstrong Whitworth Sissit

L'Armstrong Whitworth Sissit, noto anche come Armstrong Whitworth F.K.1, fu un aereo scout, precursore dei più specializzati aerei da caccia, monoposto biplano realizzato dal dipartimento aeronautico dell'azienda britannica Armstrong Whitworth negli anni dieci del XX secolo e rimasto allo stadio di prototipo.

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