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fighting ships of the world

UNITED STATES NAVY (UNITED STATES OF AMERICA)

SUBMARINES

PORPOISE submarines (1935)

Pike 1943

No Name Yard No Builder Laid down Launched Comm Fate
SS172 Porpoise   Portsmouth N Yd 10/1933 20/6/1935 8/1935 Naval Reserve TS 5/1947, stricken 8/1956
SS173 Pike   Portsmouth N Yd 12/1933 12/9/1935 12/1935 Naval Reserve TS 9/1946, stricken 2/1956

 

Displacement standard, t

 

Displacement normal, t

1316 / 1934

Length, m

88.1 wl 91.8 oa

Breadth, m

7.59

Draught, m

4.29

No of shafts

2

Machinery

4 Winton diesel-generators / 2 electric motors

Power, h. p.

4300 / 2085

Max speed, kts

19 / 10

Fuel, t

diesel oil 347

Endurance, nm (kts) 10000 (10) / 42 (5)

Armament

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

Sensors

QC, JK sonars

Complement

54

Diving depth operational, m

75

     

Ship project history: Project was designed on basis of construction of Cachalot class submarines. Dimensions and displacement were notably increased, that allowed to install more powerful diesels and make engine room more spaciously (in comparison with very tight and inconvenient for diesels maintenance engine room on Cachalot). Abandoning from rigid connection of diesel with propeller shaft and transition to an electrical drive became an important innovation of this class also. Introduction of generators on diesel shafts was partly indemnified by abandoning from using of auxiliary diesel-generator serving only for battery recharging. New scheme ensured much more flexible machinery usage, allowing significant expedite process of recharging or to recharge battery almost on full speed. Advantage of diesel-electric gear was showed as in appreciable decrease in vibration.

On boats of this class the special attention has been given to improvement of habitability conditions, in particular, for the first time they received air conditioners. Double-hulled.

Financing of building of this class was conducted within the limits of National Industrial Recovery Act accepted in 1933. There existed two detailed projects, developed by Bureau of construction (SS172 and 173) and Electric Boat (SS174 and 175).

Modernizations: 1942 - 1943, both: CT was rebuilt; - 2 x 1 - 12.7/90; + 2 x 1 - 20/70 Mk 4, 2 - 533 TT (ext stern, 18 torpedoes totally), SD, SJ radars

1/1946, SS172, 173: 8 - 533 TT (4 bow, 2 stern, 2 ext stern, 18), 1 x 1 - 76/50 Mk 11, 2 x 1 - 20/70 Mk 10, SD, SJ radars; QC, JK sonars

Naval service: No significant events.

Porpoise 1942

Ivan Gogin, 2014-15