USS L-3
1915 L-class submarine
USS L-3 (SS-42), also known as "Submarine No. 42", was an L-class submarine of the United States Navy. She and her sister boats worked on submarine tactics in the Gulf of Mexico, Caribbean, and East Coast, prior to sailing to the Azores, and later stationed in Ireland, during WWI.
Design
The L-class boats designed by Electric Boat (L-1 to L-4 and L-9 to L-11) were built to slightly different specifications from the other L boats, which were designed by Lake Torpedo Boat, and are sometimes considered a separate class. The Electric Boat submarines had a length of 168 ft 6 in (51.4 m) overall, a beam of 17 ft 5 in (5.3 m) and a mean draft of 13 ft 7 in (4.1 m). They displaced 450 long tons (460 t) on the surface and 548 long tons (557 t) submerged. The L-class submarines had a crew of 28 officers and enlisted men. They had a diving depth of 200 feet (61.0 m).
For surface running, the Electric Boat submarines were powered by two 450-brake-horsepower (336 kW) diesel engines, each driving one propeller shaft. When submerged each propeller was driven by a 170-horsepower (127 kW) electric motor. They could reach 14 kn (26 km/h; 16 mph) on the surface and 10.5 kn (19.4 km/h; 12.1 mph) underwater.
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