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GUGLIELMO MARCONI large submarines (1940)


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Guglielmo Marconi 1941  

Ships


Name No Yard No Builder Laid down Launched Comp Fate
Maggiore Baracca     OTO, Muggiano 3.1939 21.4.1940 7.1940 sunk 8.9.1941
Michele Bianchi     OTO, Muggiano 2.1939 3.12.1939 4.1940 sunk 7.8.1941
Leonardo da Vinci     CRDA, Monfalcone 9.1938 16.9.1939 4.1940 sunk 23.5.1943
Alessandro Malaspina     OTO, Muggiano 3.1939 18.2.1940 6.1940 sunk 21.9.1941
Guglielmo Marconi     CRDA, Monfalcone 9.1938 30.7.1939 2.1940 sunk perhaps 11.1941
Luigi Torelli     OTO, Muggiano 2.1939 6.1.1940 5.1940 captured by Japan 10.9.1943 (German UIT25)


Technical data


Displacement standard, t1036
Displacement normal, t

1175 / 1465

Length, m

76.5

Breadth, m

6.81

Draught, m

4.72

No of shafts

2

Machinery

2 CRDA diesels / 2 Marelli electric motors

Power, h. p.

3600 / 1500

Max speed, kts

17.8 / 8.2

Fuel, t

diesel oil 118

Endurance, nm(kts)10500(8) / 110(3)
Armament

1 x 1 - 100/47 OTO 1938, 2 x 2 - 13.2/76, 8 - 533 TT (4 bow, 4 stern, 12)

Electronic equipmenthydrophone
Complement

57

Diving depth operational, m90


Standard scale images


<i>Guglielmo Marconi</i> 1940
Guglielmo Marconi 1940
<i>Leonardo da Vinci </i>1942
Leonardo da Vinci 1942


Graphics


<i>Guglielmo Marconi</i> 1941  
Guglielmo Marconi 1941  


Project history

Development of Marcello class. Single-hulled, with external bulges. For raise of submerged speed the hull was made narrower and longer, than at Marcello, with the same purpose more powerful electric motors were installed, however a speed increment was appeared insignificant. The fuel stowage was besides, a little increased. In order to avoid decrease of stability because of smaller hull beam the number of 100mm/47 guns was shrunk to one and the sizes of CT were moderated.

In 1943 Luigi Torelli was converted to transport for routes to Japan.

Modernizations

1942, Leonardo da Vinci: - 1 x 1 - 100/47; + 1 CA midget submarine (tests only)

1943, Luigi Torelli: was converted to transport.

Naval service

Michele Bianchi was sunk 7.8.1941 W of Gibraltar by British submarine Severn. Maggiore Baracca was sunk 8.9.1941 by ramming of British escort destroyer Croome NE of Azores. Alessandro Malaspina was lost in September, 1941 in Atlantic, probably sunk by British destroyer Vimy. Guiglielmo Marconi was lost in October, 1941 in Atlantic. Leonardo da Vinci was sunk 23.5.1943 NE of Azores by British destroyer Active and frigate Ness. Luigi Torelli was captured by Japanese 10.9.1943 at Singapore, transferred to Germany and renamed UIT25. Subsequently she was transferred to Japanese, receiving name I504, and scuttled after war by Americans.