Marchetti MVT

Vickers-Terni

Industry	Aerospace
Headquarters	La Spezia , Italy
Products	Aircraft manufacturing

The Marchetti MVT, which was later designated as the SIAI S.50, represented an Italian fighter aircraft developed during 1919 and into the early 1920s.

Design and development

The MVT, an acronym for "Marchetti-Vickers-Terni," was conceived by Alessandro Marchetti (1884–1966) as a single-seat, all-metal biplane featuring a fuselage positioned between its upper and lower wings. Its rear fuselage section was uniquely flattened to function as an aerodynamic surface. The aircraft's semi-elliptical wings were notably thin and utilized wing warping for lateral maneuverability, while it incorporated fully movable tail surfaces. Propulsion came from an SPA 6a water-cooled engine delivering 164 kilowatts (220 horsepower) to a two-blade propeller. Armament consisted of two fixed, forward-firing 7.7 millimeter (0.303-inch) Vickers machine guns synchronized to fire through the propeller arc.

Manufactured by Vickers-Terni at their facility in La Spezia, the MVT took to the skies for its maiden flight in 1919. On December 9 of that year, it achieved an unofficial top speed of 250 kilometers per hour (155 miles per hour). However, this speed was not officially recognized as a world record due to the absence of observers from the Fédération Aéronautique Internationale, the global authority overseeing aeronautical achievements.

In 1920, Marchetti revised the MVT design, extending the wingspan and adopting splayed interplane struts alongside a redesigned Cabane strut framework. The powerplant was upgraded to an SPA 62a engine rated at 234 kilowatts (285 horsepower). During trials conducted at Guidonia Montecelio, this updated version reached a maximum velocity of 275 kilometers per hour (171 miles per hour).

Upon joining the SIAI company as chief designer in 1922, Marchetti's MVT was rebranded as the SIAI S.50. Although it did not fulfill the Regia Aeronautica (Italian Royal Air Force) requirements for the 1923 single-seat fighter competition—which mandated use of the 224-kilowatt (300-horsepower) Hispano-Suiza HS 42 eight-cylinder water-cooled engine—SIAI still entered the aircraft into the contest. The S.50 received sufficient interest for the Regia Aeronautica to procure three units for testing and consider placing an order for twelve more; however, these additional aircraft were never built or delivered.

The operational experience gained from the S.50 during the 1923 competition inspired Alessandro Marchetti to develop a successor fighter model, resulting in the creation of the SIAI S.52.

Variants

Among the three S.50 aircraft operated by the Regia Aeronautica, one was adapted to feature twin floats, transforming it into a floatplane.

Operators

Template:Country data Kingdom of Italy

• Corpo Aeronautico Militare
• Regia Aeronautica

Specifications (MVT with SPA 6a engine)

Source: Template:Aircraft specs Additional details:

• Climb to 1,000 m (3,281 ft): 2 minutes
• Climb to 5,000 m (16,405 ft): 11 minutes

References

• Green, William, and Gordon Swanborough. The Complete Book of Fighters: An Illustrated Encyclopedia of Every Fighter Aircraft Built and Flown. New York: SMITHMARK Publishers, 1994. ISBN 0-8317-3939-8.