- Background
- Ships in class
- References
- External links
- Notes
{{Infobox ship image| Ship image=Japanese submarine HA-7 in 1916.jpg | Ship caption= Japanese submarine Ha-7, in trials off Kure, 1916
}}{{Infobox ship class overview | Name= | Builders=Kure Naval Arsenal, Japan | Empire of Japan}} | Class before=Ha-3 class submarine | Class after=Kaichū type submarine | Subclasses= | Cost= | Built range= | In service range= | In commission range= 1916–1929 | Total ships building= | Total ships planned= | Total ships completed=2 | Total ships cancelled= | Total ships active= | Total ships laid up= | Total ships lost= | Total ships retired=2 | Total ships preserved=
}}{{Infobox ship characteristics | Hide header= | Header caption= | Ship type=Submarine | 286|LT|t|abbr=on}} surfaced- {{convert|321|LT|t|abbr=on}} submerged
| 43.3|m|ft|abbr=on}} | 4.14|m|ft|abbr=on}} | 3.43|m|ft|abbr=on}} | 600|hp|kW|lk=in|abbr=on}} (gasoline engines)- {{convert|300|hp|kW|abbr=on}} (electric motors)
| Ship propulsion=*Gasoline engines | 12|kn|lk=in}} surfaced- {{convert|7|kn}} submerged
| Ship range=*660 nm @ 12 knots (surfaced)- 60 nm @ 8.5 knots (submerged)
| 30.5|m|ft}} | Ship capacity= | Ship complement=26 officers and enlisted | 18|in|mm|abbr=on}} bow torpedo tubes (4 × torpedoes) | Ship notes=
}} | The {{nihongo|Ha-7 class submarine|波七型潜水艦|Ha-nana-gata sensuikan}} was an early class of submarines of the Imperial Japanese Navy. It was also called the "Vickers C-3 class".[1] BackgroundA final two vessels of the British C class submarine design were built completely in Japan by the Kure Naval Arsenal as part of the emergency expansion of the Imperial Japanese Navy due to World War I. Although the design was considered obsolete by this time, these vessels were felt necessary to meet the perceived threat of German submarine activity in Japanese coastal waters. Physically almost identical to the Ha-3 class, the two vessels incorporated a number of improvements, including a change in the location of the rudder for better control, and the addition of two externally mounted torpedo tubes to double the attack capability from previous designs. Arriving in Japan during the closing stages of the war, neither vessel was ever used in combat. Ships in class- {{nihongo|Japanese submarine Ha-7|波号第七潜水艦|Ha-go Dai-nana sensuikan}}, laid down 1 August 1916; launched 15 March 1916; commissioned 1 November 1916 as 2nd Class Submersible No.16; reclassified as 3rd class submarine on 1 April 1919; renamed Ha-7 on 15 June 1923, decommissioned on 1 December 1929.[2]
- {{nihongo|Japanese submarine Ha-8|波号第八潜水艦|Ha-go Dai-hachi sensuikan }}, laid down 1 August 1916; launched 15 March 1916; commissioned 2 February 1917 as 2nd Class Submersible No.17; reclassified as 3rd class submarine on 1 April 1919; renamed Ha-8 on 15 June 1923; decommissioned on 1 December 1929.[2]
References- {{cite book|last= Chesneau |first= Roger|title= Conway's All the World's Fighting Ships, 1906–1921. |publisher= Naval Institute Press |year=1985|isbn=0-87021-907-3 }}
- {{cite book|last=Howarth|first=Stephen|title=The Fighting Ships of the Rising Sun: The Drama of the Imperial Japanese Navy, 1895–1945|publisher=Atheneum|year=1983|isbn=0-689-11402-8}}
- {{cite book|last=Jentsura|first=Hansgeorg|title=Warships of the Imperial Japanese Navy, 1869–1945|publisher=Naval Institute Press|location=Annapolis, MD|year=1976|isbn=0-87021-893-X}}
- {{cite book|last=Schencking|first=J. Charles|title=Making Waves: Politics, Propaganda, And The Emergence Of The Imperial Japanese Navy, 1868–1922|publisher=Stanford University Press|year=2005|isbn=0-8047-4977-9}}
External links- {{cite web| last = Nishida| first = Hiroshi| url = http://homepage2.nifty.com/nishidah/e/stc0507.htm |title = Materials of IJN| work = Imperial Japanese Navy| accessdate = }}
Notes1. ^{{cite book|last= Chesneau |first= Roger|title= Conway's All the World's Fighting Ships, 1906–1921. |publisher= Naval Institute Press |year=1985|isbn=0-87021-907-3|page=246 }}
2. ^1 Nishida, Materials of the Imperial Japanese Navy
4 : Submarine classes|Submarines of the Imperial Japanese Navy|Ships built in Japan|1916 ships |