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fighting ships of the world

UNITED STATES NAVY (UNITED STATES OF AMERICA)

SUBMARINES

"M" submarine (1918)

M1 1918

No Name Yard No Builder Laid down Launched Comm Fate
SS47 M1 223 Fore River, Quincy 7/1914 14/9/1915 2/1918 stricken 3/1922

 

Displacement standard, t

 

Displacement normal, t

488 / 676

Length, m

59.8

Breadth, m

5.80

Draught, m

3.40

No of shafts

2

Machinery

2 NLSE diesels / 2 electric motors

Power, h. p.

840 / 680

Max speed, kts

14 / 10.5

Fuel, t

diesel oil 83

Endurance, nm (kts) 2750(11) / 150(5)

Armament

1 x 1 - 76/23 Mk IX, 4 - 450 TT (bow, 8)

Complement

28

Diving depth operational, m

60

   

Ship project history: M1 was the first US double-hulled submarine. This type of construction was adopted because earlier single-hull types had insufficient reserve buoyancy. M1 had the same military characteristics as the 'L' class, but was about 20% larger, with about 27% reserve buoyancy, compared to 11.5% for Lake submarines, and 15.5% in Holland's 'L'. Seaworthiness was satisfactory, but the submarine was too crowded internally; she was considered less habitable than the single-hull types. In addition, when passing from submerged to surfaced condition (or vice versa), she had a considerable negative metacentric height, and tended to take a large list. This problem was solved in the 'T' (AA) class.

Modernizations: None.

Naval service: No significant events.

M1 1918

Ivan Gogin, 2014