2 × low-speed direct-drive Elliott electric motors[4]
two propellers [4]
5,400 shp (4.0 MW) surfaced[4]
2,740 shp (2.0 MW) submerged[4]
Speed
20.25 knots (38 km/h) surfaced[2]
8.75 knots (16 km/h) submerged[2]
Range
11,000 nautical miles (20,000 km) surfaced at 10 knots (19 km/h)[2]
Endurance
48 hours at 2 knots (3.7 km/h) submerged[2]
75 days on patrol
Test depth
400 ft (120 m)[2]
Complement
10 officers, 70–71 enlisted[2]
Armament
10 × 21-inch (533 mm) torpedo tubes
6 forward, 4 aft
24 torpedoes[6]
1 × 5-inch (127 mm) / 25 caliber deck gun[6]
Bofors 40 mm and Oerlikon 20 mm cannon
USS Piper (SS/AGSS-409), a Balao-class submarine, was a ship of the United States Navy named after the piper. Although built late in World War II, Piper completed three successful war patrols before the cessation of hostilities, operating as a life guard for plane strikes and as an advance picket for fast carrier task forces.
^ abcdefgFriedman, Norman (1995). U.S. Submarines Through 1945: An Illustrated Design History. Annapolis, Maryland: United States Naval Institute. pp. 285–304. ISBN 1-55750-263-3.
^ abcdefU.S. Submarines Through 1945 pp. 305-311
^ abcdefBauer, K. Jack; Roberts, Stephen S. (1991). Register of Ships of the U.S. Navy, 1775-1990: Major Combatants. Westport, Connecticut: Greenwood Press. pp. 275–280. ISBN 0-313-26202-0.
^ abcdeBauer, K. Jack; Roberts, Stephen S. (1991). Register of Ships of the U.S. Navy, 1775–1990: Major Combatants. Westport, Connecticut: Greenwood Press. pp. 275–282. ISBN 978-0-313-26202-9.
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