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Junsen type submarine

{{Infobox ship begin}}

{{Infobox ship class overview

|Name=Junsen type submarines

|Builders=*Kure Naval Arsenal

|Operators={{navy|Empire of Japan}}

|Class before=

|Class after=*Type A submarine

|Subclasses=*Junsen I (I-1 class)

  • Junsen I Modified (I-5 class)
  • Junsen II (I-6 class)
  • Junsen III (I-7 class)

|Cost=

|Built range=1923-1938

|In service range=

|In commission range=1926-1945

|Total ships building=

|Total ships planned=

|Total ships completed=

|Total ships cancelled=

|Total ships active=

|Total ships laid up=

|Total ships lost=

|Total ships retired=

|Total ships preserved=

}}

The {{nihongo|Junsen type submarine|巡潜型潜水艦, "巡洋潜水艦"|Junsen-gata sensuikan, "Cruiser submarine"}} was a ship class of submarines of the Imperial Japanese Navy (IJN). There were four submarine designs of the Junsen type: J1, a modified J1, J2 and the J3.

Class variants

The Junsen type submarines were divided into four classes:

  • {{nihongo|Junsen I |巡潜一型（伊一型）|Junsen 1-gata, I-1-class}}
  • {{nihongo|Junsen I Mod.|巡潜一型改（伊五型）|Junsen 1-gata Kai, I-5-class}}
  • {{nihongo|Junsen II|巡潜二型（伊六型）|Junsen 2-gata, I-6-class}}
  • {{nihongo|Junsen III|巡潜三型（伊七型）|Junsen 3-gata, I-7-class}}.

=Junsen I (''I-1'' class)=

{{main article|Type J1 submarine}}

File:Japanese submarine I-1.jpg

Four boats were built in 1923-1929. Genealogy of the large-size submarine in the IJN began with {{SMU|U-142||2}}. Japan received six U-boats from Germany as reparations of World War I. The IJN copied {{SMU|U-125||2}}, one of the six, producing the I-21-class minelayer submarine. The IJN could not find an optimal design of fleet submarine, so they and Kawasaki Heavy Industries sent many technical officers to the United Kingdom and Germany and got drawings of advanced submarines. The British L class became the Kaidai I, the K class became the Kaidai II and U-142 become Junsen I.

class="wikitable"

| width="3%" | Boat

| width="10%" | Builder

| width="5%" | Laid down

| width="5%" | Launched

| width="5%" | Completed

| width="25%" | Results

| width="20%" | Fate

{{ship|Japanese submarine|I-12}} {{nihongo|伊号第1潜水艦|I-Gō Dai-1 Sensuikan}}. The same shall apply hereinafter.

| Kawasaki Shipbuilding

| 12-03-1923

| 15-10-1924

| 10-03-1926

| Damaged {{ship|USS|Hulbert|DD-342|6}} 31-12-1941
Sank Dutch merchant ship Siantar 03-03-1942

| Sunk by {{ship|HMNZS|Moa|T233|6}} and {{ship|HMNZS|Kiwi|T102|6}} at Guadalcanal 29-01-1943.

{{ship|Japanese submarine|I-22}}

| Kawasaki Shipbuilding

| 06-08-1923

| 23-02-1925

| 24-07-1926

| Sank Dutch merchant ship Parigi 01-03-1942
Sank RMS Chilka 11-03-1942

| Sunk by {{ship|USS|Saufley|DD-465|6}} north of Rabaul {{coord|02|17|S|149|14|E}} 07-04-1944.

{{ship|Japanese submarine|I-32}}

| Kawasaki Shipbuilding

| 01-11-1924

| 08-06-1925

| 30-11-1926

| Sank RMS Elmdale 07-04-1942
Sank RMS Fultala 08-04-1942

| Sunk by USS PT-59 at Kamimbo 09-12-1942.

{{ship|Japanese submarine|I-42}}

| Kawasaki Shipbuilding

| 17-04-1926

| 22-05-1928

| 24-12-1929

| Sank Norwegian merchant ship Hoegh Merchant 14-12-1941
Sank Dutch merchant ship Ban Ho Guan 28-02-1942
Sank USS Washingtonian 06-04-1942
Damaged unknown sailing boat 10-04-1942
Damaged {{ship|USS|Alhena|AKA-9|6}} 27-09-1942

| Sunk by {{ship|USS|Seadragon|SS-194|6}} southeast of Rabaul {{coord|05|02|S|152|33|E}} 20-12-1942.

=Junsen I Mod (''I-5'' class) =

File:Japanese submarine I-5 in 1932.jpg

This is a type which added a floatplane to the Junsen I.

class="wikitable"

| width="3%" | Boat

| width="10%" | Builder

| width="5%" | Laid down

| width="5%" | Launched

| width="5%" | Completed

| width="25%" | Results

| width="20%" | Fate

{{ship|Japanese submarine|I-52}}

| Kawasaki Shipbuilding

| 30-10-1929

| 19-06-1931

| 31-07-1932

|

| Sunk by {{ship|USS|Wyman|DE-38|6}} east of Saipan {{coord|13|01|N|151|58|E}} 19-07-1944.

=Junsen II (''I-6'' class) <!-- [[Type J2 submarine]] points here--> =

File:Japanese submarine I-6 in 1935.jpg

Project number S32. This is a type which added a catapult to the Junsen I Mod. She was built in 1931 under the 1st Naval Armaments Supplement Programme (Maru 1).

class="wikitable"

! width="3%" | Boat

! width="10%" |Builder

! width="5%" | Laid down

! width="5%" | Launched

! width="5%" | Completed

! width="25%" | Results

! width="20%" | Fate

{{ship|Japanese submarine|I-62}}

| Kawasaki-Kōbe Shipyard

| 14 October 1932

| 31 March 1934

| 15 May 1935

| Damaged aircraft carrier {{ship|USS|Saratoga|CV-3|6}} 11 January 1942
Sank Clan Line cargo ship SS Clan Ross 2 April 1942
Sank RMS Bahadar 7 April 1942
Sank two unknown sailing boats 10 April 1942

| Accidentally rammed, attacked and sunk by Toyokawa Maru northeast of Hachijo-Shima on 16 June 1944.

=Junsen III (''I-7'' class)<!-- [[Type J3 submarine]] points here-->=

File:Japanese submarine I-7 in 1937.jpg

Project number S33. These boats combined the good points of the Junsen II and the Kaidai V. They were built in 1934 under the Maru 2 Programme.

Junsen III became a 'typeship' for the Type-A, B and C.

class="wikitable"

| width="3%" | Boat

| width="10%" | Builder

| width="5%" | Laid down

| width="5%" | Launched

| width="5%" | Completed

| width="25%" | Results

| width="20%" | Fate

{{ship|Japanese submarine|I-72}}

| Kure Naval Arsenal

| 12 September 1934

| 3 July 1935

| 31 March 1937

| Sank Dutch merchant ship Le Maire 04-03-1942
Sank RMS Glenshiel 03-04-1942
Sank USS Arcata 15-07-1942

| Damaged by {{ship|USS|Monaghan|DD-354|6}} at Kiska 21 June 1943. Scuttled 5 July 1943.

{{ship|Japanese submarine|I-82}}

| Kawasaki-Kōbe Shipyard

| 11-10-1934

| 20-07-1936

| 05-12-1938

| Sank Dutch merchant ship Tjisalak 26-03-1944
Sank RMS City of Adelaide 30-03-1944
Sank Australian merchant ship Nellore 29-06-1944
Sank USS Jean Nicolet 02-07-1944

| Sunk by {{ship|USS|Stockton|DD-646|6}} southeast of Okinawa Island {{coord|25|29|N|128|35|E}} 31-03-1945.

Characteristics

class="wikitable"

| width="15%" colspan="2"| Type

| width="16%" | Junsen I (I-1)

| width="16%" | Junsen I Mod. (I-5)

| width="16%" | Junsen II (I-6)

| width="16%" | Junsen III (I-7)

rowspan="2"|Displacement

| Surfaced

| {{convert|1970|LT|t|0}}

| rowspan="14"| same as Junsen I

| {{convert|1900|LT|t|0}}

| {{convert|2231|LT|t|0}}

Submerged

| {{convert|2791|LT|t|0}}

| {{convert|3061|LT|t|0}}

| {{convert|3583|LT|t|0}}

colspan="2"| Length (overall)

| {{convert|97.50|m|ftin|abbr=on}}

| {{convert|98.50|m|ftin|abbr=on}}

| {{convert|109.30|m|ftin|abbr=on}}

colspan="2"| Beam

| {{convert|9.22|m|ftin|abbr=on}}

| {{convert|9.06|m|ftin|abbr=on}}

| {{convert|9.10|m|ftin|abbr=on}}

colspan="2"| Draft

| {{convert|4.94|m|ftin|abbr=on}}

| {{convert|5.31|m|ftin|abbr=on}}

| {{convert|5.26|m|ftin|abbr=on}}

colspan="2"| Depth

| {{convert|7.58|m|ftin|abbr=on}}

| {{convert|7.58|m|ftin|abbr=on}}

| {{convert|7.70|m|ftin|abbr=on}}

colspan="2"| Power plant and shaft

| 2 × Rauschenbach Mk.2 diesels
2 shafts

| 2 × Kampon Mk.1A Model 7 diesels
2 shafts

| 2 × Kampon Mk.1A Model 10 diesels
2 shafts

rowspan="2"|Power

| Surfaced

| 6,000 bhp

| 8,000 bhp

| 11,200 bhp

Submerged

| 2,600 shp

| 2,600 shp

| 2,800 shp

rowspan="2"|Speed

| Surfaced

| {{convert|18.8|kn|km/h|lk=in}}

| {{convert|20.0|kn|km/h|lk=in}}

| {{convert|23.0|kn|km/h|lk=in}}

Submerged

| {{convert|8.1|kn|km/h|lk=in}}

| {{convert|7.5|kn|km/h|lk=in}}

| {{convert|8.0|kn|km/h|lk=in}}

rowspan="2"|Range

| Surfaced

| {{convert|24400|nmi|km|abbr=on|lk=in}} at {{convert|10|kn|km/h}}

| {{convert|20000|nmi|km|abbr=on|lk=in}} at {{convert|10|kn|km/h}}

| {{convert|14000|nmi|km|abbr=on|lk=in}} at {{convert|16|kn|km/h}}

Submerged

| {{convert|60|nmi|km|abbr=on|lk=in}} at {{convert|3|kn|km/h}}

| {{convert|65|nmi|km|abbr=on|lk=in}} at {{convert|3|kn|km/h}}

| {{convert|80|nmi|km|abbr=on|lk=in}} at {{convert|3|kn|km/h}}

colspan="2"| Test depth

| {{convert|75|m|ft|abbr=on}}

| {{convert|80|m|ft|abbr=on}}

| {{convert|100|m|ft|abbr=on}}

colspan="2"| Fuel

| 545 tons

| 580 tons

| 580 tons

| 800 tons

colspan="2"| Complement

| 75

| 75

| 80

| 100

colspan="2"| Armament (initial)

| • 6 × {{convert|533|mm|in|0|abbr=on}} torpedo tubes
(4 × bow, 2 × aft)
• 22 × Type 89 torpedoes
• 2 × {{convert|140|mm|in|abbr=on}} L/40 11th Year Type Naval gunsCampbell, John Naval Weapons of World War Two {{ISBN|0-87021-459-4}} p.191
• 1 × 7.7 mm machine gun

| • 6 × {{convert|533|mm|in|0|abbr=on}} torpedo tubes
(4 × bow, 2 × aft)
• 20 × Type 89 torpedoes
• 2 × {{convert|127|mm|in|abbr=on}} L/40 Type 88 AA guns
• 1 × 7.7 mm machine gun

| • 6 × {{convert|533|mm|in|0|abbr=on}} torpedo tubes
(4 × bow, 2 × aft)
• 17 × Type 89 torpedoes
• 1 × {{convert|127|mm|in|abbr=on}} L/40 Type 88 AA gun
• 1 × Hotchkiss M1929 machine gun AA gun

| • 6 × {{convert|533|mm|in|0|abbr=on}} torpedo tubes
(6 × bow)
• 20 × Type 89 torpedoes
• 2 × 140 mm L/40 11th Year Type Naval guns
• 2 × 13 mm AA guns

colspan="2"| Aircraft and facilities

|

| • Hangar
• 1 × Yokosuka E6Y1

| • Catapult and hangar
• 1 × Yokosuka E6Y1

| • Catapult and hangar
• 1 × Watanabe E9W1 Slim

Footnotes

{{reflist}}

Bibliography

  • {{cite web |url=http://rekigun.net/ |title=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}}
  • Model Art Extra No.537, Drawings of Imperial Japanese Naval Vessels Part-3, Model Art Co. Ltd. (Japan), May 1999, Book code 08734-5
  • The Maru Special, Japanese Naval Vessels No.31 Japanese Submarines I, Ushio Shobō (Japan), September 1979, Book code 68343-31

External links

{{Commons category|Junsen type submarine}}

{{Junsen type submarine}}

{{WWII Japanese ships}}

{{DEFAULTSORT:Junsen type submarine}}

Category:Submarine classes

Category:Submarines of the Imperial Japanese Navy