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Morane-Saulnier MoS-121 Aircraft Information

Morane-Saulnier MoS-121

MoS 121

National origin: France
Manufacturer: Morane-Saulnier
First flight: 1927
Number built: 1

The Morane-Saulnier MoS-121, also known as the Morane-Saulnier MS 121 was a French fighter prototype of the 1920s. It was Morane-Saulnier's first fighter design after World War I.


As a direct result of concern over the escalating cost of fighter manufacture, the French government and air force instituted a program for chasseurs légers or 'light fighters' in 1926. This was unofficially known as the 'Jockey' program, and it envisaged the use of moderate guns, minimal equipment and small amounts of ammunition. Emphasis was placed on climb rate, endurance and a ceiling (high for the time) of 8000 metres. To meet this requirement, Morane-Saulnier designed the MoS-121, renamed the MS 121 in 1927. The prototype appeared in that year and was a single-seat parasol monoplane of mixed construction.

Operational history

After flying for the first time in mid-1927, it proved underpowered and incapable of climbing easily and was discarded in favour of the Morane-Saulnier MS 221.


General characteristics

Crew: 1
Length: 6.72 m (22 ft 1 in)
Wingspan: 9.80 m (32 ft 2 in)
Height: 2.98 m (9 ft 9 in)
Wing area: 16.00 m² (172.22 ft²)
Empty weight: 915 kg (2017 lb)
Gross weight: 1230 kg (2712 lb)
Powerplant: 1 x— Hispano-Suiza 12Jb 12-cylinder water-cooled engine, 347 kW (465 hp)


Maximum speed: 160 km/h (257 mph)


2 x forward-firing 7.7 mm Vickers gun

Green, William; Gordon Swanborough. The Complete Book of Fighters. Godalming, UK: Salamander Books. pp. 415.

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Source: WikiPedia

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