SM.79

SM.79
Name	Savoia-Marchetti SM.79
Caption	Italian trimotor medium bomber and torpedo bomber, 1930s
Type	Medium bomber / Torpedo bomber
Manufacturer	Savoia-Marchetti
First flight	1934
Introduced	1936
Primary user	Regia Aeronautica
Produced	1934–1943
Number built	~1,300

SM.79

The Savoia-Marchetti SM.79 was an Italian three-engine fast medium bomber and torpedo bomber developed in the 1930s by Savoia-Marchetti for the Regia Aeronautica. It gained fame for actions during the Spanish Civil War and the Mediterranean campaigns of World War II, operating alongside units and forces such as the Regia Marina, the Royal Air Force, the Royal Navy, and the Luftwaffe. Notable for its distinctive humpback fuselage and speed that rivaled early fighters, it served in theaters that included the Battle of Greece, the Siege of Malta, the North African Campaign, and operations in the Soviet Union.

Design and development

The SM.79 originated from proposals within Savoia-Marchetti led by Chief Designer Alessandro Marchetti and drew on contemporary developments from firms such as Piaggio, Fiat, and Caproni. Early trials referenced performance expectations set by aircraft like the Junkers Ju 86 and Handley Page Heyford, while engine choices considered powerplants from Isotta Fraschini, Alfa Romeo, and license-built Pratt & Whitney types. The airframe combined a wooden wing structure with a fuselage featuring a distinctive dorsal spine, anticipating aerodynamic lessons from the Aerial Age and studies appearing at events such as the Paris Air Show. Prototype flights in 1934 demonstrated speed and handling that influenced procurement decisions during the Aviation Act era reforms within the Regia Aeronautica.

Structural solutions incorporated lessons from contemporaries like the Heinkel He 111 and Breguet 693, with a three-engine configuration intended to balance power and range for missions over the Mediterranean Sea and across the Central Mediterranean. Work by engineers who previously contributed to projects for SIAI-Marchetti and collaborations with industrial partners such as Vickers-Armstrongs informed production techniques. Trials emphasized torpedo carriage compatibility to meet requirements from the Regia Marina and naval planners influenced by doctrines similar to those debated at the London Naval Conference.

Operational history

The type first saw combat with units transferred to support the Nationalist faction during the Spanish Civil War alongside squadrons that included volunteer pilots linked with groups like the Condor Legion and observers from the Aviación Nacional. In World War II it was deployed widely: sorties targeted convoys during the Battle of the Mediterranean, interdicted shipping around Malta during the Siege of Malta, and struck targets in the Eastern Front when detached to support Axis efforts with coordination near units of the Luftflotte 2. Encounters with fighters from formations such as the Royal Air Force's No. 261 Squadron RAF and later night engagements involving crews from HMS Illustrious highlighted both strengths and vulnerabilities.

Notable missions included torpedo attacks against Allied convoys during operations linked to the Battle of Cape Matapan period and interdiction runs supporting the North African Campaign that affected supply lines to forces under commanders like Erwin Rommel. Losses increased with the arrival of improved Allied fighters such as the Supermarine Spitfire and escort carriers operated by task forces under admirals like Andrew Cunningham, prompting tactical shifts and reinforcement of anti-aircraft measures aboard convoys organized by institutions like the Royal Navy.

Variants

Several production and experimental variants existed, reflecting adaptations similar to contemporaneous conversions developed by firms like Dornier and Aviazione Legionaria. Notable versions included bomber-configured airframes for strategic missions, torpedo-equipped models optimized for anti-shipping roles, and transport adaptations used in liaison duties supporting establishments such as the Italian Social Republic. Export and licenced modifications were discussed with industrial partners in countries including Argentina and Chile, and improvised field modifications paralleled efforts seen in other types like the Savoia-Marchetti SM.81.

Tactical use and armament

Tactically, units employed formation tactics influenced by doctrines evolving from engagements observed in the Spanish Civil War and early World War II operations, coordinating with naval commands such as the Regia Marina for strike timing and with ground commands in campaigns like the Greco-Italian War. Armament configurations paralleled contemporary practice: fixed forward-firing machine guns for strafing similar to fittings on aircraft flown by aces like Francesco Agello, dorsal and ventral defensive mounts comparable to layouts on the Heinkel He 111, and internal bomb bays or external racks for torpedoes modeled on weapons used in attacks associated with battles like Matapan. Crew composition and night operation tactics adapted under pressure from improved Allied radar and fighters dispatched by formations such as RAF Fighter Command and carrier air groups from the Fleet Air Arm.

Production and operators

Production was concentrated in Italian factories operated by Savoia-Marchetti and subcontractors tied into industrial networks that included companies such as Ansaldo and Piaggio Aeronautica. Approximately 1,200–1,400 airframes were produced and operated by the Regia Aeronautica, while captured or exported examples served in limited numbers with forces including the Iraqi Air Force and post-armistice units within the Aeronautica Nazionale Repubblicana. After the 1943 armistice operations fragmented among factions and some airframes were seized by German formations like units attached to Luftflotte 4 for secondary roles. Surviving examples were evaluated by Allied technical missions postwar and studied in museums that curate collections from periods including exhibitions on the Second World War.

Category:Italian aircraft Category:World War II aircraft of Italy