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{|{{Infobox Aircraft Begin
{|{{Infobox Aircraft Begin
| name=MoS 121
| name=MoS 121
| image=MoS 121 left front photo NACA Aircraft Circular No.75.jpg
| image=
| caption=
| caption=
}}{{Infobox Aircraft Type
}}{{Infobox Aircraft Type
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| manufacturer=[[Morane-Saulnier]]
| manufacturer=[[Morane-Saulnier]]
| designer=
| designer=
| first flight={{avyear|1927}}
| first flight=1927
| introduced=
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| retired=
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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]].
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]].


==Development==
==Development==
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 {{avyear|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.
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, as a single-seat parasol monoplane of mixed construction.


==Operational history==
==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]].
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]].
<!-- ==Units using this aircraft/Operators (choose)== -->


==Specifications==
==Specifications (MoS-121)==
[[File:Morane-Saulnier_MS.121_3-view_L'Aéronautique_June,1928.png|thumb|Morane-Saulnier MS.121 3-view drawing from L'Aéronautique June,1928]]

{{Aircraft specs
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|ref=Jane's all the World's Aircraft 1928,<ref name=JAWA1928>{{cite book |title=Jane's all the World's Aircraft 1928 |editor1-last=Grey |editor1-first=C.G. |year=1928 |publisher=Sampson Low, Marston & company, ltd |location=London |page=113c}}</ref> The Complete Book of Fighters<ref name=CBoF>{{cite book |last=Green |first=William |title=The Complete Book of Fighters |year=1994 |publisher=Salamander |location=London |isbn=1-85833-777-1 |author2=Swanborough, Gordon |page=416}}</ref>

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==References==
==References==
{{commons category|Morane-Saulnier}}
{{reflist}}
{{reflist}}

* {{cite book |last=Green |first=William |author2=Gordon Swanborough |title=The Complete Book of Fighters |publisher=Salamander Books|location=Godalming, UK|pages=415}}
==Further reading==
<!-- ==External links== -->
{{commons category|Morane-Saulnier MS.121}}
*{{cite book |last1=Lacaze |first1=Henri |last2=Lherbert |first2=Claude |title=Morane Saulnier: ses avions, ses projets |date=2013 |publisher=Lela Presse |location=Outreau, France |isbn=978-2-914017-70-1 |language=fr|name-list-style=amp|trans-title=Morane Saulnier: Their Aircraft and Projects}}


{{Morane-Saulnier aircraft}}
{{Morane-Saulnier aircraft}}


[[Category:Morane-Saulnier aircraft|MS.121]]
[[Category:Morane-Saulnier aircraft|MS.121]]
[[Category:French fighter aircraft 1920–1929]]
[[Category:Single-engined tractor aircraft]]
[[Category:1920s French fighter aircraft]]

Latest revision as of 18:15, 4 July 2023

MoS 121
Role Fighter
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.

Development[edit]

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, as a single-seat parasol monoplane of mixed construction.

Operational history[edit]

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.

Specifications (MoS-121)[edit]

Morane-Saulnier MS.121 3-view drawing from L'Aéronautique June,1928

Data from Jane's all the World's Aircraft 1928,[1] The Complete Book of Fighters[2]

General characteristics

  • Crew: 1
  • Length: 6.717 m (22 ft 0 in)
  • Wingspan: 9.8 m (32 ft 2 in)
  • Height: 2.885 m (9 ft 6 in)
  • Wing area: 16 m2 (170 sq ft)
  • Empty weight: 990 kg (2,183 lb)
  • Gross weight: 1,250 kg (2,756 lb)
  • Powerplant: 1 × Hispano-Suiza 12Jb , 347 kW (465 hp)
  • Propellers: 2-bladed wooden fixed pitch propeller

Performance

  • Maximum speed: 253 km/h (157 mph, 137 kn) at 1,000 m (3,300 ft)
250 km/h (160 mph; 130 kn) at 2,500 m (8,200 ft)
246 km/h (153 mph; 133 kn) at 3,500 m (11,500 ft)
  • Endurance: 1.5 hours at full throttle
  • Service ceiling: 8,700 m (28,500 ft)
  • Time to altitude: 1,500 m (4,900 ft) in 3 minutes 44 seconds
3,500 m (11,500 ft) in 9 minutes 19 seconds
4,500 m (14,800 ft) in 13 minutes 11 seconds
6,500 m (21,300 ft) in 25 minutes 25 seconds
7,500 m (24,600 ft) in 36 minutes 5 seconds
  • Wing loading: 78 kg/m2 (16 lb/sq ft)
  • Power/mass: 0.2694 kW/kg (0.1639 hp/lb)

Armament

References[edit]

  1. ^ Grey, C.G., ed. (1928). Jane's all the World's Aircraft 1928. London: Sampson Low, Marston & company, ltd. p. 113c.
  2. ^ Green, William; Swanborough, Gordon (1994). The Complete Book of Fighters. London: Salamander. p. 416. ISBN 1-85833-777-1.

Further reading[edit]

Wikimedia Commons has media related to Morane-Saulnier MS.121.
  • Lacaze, Henri & Lherbert, Claude (2013). Morane Saulnier: ses avions, ses projets [Morane Saulnier: Their Aircraft and Projects] (in French). Outreau, France: Lela Presse. ISBN 978-2-914017-70-1.
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