Mark 11 torpedo

{{Use dmy dates|date=September 2024}}

{{Infobox weapon

| name = Mark 11 torpedo

| image = File:US Navy Mark 11 Torpedo.tif

| caption = The Mark 11 torpedo at Newport, Rhode Island, torpedo factory, June 1925.

| origin = United States

| type = Anti-surface ship torpedo{{cite web | title = Torpedo History: Torpedo Mk11 | url= http://www.history.navy.mil/museums/keyport/html/part2.htm | archive-url= https://web.archive.org/web/20121109202125/http://www.history.navy.mil/museums/keyport/html/part2.htm | url-status= dead | archive-date= 9 November 2012 | accessdate = 13 June 2013}}

| is_ranged = yes

| is_explosive = yes

| is_missile = yes

| service = 1926–1945

| used_by = United States Navy

| wars = World War II

| designer = Washington Navy Yard
Naval Torpedo Station

| manufacturer =Naval Torpedo Station

| design_date = 1926

| variants = Mod 1{{cite web | title = United States of America Torpedoes Pre-World War II | url= http://www.navweaps.com/Weapons/WTUS_PreWWII.htm | accessdate = 24 June 2013}}

| weight = 3511 pounds

| length = 271 inches

| diameter = 21 inches

| range = 6000–15,000 yards

| filling = Mk 11, TNT

| filling_weight = 500 pounds

| detonation = Mk 3, Mod 1 contact exploder

| engine = Turbine

| propellant =

| speed = 27–46 knots

| guidance = Gyroscope

| launch_platform = Destroyers

}}

The Mark 11 torpedo was the first American torpedo to be designed within the United States Navy without collaboration from industry. It was developed by the Washington Navy Yard in Washington, D.C., and the Naval Torpedo Station in Newport, Rhode Island. The Mark 11 torpedo was also the first to feature a three-speed setting capability while tube-loaded: high at 46 knots, medium at 34 knots and low at 27 knots. Due to stability problems it was supplemented by the Mark 12 torpedo within two years, which had a 44-knot high speed setting.