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Italy's Savoia-Marchetti SM.84 transport, Savoia-Marchetti SM.84 bomber

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  • Savoia-Marchetti SM.84 transport
  • Savoia-Marchetti SM.84 bomber

 

Design

In 1935 there was a two engine civilian passenger aircraft that had the Savoia-Marchetti SM.84 designation but it never went into production.

The Savoia-Marchetti SM.84 was designed by Alesandro Marchetti to be a replacement for the S.M.79. It had been originally designated the SM.79bis and then SM.94 but it was finally designated the SM.84. The SM.84 kept the wing design but improved the fuselage and added more powerful engines.

The SM.84 had a wooden and steel tube frame with fabric, plywood, and aluminum making up the skin.

Landing Gear

The landing gear was retracted into the engine housing.

Armament

The bombs were carried in the fuselage and under the wings. Only 2,000 lbs of bombs could be carried internally. Two torpedoes could be carried externally.

Prototype

The SM.84 prototype first flew in/on 1938/June 5, 1940. While still ironing out the bugs, 246 were ordered.

Production

  • Savoia-Marchetti SM.84 transport:
  • Savoia-Marchetti SM.84 bomber: >100, 309
  • Manufacturer: Savoia-Marchetti

Variants

  • Savoia-Marchetti SM.84: Transport.
  • Savoia-Marchetti SM.84: Bomber.
  • Savoia-Marchetti SM.84 bis: Cockpit and wings modified. The torpedo launching controls were updated. Engine ventilation was improved.

Usage

The SM.84 proved to be less maneuverable, which crews disliked, and didn't succeed in replacing the S.M.79. Attempts were made to make it a torpedo plane but that failed.

First Use

In February 1941 the first bomber group received the SM.84 for operations.

Attacking Convoys

The 282a Squadriglia was based in Sicily and attacked convoys from November 1941 to August 1942.

Malta

The 4° and 25° Gruppi B.T. that were based in Sicily were used to attack Malta.

After the Surrender

Some SM.84s were captured by the Germans but did few operations.

Ten SM.84s were used by the Allies in a transportation group.

After World War II

Some SM.84s were used as transports until 1948.

Specifications

  SM.84 Transport
Type Transport
Passengers 18
Baggage 594 lb
Cargo, Mail 1,144 lb
Engine (Type) 2: Gnôme-Rhône 14 Krsd
Cylinders Radial 14
HP 900 each
Cooling Air
Propeller blades 3
Dimensions  
Span 78' 8.75"
Length 64' 11 1/3"
Height 15' 7"
Wing area 1,000.7 sq ft
Weight  
Empty 13,200 lb
Loaded 20,900 lb
Performance  
Speed at 6,560' 220 mph
Speed - Cruising 196 mph
Climb to 13,120' 18 minutes
Service Ceiling 25,584'
Range 621 miles
  SM.84 Bomber
Type Bomber
Crew 5
Engine (Type) 3: Piaggio P.XI RC 40
Cylinders Radial 14
HP 1,000 each
Cooling Air
Propeller blades 3 metal variable pitch
Dimensions  
Span 69' 4", 69' 6 5/8"
Length 58' 4 5/8", 58' 10"
Height 14' 9 1/8", 15' 1"
Wing area 656.6 sq ft
Weight  
Empty 19,465 lb
Loaded 29,235 lb, 29,330 lb
Performance  
Speed 266 mph
Speed at 15,000' 268 mph
Speed - Cruising 247 mph
Service Ceiling 25,900', 29,512'
Range 1,130 miles, 1,137 miles
Armament  
Turret - Dorsal 1: 12.7 mm
Sides 2: 12.7 mm
4: 12.7 mm
Gondola 1: 12.7 mm
Bombs 4,400 lb
Torpedo 2

Sources:

  1. World War II Airplanes Volume 1, Enzo Angelucci, Paolo Matricardi, 1976
  2. Italian Civil and Military Aircraft 1930-1945, Jonathan Thompson, 1963
20th Century American Military History Crucial Site