Entering operational service in 1914, the MF.11 was a regular participant of reconnaissance and light bombing sorties with numerous squadrons during her tenure. At one point, some 37 French escadrilles (squadrons) were formed with the MF.11 as the showcase weapon where she undertook bombing duties in day and night as needed (the MF.11 was capable of fielding a payload of 18 x 16lb bombs). In practice, her crews recounted her as a stable mount displaying solid flying qualities even in choppy skies. The Royal Navy operated at least 80 examples and several were stationed at Dardanelles and Mesopotamia. MF.11s in Belgium service were used to bomb German Zeppelin air bases and U-Boat submarine pens. Her first bombing mission was recorded on December 21st, 1914 when a British MF.11 attacked German artillery positions at Ostend, Belgium. One MF.11 crew was later credited with the downing of an airborne German Zeppelin by machine gun fire. The MF.11 continued frontline operational service up until 1915 before being relegated to second-line duties and ultimate retirement.
License production of the MF.11 outside of France was handled by companies in the United Kingdom, Russia and Italy. While only subtle changes existed between these types, such large-scale production ensured that the MF.11 would entertain a lengthy reach within the inventories of non-French operators.
The British took to designating the MF.11 as the "S.11" but this proved a lesser known identifier. She flew with the Royal Flying Corps in No.2, No.3, No.4, No.9, No.14, No.16, No.19, No.23, No.24, No.25, No.29, No.30 and No.65 squadrons as well as with flying elements of the Royal Naval Air Service. By default, British Commonwealth Australia further fielded the type within their Australian Flying Corps as part of squadrons No.5, the Mesopotamian Half Flight (the first Australian Flying Corps to see operational service) and the Central Flying School AFC, the latter based out of Point Cook, Victoria. Australia purchased their initial systems in 1916 to be used for training of pilots and crew and utilized them as such until better alternatives became available in 1919.
Across Europe and beyond French usage there existed squadrons in Belgium, Italy, Greece, Norway, Portugal, Romania, Serbia, Spain, Switzerland and the Ukraine service. Far to the East, the MF.11 was also operated by the Russian air service for a time. In the post-war years, at least two MF.11s were purchased by the Kingdom of Saudi Arabia from Italy sometime in 1921.
Italy itself produced additional MF.11 variants under license and attempted to better the design by implementation of different engine types of varying horsepower. This included the SAI 5 powered by a Fiat A.10 series engine of 100 horsepower and the Farman Columbo (MF.C) powered by a Colombo D.110 series engine of 110 horsepower. The latter also featured a revised, oval-shaped nacelle. Italian producers of the MF.11 were Savoia, Fiat, Macchi, Zari and Vickers Terni and many of the Italian-born MF.11s were appropriately armed with Italian Fiat-brand machine guns.
The Farman MF.13 (also known as the MF.130hp) was another side development of the MF.11, this featuring a 130 horsepower engine - hence its designation. The MF.14 (Model 1914) designation was collectively assigned to MF.11 and improved MF.11bis designs with their 100 horsepower engines.
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