Type A1 submarine
| {{Infobox ship begin
}} {{Infobox ship image | Ship image = Japanese submarine I-10 at Penang port in 1942.jpg | Ship caption = I-10 in Penang, 1942 }} {{Infobox ship class overview |Name= |Builders= |Operators={{navy|Empire of Japan}} |Class before=Type J3 submarine |Class after=Type A2 submarine |Cost= |Built range=1939–1942 |In service range= 1941–1944 |In commission range= |Total ships planned=5 |Total ships completed=3 |Total ships cancelled=2 |Total ships lost=3 }} {{Infobox ship characteristics | Hide header = | Header caption = | Ship type = Cruiser submarine | Ship displacement = *{{Cvt|2919|LT|t|0|disp=flip|lk=on}} (surfaced)
| Ship length = {{convert|113.7|m|ft|0|abbr=on}} (o/a) | Ship beam = {{convert|9.5|m|ftin|abbr=on}} | Ship draft = {{convert|5.3|m|ftin|abbr=on}} | Ship power = *{{cvt|12400|bhp|lk=on}} (diesel)
| Ship propulsion = *Diesel-electric
| Ship speed = *{{convert|23.5|kn|lk=in}} (surfaced)
| Ship range = *{{convert|16000|nmi|abbr=on|lk=in}} at {{convert|16|kn}} (surfaced)
| Ship crew = 100 | Ship test depth = {{convert|100|m|ft|abbr=on}} | Ship armament = *6 × bow {{convert|533|mm|in|0|abbr=on}} torpedo tubes | Ship aircraft = 1 × Yokosuka E14Y seaplane | Ship aircraft facilities = 1 × catapult | Ship notes = }} |
The {{nihongo|Type A1 submarine|巡潜甲型潜水艦|Junsen kō-gata sensuikan, "Cruiser submarine type A"}}, also called {{nihongo|I-9-class submarine|伊九型潜水艦|I-kyū-gata sensuikan}} were a trio of aircraft-carrying cruiser submarines built for the Imperial Japanese Navy (IJN) during the 1930s. All three participated in the Pacific War and were lost.
Design and description
The submarines of the A1 type were versions of the preceding J3 class with superior range, improved aircraft installation. Unlike the earlier boats, they were equipped with extensive communication facilities to allow them to serve as squadron flagships. They displaced {{Convert|2919|LT|t|0|disp=flip|lk=on|sp=us}} surfaced and {{Cvt|4129|LT|t|0|disp=flip}} submerged. The submarines were {{convert|113.7|m|ft|0|sp=us}} long, had a beam of {{convert|9.5|m|ftin|sp=us}} and a draft of {{convert|5.3|m|ftin|sp=us}}. They had a diving depth of {{convert|100|m|ft|sp=us}}.Bagnasco, p. 188
For surface running, the boats were powered by two {{convert|6200|bhp|lk=in|0|adj=on}} diesel engines, each driving one propeller shaft. When submerged each propeller was driven by a {{convert|1200|hp|0|adj=on}} electric motor. They could reach {{convert|19|kn|lk=in}} on the surfaceChesneau, p. 200 and {{convert|8.25|kn}} underwater. On the surface, the A1s had a range of {{convert|16000|nmi|lk=in}} at {{convert|16|kn}}; submerged, they had a range of {{convert|90|nmi|abbr=on}} at {{convert|3|kn}}.
The boats were armed with six internal bow {{convert|53.3|cm|in|0|abbr=on|sp=us}} torpedo tubes and carried a total of 18 torpedoes. They were also armed with a single 40-caliber 14 cm/40 11th Year Type naval gun deck gun and two twin Type 96 25 mm AT/AA Gun anti-aircraft guns.Carpenter & Dorr, p. 101
Unlike the J3 class, the aircraft hangar was integrated into the conning tower and faces forward; the positions of the deck gun and the catapult were exchanged so the aircraft could use the forward motion of the ship to supplement the speed imparted by the catapult. The hangar could be accessed from inside the pressure hull and the floatplane was stowed with its wings folded.
Boats
- {{ship|Japanese submarine|I-9||2}} was sunk by destroyer USS Frazier in the Aleutians on 11 June 1943.
- {{ship|Japanese submarine|I-10||2}} was sunk by destroyer USS David W. Taylor and destroyer escort USS Riddle east of Saipan on 4 July 1944.
- {{ship|Japanese submarine|I-11||2}} disappeared south of Funafuti after 11 January 1944. The I-11 probably struck a mine laid by USS Terror.
Two more boats were ordered under the 1942 Naval Program, but were later cancelled.
Notes
{{Reflist|30em}}
References
- {{cite book|last=Bagnasco |first=Erminio |title=Submarines of World War Two |year=1977 |publisher=Naval Institute Press |location=Annapolis, Maryland |isbn=0-87021-962-6}}
- {{cite book|last1=Boyd|first1=Carl|last2=Yoshida|first2=Akikiko|title=The Japanese Submarine Force and World War II|date=2002|publisher=Naval Institute Press|location=Annapolis, Maryland|isbn=1-55750-015-0|name-list-style=amp}}
- {{cite book|last1=Carpenter|first1=Dorr B.|last2=Polmar|first2=Norman|title=Submarines of the Imperial Japanese Navy 1904–1945|year=1986|publisher=Conway Maritime Press|location=London|isbn=0-85177-396-6|name-list-style=amp}}
- {{cite book|title=Conway's All the World's Fighting Ships 1922–1946|editor1-last=Chesneau|editor1-first=Roger|publisher=Conway Maritime Press|location=Greenwich, UK|year=1980|isbn=0-85177-146-7}}
- {{cite book|last=Hashimoto|first=Mochitsura|others=Colegrave, E.H.M. (translator)|title=Sunk: The Story of the Japanese Submarine Fleet 1942 – 1945|publisher=Cassell and Company|location=London|year=1954|id=ASIN B000QSM3L0}}
- {{cite book|last=Stille|first=Mark|title=Imperial Japanese Navy Submarines 1941-45| series =New Vanguard|volume=135|year=2007|publisher=Osprey Publishing|location=Botley, Oxford, UK|isbn=978-1-84603-090-1}}
{{Type A submarine}}