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Italy's SIAI Marchetti S.M.84 bomber

Design

The Savoia Marchetti S.M.84 was designed by Alesandro Marchetti to be a replacement for the S.M.79.1 The S.M.84 kept the wing design but improved the fuselage and added more powerful engines.1

The S.M.84 had a wooden and steel tube frame with fabric, plywood, and aluminum making up the skin.1

Landing Gear

The landing gear was retracted into the engine housing.1

Armament

The bombs were carried in the fuselage and under the wings.1 Only 2,000 lbs of bombs could be carried internally.1 Two torpedoes could be carried externally.1

Prototype

The S.M.84 prototype first flew on June 5, 1940.1 While still ironing out the bugs, 246 were ordered.1

Production

  • Total: 3091
  • Manufacturer: SIAI Marchetti1

Variants

  • Savoia-Marchetti S.M.84:
  • Savoia-Marchetti S.M.84 bis: Cockpit and wings modified.1 The torpedo launching controls were updated.1 Engine ventilation was improved.1

Usage

The S.M.84 proved to be less maneuverable and didn't succeed in replacing the S.M.79.1 Attempts were made to make it a torpedo plane but that failed.1

First Use

In February 1941 the first bomber group received the S.M.84 for operations.1

After the Surrender

Some S.M.84s were captured by the Germans but did few operations.1

Ten S.M.84s were used by the Allies in a transportation group.1

After World War II

Some S.M.84s were used as transports until 1948.1

Specifications

  SIAI Marchetti S.M.841
Type Bomber1
Crew 51
Engine (Type) 3: Piaggio P.XI RC 401
Cylinders Radial 141
HP 1,000 each1
Cooling Air1
Propeller blades 3 metal variable pitch1
Dimensions  
Span 69' 4"1
Length 58' 10"1
Height 15' 1"1
Wing area  
Weight  
Empty  
Loaded 29,330 lb1
Maximum load  
Performance  
Speed @ 15,000' 268 mph1
Cruising speed  
Climb  
Service ceiling 25,900'1
Range 1,137 miles1
Armament  
Top turret 1: 12.7 mm MG1
Sides 2: 12.7 mm MG1
Underside 1: 12.7 mm MG1
Bombs 4,400 lb1
Torpedo 21

Sources:

  1. World War II Airplanes Volume 1, Enzo Angelucci, Paolo Matricardi, 1976
20th Century American Military History Crucial Site