:: TYPE U 151 (1917) ::

Type U 151 cruiser submarine (1917) High resolution picture

In the peak of the First World War, the Deutschland transport submarine was reconverted into a U-Cruiser, and another six units of this type were promptly commissioned. These were the U 151, U 152, U 153, U 154, U 155 (ex Deutschland), U 156 and U 157. They were armed with two 150-millimeter cannons and two 88-millimeter cannons emplaced afore and abaft the conning tower. The large hold located abaft the conning tower, used for transporting victuals, was transformed into an arsenal and the refrigeration plants were removed. Being initially designed as mercantile vessels, these submarines did not offer good prestations as military units.

In 1916 the Deutschland effectuated two famous travels to United States as a commercial transport, but once this country entered the war she was reconverted into the U 155, an armed submarine. To compensate her light torpedo armament, the U 155 was later fitted with a total of six torpedo tubes, externally installed, which in the attached drawing are drawn with dashed line. The cannons are not depicted in the drawing, but she had them like the other units in her class. Unfortunately, the large cannons and arsenal onboard could not compensate the underpowered propulsion plant and the rather limited operational range.

Type U 151: 7 units (U 151 to U 157)

Type: Cruiser submarine

Length: 65 meters

Beam: 8.9 meters

Draught: 5.3 meters

Displacement (surfaced): 1512 tonnes

Displacement (submerged): 1875 tonnes

Propulsion: 2 x shaft, 2 x Diesel engine MWM 350 horsepower, 2 x electric motor Siemens-Schuckert 205 horsepower

Speed (surfaced): 12.7 knots (23.5 kilometers/hour)

Speed (submerged): 7.4 knots (13.7 kilometers/hour)

Range (surfaced): 3800 nautical miles (7000 kilometers) at 8 knots

Range (submerged): 40 nautical miles (74 kilometers) at 4 knots

Test depth: 80 meters

Complement: 56

Armament: 2 x 500-millimeter torpedo tube (6 x torpedo tube in U 155), 18 x torpedo, 2 x 150-millimeter deck cannon (1672 rounds), 2 x 88-millimeter deck cannon (764 rounds)

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