Morane-Saulnier AI

AI (MoS.27, MoS.29 & MoS.30)
Role	fighter/trainer
National origin	France
Manufacturer	Morane-Saulnier
First flight	August 1917
Introduction	February 1918
Primary user	French Air Force
Number built	1210
Developed from	Morane-Saulnier AC

The Morane-Saulnier AI (also MoS.27, MoS.29 and MoS.30) is a French parasol-wing fighter aircraft that was produced by Morane-Saulnier during World War I.^{[note 1]}

Development and design

The AI evolved via the AC from the Morane-Saulnier Type N, but with a parasol wing. It had a rigidly braced wing with ailerons replacing the N's wing warping. It was intended to replace the Nieuport 17 and SPAD VII in French service, in competition against the SPAD XIII and Nieuport 28. It was ordered as a back-up for the SPAD XIII, in case the ongoing problems with its Hispano-Suiza continued to be unresolved.

Its Gnome Monosoupape 9N 120 kW (160 hp) rotary engine was mounted in the nose, in a tight fitting circular open-front cowling. The strut braced constant chord two-spar parasol wing was slightly swept back, and fitted with horn-balanced ailerons. The spars and ribs of the circular section teardrop-shaped fuselage were wood, wire-braced and covered in fabric, and faired out with wood stringers.^[2] Unlike most previous Morane-Saulnier designs, the AI's fuselage did not end in a horizontal knife edge, but rather came to a point which extended to the rear of the rudder and elevators.

Production aircraft were given service designations based on whether they had 1 Vickers machine gun (designated MoS 27), 2 Vickers guns (designated MoS 29) or none (designated MoS.30).^[1]^[3]

Operational history

The AI was briefly operated by a number of escadrilles from February 1918, but by mid-May 1918, most had been withdrawn from operations, and replaced by SPAD XIIIs due to structural problems.^[2] After that problem had been resolved, the aircraft were returned to service, but as advanced trainers, with new purpose-built examples being designated MoS 30 E.1.^[3] Many were used post-war after having been sold off as surplus, as aerobatic aircraft, including one which was flown by Charles Nungesser for a tour across the US.

Fifty-one MoS 30 E.1s were purchased by the American Expeditionary Force as pursuit trainers.^[3]

Variants

MoS.23 C.1/AC: Rigidly-braced shoulder-wing monoplane precursor.
MoS 27 C.1: Fighter variant with one 7.7 mm (0.303 in) Vickers machine gun and powered by a 120 kW (160 hp) Gnome Monosoupape 9N or NI rotary engine.
MoS 28 C.1/AF/AFH: Biplane derivative with a 120 kW (160 hp) Gnome Monosoupape 9N rotary engine. The AFH sub-variant was fitted with floats and intended for shipboard use.
MoS 29 C.1: Fighter variant with two 7.7 mm (0.303 in) Vickers machine guns and powered by a 120 kW (160 hp) Gnome Monosoupape 9N or NI rotary engine.
MoS 30 E.1: Unarmed single seat advanced trainer with either a 90 kW (120 hp) le Rhone 9Jb or a 100 kW (130 hp) le Rhone 9Jby rotary engine.
MoS 30bis E.1: Variant of the MoS 30 with a de-rated 67 kW (90 hp) le Rhone 9Jby.

In addition one undesignated example was built with a wood monocoque fuselage, and fitted with a 130 kW (170 hp) Le Rhone 9R rotary and two 7.7 mm (0.303 in) Vickers machine guns.

Post-war, examples in civilian use were re-engined with the 100 kW (130 hp) Clerget 9Ba rotary engine in a shorter cowling.

Operators

In addition to military operators, the Morane-Saulnier AI was popular with French aerobatic pilots and a number carried civil registrations.

Belgium

Belgian Air Force

Czechoslovakia

Czechoslovakian Air Force - operated a single MoS.30.

France

French Air Force

Japan

Imperial Japanese Army Air Service - Evaluated a single MoS.30 in 1922.

Soviet Union

Soviet Air Force - Four aircraft, used for tests and trials.

Switzerland

Swiss Air Force operated at least one aircraft.

United States

American Expeditionary Force - operated 51 MoS.30 trainers.

Survivors

Three AIs are flown from La Ferté-Alais.^[1]

The Fantasy of Flight collection in Polk City, Florida has an AI tested by the United States Army Air Service in 1918 at McCook Field in Ohio until being sold off for private use. It subsequently joined the Tallmantz Collection which was then acquired by Fantasy of Flight in 1985 and restored in the late 1980s.^[4]

Another AI, formerly flown by Charles Nungesser is at the Old Rhinebeck Aerodrome, and was flown in the weekend airshows there.^[5]

Specifications (MoS 27 C.1, 150 hp Monosoupape)

Data from War Planes of the First World War: Volume Five Fighters^[6]

General characteristics

Crew: 1
Length: 5.65 m (18 ft 6 in)
Wingspan: 8.51 m (27 ft 11 in)
Height: 2.40 m (7 ft 10 in)
Wing area: 13.39 m² (144.1 sq ft)
Empty weight: 421 kg (928 lb)
Gross weight: 649 kg (1,431 lb)
Powerplant: 1 × Gnome Monosoupape 9N , 112 kW (150 hp)

Performance

Maximum speed: 225 km/h (140 mph, 121 kn)
Endurance: 1 hours 45 minutes
Service ceiling: 7,000 m (23,000 ft) ^[7]
Time to altitude: 2 minutes to 1,000 m (3,300 ft)

Armament

Guns: 1 x 7.7 mm (0.303 in) Vickers machine gun forward of cockpit, later MoS.29 had two Vickers, and the MoS.30 trainer was unarmed.

Aircraft of comparable role, configuration, and era

References

Notes

^ Morane-Saulnier used letters for designations, while official government designations used numbers. Contemporary use was generally in Roman numerals, as MoS.XXVII, MoS.XXIX and MoS.XXX, but Arabic numerals were also used. Both MS and MoS were used interchangeably as an abbreviation of Morane-Saulnier.

Citations

^ ^a ^b ^c Donald 1997, p. 659.
^ ^a ^b Holmes, 2005. p 36.
^ ^a ^b ^c Lamberton 1960, p. 84.
^ "Morane A1." Fantasy of Flight. Retrieved: 25 March 2012.
^ "Morane-Saulnier A-I". 24 February 2021.
^ Bruce 1973, pp. 122–123.
^ Angelucci 1983, p. 45.

Bibliography

Angelucci, Enzo. The Rand McNally Encyclopedia of Military Aircraft, 1914-1980. San Diego, California: The Military Press, 1983. ISBN 0-517-41021-4.
Bruce, J.M. War Planes of the First World War: Volume Five Fighters. London: Macdonald, 1972. ISBN 0-356-03779-7.
Bruce, J.M. (1989). Morane-Saulnier Type AI. Windsock Mini Datafile 5. Herts, UK: Albatros Publications. ISBN 9780948414831.
Davilla, Dr. James J.; Soltan, Arthur (1997). French Aircraft of the First World War. Mountain View, CA: Flying Machines Press. ISBN 978-1891268090.
Donald, David, ed. The Encyclopedia of World Aircraft. Ottawa, Canada: Prospero Books, 1997. p. 659. ISBN 1-85605-375-X.
Holmes, Tony. Jane's Vintage Aircraft Recognition Guide. London: Harper Collins, 2005. p. 36. ISBN 0-00-719292-4.
Kotelnikov, V.; Kulikov, V. & Cony, C. (December 2001). "Les avions français en URSS, 1921–1941" [French Aircraft in the USSR, 1921–1941]. Avions: Toute l'Aéronautique et son histoire (in French) (105): 50–56. ISSN 1243-8650.
Lamberton, W.M. Fighter Aircraft of the 1914-1918 War. Herts, UK: Harleyford Publications Ltd., 1960, pp. 84–85.

External links

Cole Palen flying Old Rhinebeck's Morane AI in early August 1990

[designations-2] Morane-Saulnier used letters for designations, while official government designations used numbers. Contemporary use was generally in Roman numerals, as MoS.XXVII, MoS.XXIX and MoS.XXX, but Arabic numerals were also used. Both MS and MoS were used interchangeably as an abbreviation of Morane-Saulnier.

[Donald-1] Donald 1997, p. 659.

[Holmes-3] Holmes, 2005. p 36.

[Lamberton-4] Lamberton 1960, p. 84.

[5] "Morane A1." Fantasy of Flight. Retrieved: 25 March 2012.

[6] "Morane-Saulnier A-I". 24 February 2021.

[Bruce_v5p122-3-7] Bruce 1973, pp. 122–123.

[8] Angelucci 1983, p. 45.

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v t e Morane-Saulnier aircraft
Designation letters	A B C F G GA GB H I J K L LA LH M N Nm O P Q S T TRK U V WR X Y AC AE AF AFH AI AN/ANB/ANR/ANL/ANS AR AS AT AU AV BB BH
Numerical sequence	MoS.1 MoS.2 MoS.3 MoS.4 MoS.5 MoS.6 MoS.7 MoS.8 MoS.9 MoS.10 MoS.11 MoS.12 MoS.13 MoS.14 MoS.15 MoS.16 MoS.17 MoS.18 MoS.19 MoS.20 MoS.21 MoS.22 MoS.23 MoS.24 MoS.25 MoS.26 MoS.27 MoS.28 MoS.29 MoS.30 MoS.31 MoS.32 MoS.33 MoS.34 MoS.35 MoS.36 MoS.37 MoS.38 MoS.39 MoS.40 MoS.41 MoS.42 MoS.43 MoS.44 MoS.45 MoS.46 MoS.47 MoS.48 MoS.49 MoS.50 MoS.51 MoS.52 MoS.53 MoS.56 MoS.60 MoS.120 MoS.121 MoS.129 MoS.130 MoS.131 MoS.132 MoS.133 MoS.134 MoS.136 MoS.137 MoS.138 MoS.139 MoS.140 MoS.141 MoS.147 MoS.148 MoS.149 MS.152 MS.160 MS.180 MS.181 MS.185 MS.200 MS.221 MS.222 MS.223 MS.224 MS.225 MS.226 MS.227 MS.229 MS.230 MS.250 MS.251 MS.260 MS.275 MS.278 MS.300 MS.301 MS.302 MS.315 MS.316 MS.317 MS.325 MS.340 MS.341 MS.342 MS.343 MS.345 MS.350 MS.405 MS.406 MS.408 MS.410 MS.411 MS.430 MS.433 MS.435 MS.450 MS.470 MS.472 MS.474 MS.470 MS.475 MS.476 MS.477 MS.479 MS.500 MS.501 MS.502 MS.504 MS.505 MS.506 MS.560 MS.570 MS.603 MS.630 MS.631 MS.700 MS.701 MS.703 MS.704 MS.730 MS.731 MS.732 MS.733 MS.755 MS.760 MS.785 MS.860 MS.880 MS.1001 MS.1500
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