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fighting ships of the world

REGIA MARINA (ITALY)

SUBMARINES

PIETRO CALVI large submarines (1935-1936)

Pietro Calvi 1940

Enrico Tazzoli 1942

Name No Yard No Builder Laid down Launched Comp Fate
Pietro Calvi     OTO, Muggiano 7/1932 31/3/1935 10/1935 scuttled 15/7/1942
Giuseppe Finzi     OTO, Muggiano 8/1932 29/6/1935 1/1936 captured by Germany 9/9/1943 (UIT21)
Enrico Tazzoli     OTO, Muggiano 9/1932 14/10/1935 4/1936 lost probably 16/5/1943
  

Displacement standard, t

1331

Displacement normal, t

1525 / 2028

Length, m

84.3

Breadth, m

7.70

Draught, m

5.20

No of shafts

2

Machinery

2 Fiat diesels / 2 San Giorgio electric motors

Power, h. p.

4400 / 1800

Max speed, kts

16.8 / 7.4

Fuel, t

diesel oil 249

Endurance, nm(kts) 13400(8) / 80(4)

Armament

Pietro Calvi, Giuseppe Finzi: 2 x 1 - 120/45 OTO 1931, 2 x 2 - 13.2/76, 8 - 533 TT (4 bow, 4 stern, 16)

Enrico Tazzoli: 2 x 1 - 120/45 OTO 1931, 2 x 2 - 13.2/76, 8 - 533 TT (4 bow, 4 stern, 12), 14 mines

Sensors hydrophone

Complement

77

Diving depth operational, m 100

Ship project history: Submarine cruisers for service in Red sea and Indian ocean. Improved Balilla. Double-hulled. An auxiliary diesel was not installed on these boats, and high endurance has been received for the account of increase of fuel tanks volume and installation of more efficient main diesels with some lower power. To raise a stability, a hull form was changed, that, in turn, has led to some raise of speed, in comparison with predecessors, despite smaller engine power. Abandoning from an auxiliary diesel has allowed to strengthen armament notably: number of 120mm guns was increased to two, and TTs to eight.

In 1943 Enrico Tazzoli and Giuseppe Finci were converted to transport submarines for routes to Japan.

Modernizations: 1943, Enrico Tazzoli: was converted to transport (ammunition and petrol) (Giuseppe Finzi was converted after 8/9/1943 by Germans).

Naval service: Pietro Calvi was sunk 15/7/1942 S of the Azores by British sloop Lulworth. Enrico Tazzoli was lost in May, 1943 in bay of Biscay, the reason is not known (probably sunk 16/5/1943 by Allied aircraft). Giuseppe Finci was captured by German troops 9/9/1943, renamed UIT21 and scuttled at Bordeaux 25/8/1944.

Giuseppe Finzi 1942

 

Ivan Gogin, 2009-14