Savoia-Marchetti SM.84
| SM.84 | |
|---|---|
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| Role | Bomber/Torpedo-bomber |
| Manufacturer | Savoia-Marchetti |
| First flight | 5 June 1940 |
| Introduction | 1941 |
| Retired | 1948 |
| Primary user | Regia Aeronautica |
| Number built | 329 |
The Savoia-Marchetti SM.84, not to be confused with the Savoia-Marchetti S.84 airliner prototype, was an Italian bomber aircraft of World War II. It was designed by Savoia-Marchetti as a replacement for its successful SM.79, and shared its three-engine layout. However, although it entered service with the Regia Aeronautica in 1941, it never replaced the SM.79, being retired from service before it.
Development of an aircraft to replace the SM.79 started in 1939, with Savoia-Marchetti choosing to produce an improved development of the SM.79, using the same wing as its predecessor, but with a new fuselage and more powerful engines. The first prototype flew on 5 June 1940, just 5 days before Italy's entry into World War II.
It was hoped to replace the SM.79s in service, which were fast, but obsolescent, and yet to be adapted as torpedo bombers. The main improvement was the adoption of new and more powerful engines, giving a total output of 2,237 kW (3,000 hp). The machine was put into series production at the end of 1940.
Basically it was an enhanced SM.79, with more modern solutions and systems It shared the basic design of a three-engine mixed construction monoplane as the SM.79. Wood was used for the wings, supported by three spars. Steel tubing was used as a skeleton for the fuselage, covered by metal (forward), fabric and wood. The new fuselage housed a crew of five to six, with the pilots sitting side-by-side. Behind them there were a radio-operator and flight engineer. They enjoyed a large windscreen and eight windows in the fuselage.
The armour was much improved compared to the almost nonexistent protection fitted to the SM.79; it was said there was a total of 700 kg (1,540 lb) fitted, however it is unclear if this also included the self-sealing fuel tanks, bullet-proofed up to 12.7 mm (.50 in) rounds. One noticeable difference was the twin tail, which gave a better field of fire to the dorsal gun, and helped to cope with the greater power and weight compared to the SM.79.
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