Engineering:Savoia-Marchetti S.74

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S.74
Savoia-Marchetti S.74 (I-URBE) a Walter Pegas (4x).jpg
Role Airliner then military transport aircraft
National origin Italy
Manufacturer Savoia-Marchetti
Designer Alessandro Marchetti
First flight 16 Nov 1934
Introduction 1935
Retired 1943
Primary users LATI
Regia Aeronautica
Number built 3
Developed from Savoia-Marchetti S.72

The Savoia-Marchetti S.74 was a four-engine airliner developed by Savoia-Marchetti for Ala Littoria.

Design and development

The prototype first flew on 16 November 1934. Only three were ever built.[1]

Operational history

The aircraft were used in passenger service. On 22 December 1937, one broke the speed record over 1,000 kilometres (620 mi), at 322.089 km/h (200.137 mph).[2] When Italy entered World War II in 1940, they were put into service as military transport aircraft for the Regia Aeronautica. None of the three survived the war.

Operators

Civil operators

 Kingdom of Italy
  • LATI

Military operators

 Kingdom of Italy
  • Regia Aeronautica

Specifications (S.74)

Paris-Le Bourget Airport in 1935. I-URBE (in the foreground) is an S.74; the other aircraft is a Douglas DC-2 airliner operated by the Spain airline LAPE (Lineas Aéreas Postales Españolas).

Data from World Encyclopedia of Civil Aircraft,[3] Italian Civil and Military Aircraft 1930–1945[1]

General characteristics

  • Crew: 4
  • Capacity: 24 passengers + 363 kg (800 lb) baggage + 726 kg (1,600 lb) freight
  • Length: 19.495 m (63 ft 11 1⁄2 in)
  • Wingspan: 30.00 m (98 ft 5 in)
  • Height: 5.499 m (18 ft 0 1⁄2 in)
  • Wing area: 119.96 m2 (1,291.2 sq ft)
  • Empty weight: 7,784 kg (17,160 lb)
  • Gross weight: 14,000 kg (30,865 lb)
  • Powerplant: 4 × Piaggio Stella P.X R.C. 9-cylinder air-cooled radial piston engines, 520 kW (700 hp) each for take-off
  • Propellers: 3-bladed variable-pitch metal propellers

Performance

  • Maximum speed: 330 km/h (210 mph, 180 kn)
285 km/h (177 mph; 154 kn) on three engines
  • Cruise speed: 300 km/h (190 mph, 160 kn)
  • Range: 1,000 km (620 mi, 540 nmi)
  • Service ceiling: 7,000 m (22,960 ft)
  • Time to altitude: 3,000 m (9,840 ft) in 8 minutes 55 seconds
5,000 m (16,400 ft) in 19 minutes 43 seconds

See also

Aircraft of comparable role, configuration and era

References

  1. ↑ 1.0 1.1 Thompson, Jonathon W. (1963). Italian Civil and Military Aircraft 1930–1945. USA: Aero Publishers Inc.. pp. 260–261. ISBN 0-8168-6500-0. 
  2. ↑ Faurote, Fay Leone (1939). The Aircraft Year Book for 1939. New York City: Manufacturers Aircraft Association. p. 473. 
  3. ↑ Angelucci, Enzo (1982). World Encyclopedia of Civil Aircraft. New York: Crown Publishers, Inc. ISBN 0-517-54724-4. https://archive.org/details/worldencyclopedi00ange. 



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