Savoia Marchetti SM-79

Savoia Marchetti SM-79
Country	Italy
Role	Bomber
First flight	28 September 1934
Built	1240

The Savoia-Marchetti SM.79 Sparviero (Italian for sparrowhawk) was a three-engined Italian medium bomber with a wood-and-metal structure. Originally designed as a fast passenger aircraft, between 1937 and 1939 this low-wing monoplane set 26 world records, qualifying it for some time as the fastest medium bomber in the world. It first saw action during the Spanish Civil War and flew on all fronts in which Italy was involved during World War II.

Source: Savoia Marchetti SM-79 on Wikipedia

Savoia Marchetti SM-79
Photographer	Unknow
Localisation	Unknow
Photos	26

Savoia Marchetti SM-79 02

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SIAI SM.79 Sparviero Walk Around
Photographer	Libor Spurek
Localisation	Unknow
Photos	40

Savoia-Marchetti S.M.79 Sparviero Walk Around
Photographer	Eli Raphael
Localisation	Unknow
Photos	33

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Savoia-Marchetti S.M.79 Sparviero 9

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The Hunchback of the Mediterranean

The Savoia-Marchetti SM.79 Sparviero (Sparrowhawk) was Italy’s most famous and effective multi-mission bomber of World War II. Originally designed in the mid-1930s as a fast, civilian commercial transport, its sleek lines and impressive speed records quickly caught the attention of the Regia Aeronautica. Despite its unusual three-engine configuration and mixed-material construction—which earned it the affectionate nickname “Gobbo Maledetto” (Damned Hunchback)—the SM.79 evolved into one of the finest land-based torpedo bombers of the entire war, inflicting heavy losses on Allied shipping and naval fleets across the Mediterranean.

Attribute	Technical Specification (SM.79-II Variant)
Role	Medium Bomber / Torpedo Bomber
Crew	5–6 (Pilot, Co-Pilot, Flight Engineer, Radio Operator, 1-2 Gunners)
Engine	3 × Alfa Romeo 126 RC.34 9-cylinder air-cooled radial engines (750 hp each)
Maximum Speed	430 km/h (267 mph) at 4,100 m
Combat Range	2,600 km (1,615 miles)
Service Ceiling	7,500 m (24,600 ft)
Primary Weaponry	3 × 12.7mm Breda-SAFAT machine guns (forward hump, dorsal, and ventral positions); 1 × 7.7mm Lewis gun
Torpedo/Bomb Load	Up to 2 × 450mm (17.7 in) aerial torpedoes externally, or 1,250 kg (2,750 lbs) of internal bombs

Design Engineering: Mixed Material Airframe and Trimotor Thrust

The “Wood and Fabric” Core: While contemporaries like the Boeing B-17 moved toward all-metal monocoque shells, designer Alessandro Marchetti built the SM.79 using a traditional framework of welded steel tubing, wrapped in a combination of duralumin skinning, lightweight plywood, and doped fabric. Remarkably, this mixed-material approach made the Sparviero incredibly rugged, flexible under stress, and able to float for long periods if forced to ditch at sea.
The Trimotor Configuration: The three-engine layout was a classic Italian aviation choice. It guaranteed immense safety over water; if one engine failed or was shot out by enemy fighters, the remaining two powerplants produced enough combined horsepower to keep the heavy bomber flying and get the crew safely back to base.
The Defiant Hump: The prominent “hump” directly behind the cockpit was not a structural accident—it served an aggressive aerodynamic and tactical purpose. It housed the heavy 12.7mm forward-firing machine gun used by the pilot to strafe surface targets and enemy anti-aircraft nests, while providing an elevated, protected greenhouse for the rear dorsal gunner to defend the tail arc.
The Vertical Internal Bomb Bay: Because of the aircraft’s original design as a passenger transport, the internal bomb bay was forced to carry its payload vertically rather than horizontally. This meant bombs had to be dropped tail-first, a quirk that severely hampered bombing accuracy during high-altitude level attacks and eventually pushed the aircraft into its legendary low-level torpedo-bombing role.

Operational History: Racing Champions to Scourge of the Royal Navy

Pre-War Racing Dominance: Before firing a shot in anger, modified civilian variants (SM.79CS) swept international aviation races. In 1937, a squadron of these planes finished first, second, and third in the prestigious Istres-Damascus-Paris race, proving to the world that Italy possessed some of the fastest long-range aircraft in existence.
The Crucible of the Spanish Civil War: Operating under the *Aviazione Legionaria*, the SM.79 saw intensive combat over Spain supporting Nationalist forces. Its raw speed meant that early Republican biplane fighters often could not catch it in a level chase, solidifying its reputation and giving Italian commanders a false sense of security regarding its defensive layout.
The Torpedo Terror: When World War II erupted, the Sparviero found its true calling. Elite specialized units known as the *Aerosiluranti* took the SM.79 into daring, skimming, low-altitude runs directly into the teeth of Allied naval radar and anti-aircraft fire. They successfully sank or heavily damaged numerous high-profile British warships, including the aircraft carriers HMS *Argus* and HMS *Indomitable*.
The Agony of the Air Crews: Despite its legendary toughness, by 1942 the SM.79 was showing its age. Without armor protection or self-sealing fuel tanks, and lacking modern defensive turrets, it became increasingly vulnerable to heavy Allied fighters like the Bristol Beaufighter and modern Spitfires, leading to high casualty rates among Italy’s finest and most courageous aviators.