| MF.7 | |
|---|---|
 | |
| Role | Reconnaissance |
| Manufacturer | Farman Aviation Works |
| Designer | Maurice Farman |
| Retired | 1922 |
| Primary users | French Air Force Royal Flying Corps, Australian Flying Corps, Royal Danish Air Force |
The Maurice Farman MF.7 Longhorn is a French biplane developed before World War I which was used for reconnaissance by both the French and British air services in the early stages of the war before being relegated to service as a trainer.
The "Longhorn" is a three bay biplane with a forward elevator mounted on upcurved extensions of the landing skids and an empennage carried on four booms consisting of biplane horizontal stabilizers with an elevator attached to the trailing edge of the upper surface and twin rudders. The airframe was constructed using a combination of ash and silver spruce, and many of the members including the outer interplane struts and the outrigger booms carrying the tail surfaces are hollow. [1] It is powered by a Renault air-cooled V8 engine driving a pusher propeller mounted at the back of a fabric-covered nacelle. The propeller is mounted on the engine's camshaft, and therefore revolves at half the engine speed. [1] Its name was derived from the distinctive front-mounted elevator and elongated skids.
The design originated with Maurice Farman's second aircraft, which was built in 1910. This was 12.75 m (41.8 ft) long and had upper and lower wings both spanning 11 m (36 ft). The wings had rounded ends and the outer pair of interplane struts were fabric-covered to form voisin-style side curtains. The undercarriage was also of Voisin pattern, with a pair of mainwheels mounted on trailing arms below the skids. Lateral control was effected by ailerons mounted on the lower wings only. Pitch control was effected solely by a front-mounted elevator, the tail surfaces consisting of biplane fixed stabilizing surfaces and twin rudders. The gap between the wings was 1.5 m (5 ft). [2]
The side curtains were soon removed, and subsequent aircraft, including that flown by Maurice Tabateau to win the 1910 Coupe Michelin, had square-ended wings and modified tail surfaces, with an elevator added to the upper rear stabilizer.
The 1911 Maurice Farman aircraft flown to win the Michelin Puy de Dôme prize had an increased wingspan, the upper wing spanning 16 m (52 ft 6 in) and the lower 14.5 m (47 ft 7 in). Ailerons were mounted on both upper and lower wings. The undercarriage now had two pairs of wheels attached to the skids using elastic cords. [3]
The Maurice Farman is the subject of a detailed technical description in the issue of Flight dated 6 July 1912. This describes it as a new type but also notes that in essence, the design was at least two years old. The aircraft described differs from earlier aircraft principally in having a 2 m (6 ft 7 in) gap between the wings. [1]
Early versions of the design were used for instruction purposes at Maurice Farman's flying school at Buc.
On October 28, 1910 Maurice Tabateau won the Coupe Michelin prize by flying 464.72 km (288.76 mi) in 6 hr 1 min 35 s [4]
On 7 March 1911 Eugène Renaux flew an example to win the Michelin Prize offered for a passenger-carrying flight from Paris to the summit of the Puy de Dôme. [5]
A variant with an extra bay, increasing the span of the upper wing to 20 m (66 ft), was used by Géo Fourny to set an endurance record of 720 km (450 mi) in 11 hr 29 min 11 s on 2 September 1911. This was one of the two aircraft entered by Maurice Farman for the French military aircraft competition held in November 1911. [6] The second aircraft was of similar span, but was rigged so that it had staggered wings.
United Kingdom 
Australia 
Kingdom of Italy 
Spain 
Mexico 
France 
Belgium 
Norway 
Japan 
Denmark 
Makhnovshchina 
Russia 
Greece Data from Encyclopedia of Military Aircraft [8] [9]
General characteristics
Performance
Related development
Related lists
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