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Kaichū type submarine

From Wikipedia, the free encyclopedia
Class of WW2-era Japanese submarines
Class overview
NameKaichū type submarines
Builders
OperatorsImperial Japanese Navy
Subclasses
  • Kaichū I (Ro-11 class)
  • Kaichū II (Ro-13 class)
  • Kaichū III (Ro-16 class)
  • Kaichū IV (Ro-26 class)
  • Toku-Chū/Kaichū V (Ro-29 class)
  • Kaichū VI (Ro-33 class)
  • Sen-Chū/Kaichū VII (Ro-35 class)
Built1917-1944
In commission1919-1945

TheKaichū type submarine (海中型潜水艦,Kaichū-gata sensuikan) submarines were double-hulled medium-sized submarines of theImperial Japanese Navy duringWorld War II. The name was derived from theKaigun-shikiChū-gata Sensuikan (軍式型潜水艦,Navy Medium Type submarine).

Several variants existed. From 1934 to 1944, the K6 type (Ro-33 Class) and the K7 type (Senchū,Ro-35 Class) were built. They were equipped with a76.2 mm (3.00 in) L/40 gun and four 53 cmtorpedo tubes for tentype 95Long Lance torpedoes.

Most of these submarines were destroyed in combat, suffering from Alliedanti-submarine warfare measures, and onlyRo-50 survived the war.

Class variants

[edit]

TheKaichū type submarines were divided into seven classes:

  • Kaichū I (海中1型(呂一一型,Kaichū-ichi-gata,Ro-11-class)
  • Kaichū II (海中2型(呂一三型,Kaichū-ni-gata,Ro-13-class)
  • Kaichū III (海中3型(呂一六型,Kaichū-san-gata,Ro-16-class)
  • Kaichū IV (海中4型(呂二六型,Kaichū-yon-gata,Ro-26-class)
  • Toku-Chū/Kaichū V (特中型/海中5型(呂二九型,Toku-Chū-gata/Kaichū-go-gata,Ro-29-class)
  • Kaichū VI (海中6型(呂三三型,Kaichū-roku-gata,Ro-33-class)
  • Sen-Chū/Kaichū VII (潜中型/海中7型(呂三五型,Sen-Chū-gata/Kaichū-nana-gata,Ro-35-class)

Kaichū I (Ro-11 class)

[edit]
Ro-11 in 1919

Project numberS7. In 1910s, theImperial Japanese Navy (IJN) bought a license ofSchneider-Laubeuf design submarine. The IJN used the design as model and built theS Type (Schneider Type) submarine, theHa-9 andHa-10. TheKaichū I is the submarine which jumboized theS Type submarines.

  • Boats in class
BoatBuilderLaid downLaunchedCompletedFate
Submarine No. 19
Ro-11[1]
Kure Naval Arsenal25-04-191725-10-191731-07-1919 asSubmarine No. 19RenamedRo-11 01-11-1924. Decommissioned 01-04-1932.
Submarine No. 20
Ro-12
Kure Naval Arsenal25-04-191701-12-191718-09-1919 asSubmarine No. 20RenamedRo-12 01-11-1924. Decommissioned 01-04-1932.

Kaichū II (Ro-13 class)

[edit]
Ro-15 in 1920s

Project numberS18. TheKaichū II had an increased range compared with theKaichū I, and the turning torpedo tubes were removed.

  • Boats in class
BoatBuilderLaid downLaunchedCompletedFate
Submarine No. 23
Ro-13
Kure Naval Arsenal14-09-191826-08-191930-09-1920 asSubmarine No. 23RenamedRo-13 01-11-1924. Decommissioned 01-04-1932.
Submarine No. 22
Ro-14
Kure Naval Arsenal14-09-191831-03-191917-02-1921 asSubmarine No. 22RenamedRo-14 01-11-1924. Decommissioned 01-09-1933.
Submarine No. 24
Ro-15
Kure Naval Arsenal12-06-192014-10-192030-06-1921 asSubmarine No. 24RenamedRo-15 01-11-1924. Decommissioned 01-09-1933.

Kaichū III (Ro-16 class)

[edit]
Ro-16 in 1920s

Project numberS18. Their project number was the same as in theKaichū II type submarine, however their performance was improved.

  • Boats in class
BoatBuilderLaid downLaunchedCompletedFate
Submarine No. 37
Ro-16
Kure Naval Arsenal18-11-192022-04-192129-04-1922 asSubmarine No. 37RenamedRo-16 01-11-1924. Decommissioned 01-09-1933.
Submarine No. 34
Ro-17
Kure Naval Arsenal24-09-192024-02-192120-10-1921 asSubmarine No. 34RenamedRo-17 01-11-1924. Decommissioned 01-04-1936.
Submarine No. 35
Ro-18
Kure Naval Arsenal20-10-192025-03-192115-12-1921 asSubmarine No. 35RenamedRo-18 01-11-1924. Decommissioned 01-04-1936.
Submarine No. 36
Ro-19
Kure Naval Arsenal09-09-192028-12-192015-03-1922 asSubmarine No. 36RenamedRo-19 01-11-1924. Decommissioned 01-04-1936.
Submarine No. 38
Ro-20
Yokosuka Naval Arsenal28-07-191926-10-192001-02-1922 asSubmarine No. 38RenamedRo-20 01-11-1924. Decommissioned 01-04-1934.
Submarine No. 39
Ro-21
Yokosuka Naval Arsenal28-07-191926-10-192001-02-1922 asSubmarine No. 39RenamedRo-21 01-11-1924. Decommissioned 01-04-1934.
Submarine No. 40
Ro-22
Yokosuka Naval Arsenal22-01-192115-10-192110-10-1922 asSubmarine No. 40RenamedRo-22 01-11-1924. Decommissioned 01-04-1934.
Submarine No. 41
Ro-23
Yokosuka Naval Arsenal22-01-192115-10-192128-04-1923 asSubmarine No. 41RenamedRo-23 01-11-1924. Decommissioned 01-04-1935.
Submarine No. 42
Ro-24
Sasebo Naval Arsenal21-04-191908-12-191930-11-1920 asSubmarine No. 42RenamedRo-24 01-11-1924. Decommissioned 01-04-1935.
Submarine No. 43
Ro-25
Sasebo Naval Arsenal19-02-192017-07-192025-10-1921 asSubmarine No. 43RenamedRo-25 01-11-1924. Decommissioned 01-04-1936.

Kaichū IV (Ro-26 class)

[edit]
Ro-26 in 1923

Project numberS18A. Improved model from theKaichū III type.

  • Boats in class
BoatBuilderLaid downLaunchedCompletedFate
Submarine No. 45
Ro-26
Sasebo Naval Arsenal10-03-192118-10-192125-01-1923 asSubmarine No. 45RenamedRo-26 01-11-1924. Decommissioned 01-04-1940. Scrapped 1948. Her anchor is displaying atYokosuka Naval Base.
Submarine No. 58
Ro-27
Yokosuka Naval Arsenal16-07-192122-07-192231-07-1924 asSubmarine No. 58RenamedRo-27 01-11-1924. Decommissioned 01-04-1936. Scrapped 1948.
Submarine No. 62
Ro-28
Sasebo Naval Arsenal10-11-192113-04-192230-11-1923 asSubmarine No. 62RenamedRo-28 01-11-1924. Decommissioned 01-04-1940. Scrapped 1948.

Kaichū V (Toku-Chū, Ro-29 class)

[edit]
Ro-31 in 1935

Project numberS18B. They were built for thecommerce raiding role. The IJN official designation of these boats wasSpecial Purpose-Medium Type submarine (特中型潜水艦,Toku-Chū-gata sensuikan).

  • Boats in class
BoatBuilderLaid downLaunchedCompletedFate
Submarine No. 68
Ro-29
Kawasaki-Kōbe Shipyard02-06-192105-12-192215-09-1923 asSubmarine No. 68RenamedRo-29 01-11-1924. Decommissioned 01-04-1936.
Submarine No. 69
Ro-30
Kawasaki-Kōbe Shipyard27-06-192118-01-192329-04-1924 asSubmarine No. 69RenamedRo-30 01-11-1924. Decommissioned 01-04-1942. Scrapped 1945.
Submarine No. 70Kawasaki-Kōbe Shipyard25-09-192115-02-1923 asSubmarine No. 70Lost in an accident offAwaji Island 21-08-1923. Salvaged and scrapped October 1923. Her materials were used forRo-31.
Ro-31Kawasaki-Kōbe Shipyard20-12-192425-09-192610-05-1927Decommissioned 25-05-1945. Scuttled offSasebo 05-04-1946.
Submarine No. 71
Ro-32
Kawasaki-Kōbe Shipyard24-10-192119-03-192321-05-1924 asSubmarine No. 71RenamedRo-32 01-11-1924. Decommissioned 01-04-1942. Scrapped 1945.

Kaichū VI (Ro-33 class)

[edit]
Ro-33 in 1939

Project numberS30. They were planned as a prototype for a mass production submarines in the wartime under theMaru 1 Programme.

  • Boats in class
BoatBuilderLaid downLaunchedCompletedResultsFate
Ro-33Kure Naval Arsenal08-08-193310-10-193407-10-1935Sank Australian merchant shipMV Mamutu 07-08-1942Sunk byHMAS Arunta and RAF patrol aircraft offPort Moresby 29-08-1942.
Ro-34Mitsubishi-Kōbe Shipyard25-04-193412-12-193531-05-1937Sunk byUSS O'Bannon andUSS Strong nearRussell Islands 06-04-1943.

Kaichū VII (Sen-Chū, Ro-35 class)

[edit]
Ro-50 in 1944

Project numberS44. The final design in theKaichū series. They were equipped with a Freon air-conditioner, because the IJN took into consideration that they were to be active on the equator area too. The official IJN designation of these boats wasMedium Type submarine (中型潜水艦,Chū-gata sensuikan), also called for short,Medium Type (中型,Chū-gata) orSubmarine-Medium Type (潜中型,Sen-Chū-gata).
The IJN planned to build these boats under the following Naval Armaments Supplement Programmes:

However some of the boats were cancelled and their naval budgets, materials and staffs were transferred to theI-201 class submarines.

  • Boats in class
Boat No.BoatBuilderLaid downLaunchedCompletedResultsFate
201Ro-35Mitsubishi-Kōbe Shipyard09-10-194109-06-194225-03-1943Sunk byUSS Patterson near ofEspiritu Santo 25-08-1943.
202Ro-36Mitsubishi-Kōbe Shipyard07-03-194214-10-194227-05-1943Sunk byUSS Melvin north ofSaipan 13-06-1944.
203Ro-37Sasebo Naval Arsenal09-10-194130-06-194230-06-1943DamagedUSS Cache 22-01-1944Sunk byUSS Buchanan near ofSanta Cruz Islands11°47′S164°17′E / 11.783°S 164.283°E /-11.783; 164.283 22-01-1944.
204Ro-38Mitsubishi-Kōbe Shipyard20-06-194224-12-194224-07-1943Disappeared after 19-11-1943.
205Ro-39Mitsubishi-Kōbe Shipyard08-08-194206-03-194312-09-1943Sunk byUSS Charrette andUSS Fair east ofWotje Atoll06°48′N168°08′E / 6.800°N 168.133°E /6.800; 168.133 03-02-1944.
206Ro-40Mitsubishi-Kōbe Shipyard08-08-194206-03-194328-09-1943Sunk byUSS Phelps north ofMarshall Islands09°50′N166°35′E / 9.833°N 166.583°E /9.833; 166.583 16-02-1944.
207Ro-41Mitsubishi-Kōbe Shipyard06-10-194205-05-194326-11-1943SankUSS Shelton 03-10-1944Sunk byUSS Haggard south ofOkinawa22°57′N132°19′E / 22.950°N 132.317°E /22.950; 132.317 23-03-1945.
208Ro-42Sasebo Naval Arsenal27-04-194225-10-194231-08-1943Sunk byUSS Bangust northeast of Marshall Islands10°05′N168°22′E / 10.083°N 168.367°E /10.083; 168.367 10-06-1945.
209Ro-43Mitsubishi-Kōbe Shipyard06-10-194205-06-194316-12-1943DamagedUSS Renshaw 21-02-1945Sunk by aircraft fromUSS Anzio offIwo Jima25°07′N140°19′E / 25.117°N 140.317°E /25.117; 140.317 27-02-1945.
385Ro-44Mitsui-Tamano Shipyard14-02-194211-11-194213-09-1943Sunk byUSS Burden R. Hastings near ofEnewetak11°13′N164°15′E / 11.217°N 164.250°E /11.217; 164.250 16-06-1944.
386Ro-45Mitsubishi-Kōbe Shipyard20-10-194221-07-194311-01-1944Sunk byUSS Macdonough,USS Stephen Potter and aircraft fromUSS Monterey south ofTruk06°13′N151°19′E / 6.217°N 151.317°E /6.217; 151.317 01-05-1944.
387Ro-46Mitsui-Tamano Shipyard13-06-194223-04-194319-02-1944DamagedUSS Cavalier 29-01-1945Sunk by aircraft fromUSS Tulagi near ofOki Daitō24°15′N131°16′E / 24.250°N 131.267°E /24.250; 131.267 29-04-1945.
388Ro-47Mitsubishi-Kōbe Shipyard28-12-194220-08-194331-01-1944Sunk byUSS McCoy Reynolds northeast ofPalau09°19′N136°44′E / 9.317°N 136.733°E /9.317; 136.733 26-09-1944.
389Ro-48Mitsubishi-Kōbe Shipyard17-03-194315-10-194331-03-1944(1) Sunk byUSS William C. Miller northwest of Saipan 14-07-1944.
(2) Sunk byUSS Wyman northwest of Saipan 18-07-1944.
390Ro-49Mitsui-Tamano Shipyard16-11-194203-08-194319-05-1944Sunk byUSS Hudson.
391Ro-50Mitsui-Tamano Shipyard18-02-194327-11-194331-07-1944Sank USSLST-577 11-02-1945Decommissioned 30-11-1945. Sunk as target offGotō Islands 01-04-1946.
392 - 395Cancelled in 1943.
396Ro-55Mitsui-Tamano Shipyard05-08-194323-04-194430-09-1944Sunk byUSS Thomason west ofLuzon15°27′N119°25′E / 15.450°N 119.417°E /15.450; 119.417 07-02-1945.
640 - 644Cancelled in 1943.
645Ro-56
(ex-Ro-75)
Mitsui-Tamano Shipyard02-12-1943 asRo-7505-07-194415-11-1944Sunk byUSS Mertz andUSS Monssen near of Oki Daitō26°09′N130°21′E / 26.150°N 130.350°E /26.150; 130.350 09-04-1945.
646 - 654Cancelled in 1943.
5181 - 5223Cancelled in 1943.

Characteristics

[edit]
TypeKaichū I (Ro-11)Kaichū II (Ro-13)Kaichū III (Ro-16)Kaichū IV (Ro-26)
DisplacementSurfaced720 long tons (732 t)740 long tons (752 t)740 long tons (752 t)750 long tons (762 t)
Submerged1,000 long tons (1,016 t)1,003.1 long tons (1,019 t)997 long tons (1,013 t)1,080 long tons (1,097 t)
Length (overall)69.19 m (227 ft 0 in)70.10 m (230 ft 0 in)70.10 m (230 ft 0 in)74.22 m (243 ft 6 in)
Beam6.35 m (20 ft 10 in)6.10 m (20 ft 0 in)6.12 m (20 ft 1 in)6.12 m (20 ft 1 in)
Draft3.43 m (11 ft 3 in)3.68 m (12 ft 1 in)3.70 m (12 ft 2 in)3.73 m (12 ft 3 in)
Power plant and shaft2 ×Sulzer Mk.2 diesels
2 shafts
2 × Sulzer Mk.2 diesels
2 shafts
2 × Sulzer Mk.2 diesels
2 shafts
2 × Sulzer Mk.2 diesels
2 shafts
PowerSurfaced2,900 bhp2,900 bhp2,900 bhp2,900 bhp
Submerged1,200 shp1,200 shp1,200 shp1,200 shp
SpeedSurfaced18.2knots (33.7 km/h)16.5knots (30.6 km/h)16.5knots (30.6 km/h)16.0knots (29.6 km/h)
Submerged9.1knots (16.9 km/h)8.5knots (15.7 km/h)8.5knots (15.7 km/h)8.5knots (15.7 km/h)
RangeSurfaced4,000 nmi (7,400 km) at 10 knots (19 km/h)6,000 nmi (11,000 km) at 10 knots (19 km/h)6,000 nmi (11,000 km) at 10 knots (19 km/h)6,000 nmi (11,000 km) at 10 knots (19 km/h)
Submerged85 nmi (157 km) at 4 knots (7.4 km/h)85 nmi (157 km) at 4 knots (7.4 km/h)85 nmi (157 km) at 4 knots (7.4 km/h)85 nmi (157 km) at 4 knots (7.4 km/h)
Test depth30 m (98 ft)30 m (98 ft)45.7 m (150 ft)45.7 m (150 ft)
Fuel58.4 tons75 tons75 tons75 tons
Complement43434646
Armament (initial)• 6 × 450 mm (18 in)TTs
(4 × front, 2 × turret)
• 10 × Type 44 torpedoes
• 1 ×76.2 mm (3.00 in)L/23.5 5th Year Type AA gun
• 6 × 450 mm (18 in) TTs
(4 × front, 2 × upper deck)
• 10 × Type 44 torpedoes
• 1 × 76.2 mm (3.00 in) L/23.5 5th Year Type AA gun
• 6 × 450 mm (18 in) TTs
(4 × front, 2 × upper deck)
• 10 × Type 44 torpedoes
• 1 × 76.2 mm (3.00 in) L/23.5 5th Year Type AA gun
• 4 × 533 mm (21 in) TTs
(4 × front)
• 8 ×6th Year Type torpedoes
• 1 × 76.2 mm (3.00 in) L/23.5 5th Year Type AA gun
TypeKaichū V (Ro-29)Kaichū VI (Ro-33)Kaichū VII (Ro-35)
DisplacementSurfaced852 long tons (866 t)700 long tons (711 t)960 long tons (975 t)
Submerged1,030 long tons (1,047 t)1,200 long tons (1,219 t)1,447 long tons (1,470 t)
Length (overall)74.22 m (243 ft 6 in)73.00 m (239 ft 6 in)80.50 m (264 ft 1 in)
Beam6.12 m (20 ft 1 in)6.70 m (22 ft 0 in)7.05 m (23 ft 2 in)
Draft3.73 m (12 ft 3 in)3.25 m (10 ft 8 in)4.07 m (13 ft 4 in)
Power plant and shaft2 × Sulzer Mk.1 diesels
2 shafts
2 ×Kampon Mk.21 Model 8 diesels
2 shafts
2 × Kampon Mk.22 Model 10 diesels
2 shafts
PowerSurfaced1,200 bhp3,000 bhp4,200 bhp
Submerged1,200 shp1,200 shp1,200 shp
SpeedSurfaced13.0knots (24.1 km/h)19.0knots (35.2 km/h)19.8knots (36.7 km/h)
Submerged8.5knots (15.7 km/h)8.2knots (15.2 km/h)8.0knots (14.8 km/h)
RangeSurfaced6,000 nmi (11,000 km) at 10 knots (19 km/h)8,000 nmi (15,000 km) at 12 knots (22 km/h)5,000 nmi (9,300 km) at 16 knots (30 km/h)
Submerged85 nmi (157 km) at 4 knots (7.4 km/h)90 nmi (170 km) at 3.5 knots (6.5 km/h)45 nmi (83 km) at 5 knots (9.3 km/h)
Test depth45.7 m (150 ft)75 m (246 ft)80 m (260 ft)
Fuel143 tons109 tons218 tons
Complement446161
Armament (initial)• 4 × 533 mm (21 in) TTs
(4 × front)
• 8 × 6th Year Type torpedoes
• 1 ×120 mm (4.7 in) L/45 11th Year Type Naval gun
• 1 × 6.5 mm machine gun
• 4 × 533 mm (21 in) TTs
(4 × front)
• 8 × Type 89 torpedoes
• 1 ×76.2 mm (3.00 in) L/40 11th Year Type AA gun
• 1 ×13.2 mm (0.52 in) Type 93 AA gun
• 4 × 533 mm (21 in) TTs
(4 × front)
• 10 ×Type 95 torpedoes
• 1 × 76.2 mm (3.00 in) L/40 11th Year Type AA gun
• 2 ×Type 96 25mm AA guns

Bibliography

[edit]
  • "Rekishi Gunzō"., History of Pacific War Vol.17 I-Gō Submarines,Gakken (Japan), January 1998,ISBN 4-05-601767-0
  • Rekishi Gunzō, History of Pacific War Extra, "Perfect guide, The submarines of the Imperial Japanese Forces", Gakken (Japan), March 2005,ISBN 4-05-603890-2
  • The Maru Special, Japanese Naval Vessels No.43 Japanese Submarines III, Ushio Shobō (Japan), September 1980, Book code 68343-44
  • The Maru Special, Japanese Naval Vessels No.132 Japanese Submarines I "Revised edition", Ushio Shobō (Japan), February 1988, Book code 68344-36
  • The Maru Special, Japanese Naval Vessels No.133 Japanese Submarines II "Revised edition", Ushio Shobō (Japan), March 1988, Book code 68344-37
  • The Maru Special, Japanese Naval Vessels No.135 Japanese Submarines IV, Ushio Shobō (Japan), May 1988, Book code 68344-39

References

[edit]
  1. ^呂号第11潜水艦 (Ro-Gō Dai-11 Sensuikan). The same shall apply hereinafter.
Ro-11-class (Type K1)
Ro-13-class (Type K2)
Ro-16-class (Type K3)
Ro-26-class (Type K4)
Ro-29-class (Toku-Chū/Type K5)
Ro-33-class (Type K6)
Ro-35-class (Sen-Chū/Type K7)
Japanese naval ship classes of World War I
Seaplane carriers
Dreadnoughtbattleships
Pre-dreadnought battleships
Battlecruisers
Armored cruisers
Light cruisers
Protected cruisers
Unprotected cruisers
Destroyers
Torpedo boats
Submarines
S
Single ship of class
L
Loaned from theRoyal Navy
C
Completed after the war
Aircraft carriers
Light aircraft carriers
Escort carriers
Battleships
Heavy cruisers
Armored cruisers
Light cruisers
Protected cruisers
Destroyers
1st class
Type Special
Type A
Type B
Type C
Type D
2nd class
Torpedo boats
Escort ships
(Kaibōkan)
Type A
Type B
Type C
Type D
Submarines
1st class
Kaidai Type
Junsen Type
Junsen Type A
Junsen Type B
Junsen Type C
Type D/Sen'yu
2nd class
Kaichū Type
Type L
Midget
Submarine tenders
Seaplane tenders
Gunboats
Ocean
River
Small craft
Escort carriers
Landing craft carriers
Type C
M Type C
Type A
M Type A
Type B
Submarines
Small craft
S: Single ship in classC: Converted to ship typeL: Officially classed as light cruisers until 1939 refitsI: Incomplete until the end of the warX: Cancelled
Japanese transcription:class/type (,"Gata"),(re)model/mark (,"Kai"),A (,"Kō"),B (,"Otsu"),C (,"Hei"),D (,"Tei")
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