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Pietro Calvi 1966

Ships

Name	No	Yard No	Builder	Laid down	Launched	Comp	Fate
Alluminio			OTO, Muggiano	12.1942	---	---	captured by Germany 9.9.1943
Antimonio			OTO, Muggiano	12.1942	---	---	captured by Germany 9.9.1943
Pietro Calvi (ex-Bario)	S503		CRDA, Monfalcone // Tosi, Taranto	3.1943	23.1.1944 // 21.6.1959	16.12.1961	captured by Germany 9.9.1943 (UIT7), rebuilt 1957 - 1961, discarded 1.1972
Cromo			CRDA, Monfalcone	9.1943	---	---	captured by Germany 10.9.1943
Ferro			CRDA, Monfalcone	6.1943	---	---	captured by Germany 10.9.1943 (UIT12)
Fosforo			OTO, Muggiano	12.1942	---	---	captured by Germany 9.9.1943
Litio			CRDA, Monfalcone	3.1943	19.2.1944	---	captured by Germany 10.9.1943 (UIT8)
Manganese			OTO, Muggiano	12.1942	---	---	captured by Germany 9.9.1943
Piombo			CRDA, Monfalcone	8.1943	---	---	captured by Germany 10.9.1943 (UIT13)
Potassio			CRDA, Monfalcone	5.1943	---	---	captured by Germany 10.9.1943 (UIT10)
Rame			CRDA, Monfalcone	6.1943	---	---	captured by Germany 10.9.1943 (UIT11)
Silicio			OTO, Muggiano	12.1942	---	---	captured by Germany 9.9.1943
Sodio			CRDA, Monfalcone	5.1943	16.3.1944	---	captured by Germany 10.9.1943 (UIT9)
Zinco			CRDA, Monfalcone	8.1943	---	---	captured by Germany 10.9.1943 (UIT14)
Zolfo			OTO, Muggiano	12.1942	---	---	captured by Germany 9.9.1943

Technical data

Data variant	as designed	Pietro Calvi as completed
Displacement standard, t	766	800
Displacement normal, t	913 / 1113	905 / 1107
Length, m	64.2	66.0
Breadth, m	6.98	6.98
Draught, m	4.93	4.00
No of shafts	2	1
Machinery	2 Fiat diesels / 2 CRDA electric motors	2 MAN diesels / 3 electric motors
Power, h. p.	2400 / 800	2700 / 2700
Max speed, kts	16 / 8	14 / 14
Fuel, t	diesel oil 52 (norm.)	diesel oil
Endurance, nm(kts)	5400(8) / 80(4)	10000(8) /
Armament	1 x 1 - 100/47 OTO 1938, 2 x 1 - 20/70 Scotti-Isotta Fraschini 1939, 6 - 533 TT (4 bow, 2 stern, 12)	4 - 533 TT (bow, 8)
Electronic equipment	hydrophone	radar, sonar
Complement	50	60
Diving depth operational, m	120	120

Standard scale images

Graphics

Project history

Differed from the 1st series by only slightly increased hull length. 24 submarines were ordered, but till September, 1943 only 15 were laid down. 12 submarines of 3rd series were ordered in 1943, but no one submarine was laid down.

All 15 laid submarines 9.9.1943 have come into German hands. Seven boats being in a low degree of readiness (Alluminio, Antimonio, Fosforo, Manganese, Silicio, Zolfo and Cromo) were broken up on slipways. 8 ships of remaining has been decided to complete. Bario, Litio, Sodio, Potassio, Rame, Ferro, Piombo and Zinco were renamed UIT7-14 respectively. First three were launched, however all of them have been damaged during raid of Allied aircraft 16.3.1945 and 1.5.1945 scuttled by Germans. Remaining submarines this day were blown up on slipways. In 1945 Italians salvaged Bario and after restoring repair completed her as Pietro Calvi.

There were submarines that ordered but never laid down: Amianto, Magnesio, Mercurio (Tosi, Taranto), Cadmio, Iridio, Oro, Ottone, Rutenio, Vanadio (CRDA, Monfalcone). Other 12 submarines of III series were ordered: 6 from CRDA, 3 from Tosi and 3 from OTO. They possible names were Attinio, Azoto, Bromo, Carbonio, Elio, Molibdeno, Osmio, Ossigeno, Plutonio, Radio, Selenio and Tungsteno.

Modernizations

None.

Naval service

No significant events.