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fighting ships of the world

UNITED STATES NAVY (UNITED STATES OF AMERICA)

SUBMARINES

CACHALOT submarines (1933-1934)

Cachalot 1940

No Name Yard No Builder Laid down Launched Comm Fate
SS170 Cachalot   Portsmouth N Yd 10/1931 19/10/1933 12/1933 stricken 11/1945
SS171 Cuttlefish 17 Electric Boat, Groton 10/1931 21/11/1933 6/1934 stricken 7/1946

 

Displacement standard, t

 

Displacement normal, t

1120 / 1650

Length, m

80.8 wl 82.9 oa

Breadth, m

7.54

Draught, m

4.27

No of shafts

2

Machinery

2 MAN diesels / 2 electric motors

Power, h. p.

2770 / 1600

Max speed, kts

17 / 8

Fuel, t

diesel oil 333

Endurance, nm (kts) 9000 (12) / 50 (5)

Armament

1 x 1 - 76/50 Mk 17/18, 3 x 1 - 12.7/90, 6 - 533 TT (16, 4 bow, 2 stern)

Sensors

QC, JK sonars

Complement

51

Diving depth operational, m

75

     

Ship project history: Occurrence of these boats with small (to the American measures) displacements speaks by several reasons. First, accepted by the London Naval conference of 1930 limitation assigned on displacement of submarines left only one way for increase in number of these ships: reduction of their dimensions. Secondly, the comparison of Dolphin with from one of the best German submarine of First World War U135 appeared not in favour of the American submarine which at appreciable bigger displacement exceeded German sub only in an endurance, yielding on the majority of remaining characteristics.

Taking into account these factors the project of new submarine, with German "roots" was ready, but fulfilled on new technological level, in particular, with wide usage of welding instead of traditional riveting. Double-hulled, diesels driven shafts directly.

Though a number of experts also responded Cachalot as not quite successful ship, she became ancestor of the majority later fleet submarines of the USN.

Modernizations: 1938, both: diesels were replaced by more powerful ones (3100hp)

1940s, both: + SD, SJ radars

1/1946, SS171: 6 - 533 TT (4 bow, 2 stern, 16), 1 x 1 - 76/50 Mk 11, 3 x 1 - 12.7/90, SD, SJ radars, QC, JK sonars

Naval service: No significant events.

 

Cuttlefish 1930s

Ivan Gogin, 2014-15