NAVYPEDIA

Photo

Pier Capponi at war  

Ships

Name	No	Yard No	Builder	Laid down	Launched	Comp	Fate
Pier Capponi			Tosi, Taranto	8.1925	19.6.1927	1.1929	sunk 31.3.1941
Giovanni da Procida			Tosi, Taranto	9.1925	1.4.1928	1.1929	discarded 2.1948
Goffredo Mameli (ex-Masaniello)			Tosi, Taranto	8.1925	9.12.1926	1.1929	discarded 2.1948
Tito Speri			Tosi, Taranto	9.1925	25.5.1928	8.1929	discarded 2.1948

Technical data

Displacement standard, t	786
Displacement normal, t	810 / 993
Length, m	64.6
Breadth, m	6.51
Draught, m	4.30
No of shafts	2
Machinery	2 Tosi diesels / 2 CGE electric motors
Power, h. p.	3000 / 1100
Max speed, kts	17.2 / 7.7
Fuel, t	diesel oil 48
Endurance, nm(kts)	3500(8) / 110(3)
Armament	1 x 1 - 102/35 Schneider-Armstrong 1914-15, 2 x 1 - 13.2/76, 6 - 533 TT (4 bow, 2 stern, 10)
Electronic equipment	hydrophone
Complement	49
Diving depth operational, m	100

Standard scale images

Graphics

Project history

Design was developed by builder with usage of experience of former German submarines service, received by Italy after the First World War. Partially double-hulled. As a whole successful boats which have become the sample for subsequent submarines of the Italian fleet. Insufficient stability was unique appreciable defect of this class. For correction of it soon after the completion all four ships received external bulges. The  speed was lowered from 17.2/7.7 to 15/7.5kts.

Modernizations

1930, all: bulges were fitted, max speed was 15 / 7.5 kts.

1942, all survived: diesels were replaced by new Tosi engines (4000bhp, 17kts surfaced)

Naval service

Pier Capponi was sunk 31.3.1941 S of Stromboli by British submarine Rorqual.