Difference between revisions of "Type K-8 No.13"
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+ | {{About | ||
+ | | about = Japanese sub-chaser '''{{PAGENAME}}''' | ||
+ | | usage = the other version | ||
+ | | link = Type K-8 No.13 late | ||
+ | }} | ||
{{Specs-Card | {{Specs-Card | ||
|code=jp_kusen_tei_13_1942 | |code=jp_kusen_tei_13_1942 | ||
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== Description == | == Description == | ||
<!-- ''In the first part of the description, cover the history of the ship's creation and military application. In the second part, tell the reader about using this ship in the game. Add a screenshot: if a beginner player has a hard time remembering vehicles by name, a picture will help them identify the ship in question.'' --> | <!-- ''In the first part of the description, cover the history of the ship's creation and military application. In the second part, tell the reader about using this ship in the game. Add a screenshot: if a beginner player has a hard time remembering vehicles by name, a picture will help them identify the ship in question.'' --> | ||
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The '''{{Specs|name}}''' is a premium gift rank {{Specs|rank}} Japanese sub-chaser {{Battle-rating}}. It was introduced during [[Update "Hot Tracks"]] as a reward for the [[wt:en/news/6981-special-operation-w-i-n-t-e-r-en|2020 Operation W.I.N.T.E.R.]] event. | The '''{{Specs|name}}''' is a premium gift rank {{Specs|rank}} Japanese sub-chaser {{Battle-rating}}. It was introduced during [[Update "Hot Tracks"]] as a reward for the [[wt:en/news/6981-special-operation-w-i-n-t-e-r-en|2020 Operation W.I.N.T.E.R.]] event. | ||
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=== Survivability and armour === | === Survivability and armour === | ||
{{Specs-Fleet-Armour}} | {{Specs-Fleet-Armour}} | ||
+ | <!-- ''Talk about the vehicle's armour. Note the most well-defended and most vulnerable zones, e.g. the ammo magazine. Evaluate the composition of components and assemblies responsible for movement and manoeuvrability. Evaluate the survivability of the primary and secondary armaments separately. Don't forget to mention the size of the crew, which plays an important role in fleet mechanics. Save tips on preserving survivability for the "Usage in battles" section. If necessary, use a graphical template to show the most well-protected or most vulnerable points in the armour.'' --> | ||
[[File:Type K-8 Survivability.jpg|thumb|left|Type K-8 can survive a few ships simultaneously creating a spectacle with all the shrapnel flying off.]] | [[File:Type K-8 Survivability.jpg|thumb|left|Type K-8 can survive a few ships simultaneously creating a spectacle with all the shrapnel flying off.]] | ||
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The {{specs|name}}'s primary characteristic is her exceptional survivability for the battle rating. With a crew count of {{specs|crew}}, she's got nearly the double of the second-best vessel, and nearly 7 times the crew count of any US vessel in this battle rating. She's also the only ship within the battle rating to have 7 hull sections, at least one more than all the other ships. Overall this gives her an outstanding ability to survive even a focused gun fire from multiple boats. | The {{specs|name}}'s primary characteristic is her exceptional survivability for the battle rating. With a crew count of {{specs|crew}}, she's got nearly the double of the second-best vessel, and nearly 7 times the crew count of any US vessel in this battle rating. She's also the only ship within the battle rating to have 7 hull sections, at least one more than all the other ships. Overall this gives her an outstanding ability to survive even a focused gun fire from multiple boats. | ||
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=== Mobility === | === Mobility === | ||
{{Specs-Fleet-Mobility}} | {{Specs-Fleet-Mobility}} | ||
− | <!--''Write about the | + | <!-- ''Write about the ship's mobility. Evaluate its power and manoeuvrability, rudder rerouting speed, stopping speed at full tilt, with its maximum forward and reverse speed.'' --> |
With the top speed of 33km/h, she's a relatively large, lumbering target. It's not helped by an average rudder turning speed of 4.85s. Overall it's an attractive target for a torpedo attacks and a long-range gunnery fire. | With the top speed of 33km/h, she's a relatively large, lumbering target. It's not helped by an average rudder turning speed of 4.85s. Overall it's an attractive target for a torpedo attacks and a long-range gunnery fire. | ||
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{{main|8 cm/40 Type 3 (76 mm)}} | {{main|8 cm/40 Type 3 (76 mm)}} | ||
− | The {{PAGENAME}}'s primary armament is a single 8 cm Type 3 cannon. It can fire up to 20 shots/minute of Type 0 HE shells that are relatively potent, with 480 g of TNT, being able to | + | The {{PAGENAME}}'s primary armament is a single 8 cm Type 3 cannon. It can fire up to 20 shots/minute of Type 0 HE shells that are relatively potent, with 480 g of TNT, being able to knock out individual hull sections on most boats she'll encounter, but struggling with larger units like submarine chasers. |
− | The gun was originally designed as a high-elevation one, historically being often mounted on a larger ships for anti-aircraft duty. As a result, her horizontal guidance is ±180° and vertical -7°/+75°, covering most of the field around the ship with exception of the deadzone behind the conning tower, although the gun can still engage airborne targets by firing above it. | + | The gun was originally designed as a high-elevation one, historically being often mounted on a larger ships for anti-aircraft duty. As a result, her horizontal guidance is ±180° and vertical -7°/+75°, covering most of the field around the ship with exception of the deadzone behind the conning tower, although the gun can still engage airborne targets by firing above it. Targeting speed is slow, just 9.4°/s, however it's sufficient to engage targets bar fast attack boats in an extremely short range where machine guns engage them anyway. |
{{Clear|left}} | {{Clear|left}} | ||
+ | |||
+ | {{:8 cm/40 3rd Year Type (76 mm)/Ammunition|8 cm Type 0 HE, 8 cm Type 0 HE-TF}} | ||
=== Secondary armament === | === Secondary armament === | ||
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{{main|Type 93 (13.2 mm)}} | {{main|Type 93 (13.2 mm)}} | ||
− | Unlike predecessors, this boat have separate anti-aircraft armament which consists from twin Type 93 (13.2 mm) machine guns on a single mount at the rear of the ship. It has a notable advantage in vertical guidance over the Type 96 automatic cannons, being able to aim at targets up to +80° vs +65° for the Type 96. Also having nearly double the fire rate further increases its chances of landing successful shots at the enemy. That said though, even with two bullets hitting the enemy, the overall damage is much lower, with 13.2 mm HEI bullet bearing 1g TNT, while | + | Unlike predecessors, this boat have separate anti-aircraft armament which consists from twin Type 93 (13.2 mm) machine guns on a single mount at the rear of the ship. It has a notable advantage in vertical guidance over the Type 96 automatic cannons, being able to aim at targets up to +80° vs +65° for the Type 96. Also having nearly double the fire rate further increases its chances of landing successful shots at the enemy. That said though, even with two bullets hitting the enemy, the overall damage is much lower, with 13.2 mm HEI bullet bearing 1g TNT, while 25 mm HEI bears 15.3 g TNT. |
− | The more familiar with the K-8 will realize that on the 1942 refit there are no 25 mm | + | The more familiar with the K-8 will realize that on the 1942 refit there are no 25 mm to be spotted unlike on the [[Type K-8 No.13 late]] which would only get the anti-air package late in the war. |
− | |||
− | + | * '''Universal:''' {{Annotation|T|Tracer}}{{-}}{{Annotation|AP|Armour-piercing}}{{-}}{{Annotation|IAI|Immediate-action incendiary}}{{-}}{{Annotation|AP|Armour-piercing}} | |
− | {{ | + | * '''AP-T:''' {{Annotation|AP|Armour-piercing}}{{-}}{{Annotation|AP|Armour-piercing}}{{-}}{{Annotation|AP|Armour-piercing}}{{-}}{{Annotation|T|Tracer}} |
− | + | * '''HEIT:''' {{Annotation|IAI|Immediate-action incendiary}}{{-}}{{Annotation|IAI|Immediate-action incendiary}}{{-}}{{Annotation|IAI|Immediate-action incendiary}}{{-}}{{Annotation|T|Tracer}} | |
− | {{ | ||
− | + | {{:Type 93 (13.2 mm)/Ammunition|AP, T, IAI}} | |
=== Additional armament === | === Additional armament === | ||
{{Specs-Fleet-Additional}} | {{Specs-Fleet-Additional}} | ||
− | ''Describe the available additional armaments of the ship: depth charges, mines, torpedoes. Talk about their positions, available ammunition and launch features such as dead zones of torpedoes.'' | + | <!-- ''Describe the available additional armaments of the ship: depth charges, mines, torpedoes. Talk about their positions, available ammunition and launch features such as dead zones of torpedoes. If there is no additional armament, remove this section.'' --> |
+ | {{main|Type 95 depth charge}} | ||
− | ''If there is no additional armament, remove this section.'' | + | ''Describe the available additional armaments of the ship: depth charges, mines, torpedoes. Talk about their positions, available ammunition and launch features such as dead zones of torpedoes. If there is no additional armament, remove this section.'' |
== Usage in battles == | == Usage in battles == | ||
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The primary role of the K-8 is to lure enemy's attention away from more vulnerable targets. Being large, intimidating ship it will often be under fire of a number of enemy units. And often times it can freely survive those engagements, largely thanks to its 8cm main gun packing powerful punch, although delivered at a low fire rate, and assisted by a number of secondaries at all angles. | The primary role of the K-8 is to lure enemy's attention away from more vulnerable targets. Being large, intimidating ship it will often be under fire of a number of enemy units. And often times it can freely survive those engagements, largely thanks to its 8cm main gun packing powerful punch, although delivered at a low fire rate, and assisted by a number of secondaries at all angles. | ||
− | With the benefit of being a whole | + | With the benefit of being a whole battle rating lower compared the 1944 refit, it has an easier time engaging targets and lighter targets to shoot at which will perish with most of the 8cm gun's hits. |
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=== Pros and cons === | === Pros and cons === | ||
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'''Cons:''' | '''Cons:''' | ||
− | * | + | * Sub-chaser |
− | ** Slow speed and low | + | ** Slow speed and low manoeuvrability |
** Large target | ** Large target | ||
* Single dedicated anti-air mount | * Single dedicated anti-air mount | ||
== History == | == History == | ||
− | <!--''Describe the history of the creation and combat usage of the ship in more detail than in the introduction. If the historical reference turns out to be too long, take it to a separate article, taking a link to the article about the | + | <!-- ''Describe the history of the creation and combat usage of the ship in more detail than in the introduction. If the historical reference turns out to be too long, take it to a separate article, taking a link to the article about the ship and adding a block "/History" (example: <nowiki>https://wiki.warthunder.com/(Ship-name)/History</nowiki>) and add a link to it here using the <code>main</code> template. Be sure to reference text and sources by using <code><nowiki><ref></ref></nowiki></code>, as well as adding them at the end of the article with <code><nowiki><references /></nowiki></code>. This section may also include the ship's dev blog entry (if applicable) and the in-game encyclopedia description (under <code><nowiki>=== In-game description ===</nowiki></code>, also if applicable).'' --> |
− | + | Submarine chasers of the project number K8, also known as the No.13-class submarine chasers (第十三号型駆潜艇, Dai 13 Gō-gata Kusentei), were built under Maru 4 Keikaku programme, totalling 15 ships built from 1940 till 1942. The primary principle of the design was to build capable ships quickly and cheaply. The resulting design used cheaper, more common steel found on merchant ships, not military units. But an additional reinforcements created a notably sturdier hull, which also helped avoiding secondary vibrations due to the sonar. Furthermore, the ship had an increased ballast, lowered centre of gravity and an increased hull width what resulted in a ship having displacement roughly 1.5 times the one of its predecessor, the [[Type K-7 No.4|No.4]]. | |
− | Submarine chasers of the project number K8, also known as the No.13-class submarine chasers (第十三号型駆潜艇, Dai 13 Gō-gata Kusentei), were built under Maru 4 Keikaku programme, totalling 15 ships built from 1940 till 1942. The primary principle of the design was to build capable ships quickly and cheaply. The resulting design used cheaper, more common steel found on merchant ships, not military units. But an additional reinforcements created a notably sturdier hull, which also helped avoiding secondary vibrations due to the sonar. Furthermore, the ship had an increased ballast, lowered centre of gravity and an increased hull width what resulted in a ship having displacement roughly 1.5 times the one of its predecessor, the [[Type K-7 | ||
===Ships of class=== | ===Ships of class=== | ||
+ | {{Sp-begin|Ships of class}} | ||
{| class="wikitable sortable" | {| class="wikitable sortable" | ||
! rowspan="2" data-sort-type="text" | Name | ! rowspan="2" data-sort-type="text" | Name | ||
Line 167: | Line 127: | ||
| 1941-03-31 | | 1941-03-31 | ||
| Survived | | Survived | ||
− | | | + | | |
− | | | + | | |
| 1948-04-23 | | 1948-04-23 | ||
|- | |- | ||
Line 176: | Line 136: | ||
| Aircraft | | Aircraft | ||
| 1944-07-04 | | 1944-07-04 | ||
− | | | + | | |
|- | |- | ||
| No. 17 | | No. 17 | ||
Line 183: | Line 143: | ||
| Submarine, USS Springer (SS-414) | | Submarine, USS Springer (SS-414) | ||
| 1945-04-28 | | 1945-04-28 | ||
− | | | + | | |
|- | |- | ||
| No. 18 | | No. 18 | ||
Line 190: | Line 150: | ||
| Aircraft | | Aircraft | ||
| 1944-12-30 | | 1944-12-30 | ||
− | | | + | | |
|- | |- | ||
| No. 19 | | No. 19 | ||
| 1941-09-20 | | 1941-09-20 | ||
| Survived | | Survived | ||
− | | | + | | |
− | | | + | | |
| 1948 | | 1948 | ||
|- | |- | ||
Line 202: | Line 162: | ||
| 1941-08-20 | | 1941-08-20 | ||
| Survived | | Survived | ||
− | | | + | | |
− | | | + | | |
| 1948-05-04 | | 1948-05-04 | ||
|- | |- | ||
Line 209: | Line 169: | ||
| 1941-08-20 | | 1941-08-20 | ||
| Survived | | Survived | ||
− | | | + | | |
− | | | + | | |
| 1947 | | 1947 | ||
|- | |- | ||
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| Aircraft | | Aircraft | ||
| 1944-02-19 | | 1944-02-19 | ||
− | | | + | | |
|- | |- | ||
| No. 23 | | No. 23 | ||
| 1941-11-15 | | 1941-11-15 | ||
| Survived | | Survived | ||
− | | | + | | |
− | | | + | | |
| 1948 | | 1948 | ||
|- | |- | ||
Line 232: | Line 192: | ||
| Destroyer, USS Burns (DD-588) | | Destroyer, USS Burns (DD-588) | ||
| 1944-02-17 | | 1944-02-17 | ||
− | | | + | | |
|- | |- | ||
| No. 25 | | No. 25 | ||
Line 239: | Line 199: | ||
| Submarine, USS Grunion (SS-216) | | Submarine, USS Grunion (SS-216) | ||
| 1942-07-15 | | 1942-07-15 | ||
− | | | + | | |
|- | |- | ||
| No. 26 | | No. 26 | ||
Line 246: | Line 206: | ||
| Aircraft | | Aircraft | ||
| 1945-07-30 | | 1945-07-30 | ||
− | | | + | | |
|- | |- | ||
| No. 27 | | No. 27 | ||
Line 253: | Line 213: | ||
| Submarine, USS Grunion | | Submarine, USS Grunion | ||
| 1942-07-16 | | 1942-07-16 | ||
− | | | + | | |
|} | |} | ||
+ | {{Sp-end}} | ||
− | + | No. 13 and No. 13 took part in a hunt for USS Nautilus (SS-168) in June 1942, damaging the submarine with depth charges and forcing it back to Pearl Harbor for month-long repairs. The No. 27 was likely the last victim of the USS Grunion, before the latter was sunk 4 days later. No. 18 sunk USS Amberjack (SS-219) on 16 February 1943. In October 1943, No. 15 took part in the sinking of submarine USS Wahoo (SS-238). On 14 November 1943, the No. 20 engaged in a gunnery duel with the HMS Taurus (P399), with the submarine hitting the bridge of the chaser with its QF 4-inch Mk IV (102 mm) gun, killing the captain and most of the crew onboard. The ship suffers a number of other hits that eventually flood her engine room forcing the ship to be towed back into the port for repairs. The submarine returned back to the port undamaged, despite No. 20's crew claiming a direct hull hit and dropping a number of depth charges. | |
− | 08 August 1945 marks the most successful anti-aircraft duty of the class, with the | + | 08 August 1945 marks the most successful anti-aircraft duty of the class, with the No. 19 damaging six out of fourteen [[B-25 (Family)|B-25]] bombers trying to strafe it in the Tsushima Strait between Japan and South Korea. The ship suffered one bomb hit, but survives the encounter and returns back to the Kure port, about 20 km away from Hiroshima just days after the atomic bombing. |
− | Ships of the class also participated in a number of rescue operations, such as | + | Ships of the class also participated in a number of rescue operations, such as No. 17 and No. 18 rescuing of nearly 400 survivors of the bombing of a Naples Maru troop transport or No. 20 rescuing 622 survivors after an attack on a convoy departing from the Musa Bay in the September 1944. |
===22-GO Radar=== | ===22-GO Radar=== | ||
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The two rotating devices on top of the conning tower of the Type K-8 are not acoustic listening devices, but rather a radar. Each of the two devices are built of a dipole antenna inside a large, cone-like horn antenna. Its designation is 22-GO (22号電探), also known as Navy Mark 2 Type 2 Radar. Colloquially it was called "Horns" among Americans and "Tuna" among Japanese sailors. | The two rotating devices on top of the conning tower of the Type K-8 are not acoustic listening devices, but rather a radar. Each of the two devices are built of a dipole antenna inside a large, cone-like horn antenna. Its designation is 22-GO (22号電探), also known as Navy Mark 2 Type 2 Radar. Colloquially it was called "Horns" among Americans and "Tuna" among Japanese sailors. | ||
− | It was designed as a search radar. First test phase was done onboard battleship Hyūga in May 1942, with further testing proceeding onboard Yamato in July 1943. It went through a number of updates, eventually reaching nearly | + | It was designed as a search radar. First test phase was done onboard battleship Hyūga in May 1942, with further testing proceeding onboard Yamato in July 1943. It went through a number of updates, eventually reaching nearly 1,000 units produced by the end of the war. The mass deployment begin in July 1944, eventually reaching most of the Japanese naval units. After the war, radars found their use onboard whaling vessels helping to mitigate the food shortage in the post-war period by ensuring a safe passage of the vessels between the icebergs in the northern seas. |
The radar suffered from relatively low accuracy, making it not suitable for fire-control applications. It had an average range error of 160 metres and an average bearing error of 2.26°. It was able to detect battleships at 35 km range, destroyers at 16 km and submarines at 5 km. Testing onboard Yamato also proved that the radar can detect a water column from Yamato's 155 mm secondary cannons from up to 15 km. | The radar suffered from relatively low accuracy, making it not suitable for fire-control applications. It had an average range error of 160 metres and an average bearing error of 2.26°. It was able to detect battleships at 35 km range, destroyers at 16 km and submarines at 5 km. Testing onboard Yamato also proved that the radar can detect a water column from Yamato's 155 mm secondary cannons from up to 15 km. | ||
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== Media == | == Media == | ||
<!-- ''Excellent additions to the article would be video guides, screenshots from the game, and photos.'' --> | <!-- ''Excellent additions to the article would be video guides, screenshots from the game, and photos.'' --> | ||
+ | |||
+ | ;Skins | ||
+ | * [https://live.warthunder.com/feed/camouflages/?vehicle=jp_kusen_tei_13_1942 Skins and camouflages for the {{PAGENAME}} from live.warthunder.com.] | ||
+ | |||
+ | ;Images | ||
<gallery mode="packed" caption="Type K-8 (1942) Devblog Images" heights="150"> | <gallery mode="packed" caption="Type K-8 (1942) Devblog Images" heights="150"> | ||
File:Type K-8 Class No.13 Kusentei (1942) WTWallpaper 001.jpg| | File:Type K-8 Class No.13 Kusentei (1942) WTWallpaper 001.jpg| | ||
Line 280: | Line 246: | ||
File:Type K-8 Class No.13 Kusentei (1942) WTWallpaper 004.jpg| | File:Type K-8 Class No.13 Kusentei (1942) WTWallpaper 004.jpg| | ||
</gallery> | </gallery> | ||
+ | |||
+ | ;Videos | ||
+ | {{Youtube-gallery|lqrwrKn2TX0|'''Type K-8 1942 - Event Flipped Review''' - ''Flipped StuG''}} | ||
== See also == | == See also == | ||
− | <!--Links to articles on the War Thunder Wiki that you think will be useful for the reader, for example: | + | <!-- ''Links to articles on the War Thunder Wiki that you think will be useful for the reader, for example:'' |
* ''reference to the series of the ship;'' | * ''reference to the series of the ship;'' | ||
− | * ''links to approximate analogues of other nations and research trees.''--> | + | * ''links to approximate analogues of other nations and research trees.'' --> |
Ships of comparable role, configuration and era | Ships of comparable role, configuration and era | ||
− | * [[Type K-7 | + | * [[Type K-7 No.4]] (predecessor) |
− | * [[Pr.191M]] (comparable USSR | + | * [[Pr.191M]] (comparable USSR armoured gun boat) |
== External links == | == External links == | ||
Line 298: | Line 267: | ||
* [[wikipedia:No.13-class_submarine_chaser|[Wikipedia] No.13-class submarine chaser]] | * [[wikipedia:No.13-class_submarine_chaser|[Wikipedia] No.13-class submarine chaser]] | ||
+ | {{ShipManufacturer Nippon Kokan Co.}} | ||
{{Japan sub-chasers}} | {{Japan sub-chasers}} | ||
{{Japan premium ships}} | {{Japan premium ships}} | ||
+ | {{Winter Event}} |
Latest revision as of 12:36, 23 August 2023
This page is about the Japanese sub-chaser Type K-8 No.13. For the other version, see Type K-8 No.13 late. |
Contents
Description
The Type K-8 No.13, Kusentei is a premium gift rank II Japanese sub-chaser with a battle rating of 2.0 (AB/RB/SB). It was introduced during Update "Hot Tracks" as a reward for the 2020 Operation W.I.N.T.E.R. event.
General info
Survivability and armour
The Type K-8 No.13, Kusentei's primary characteristic is her exceptional survivability for the battle rating. With a crew count of 68, she's got nearly the double of the second-best vessel, and nearly 7 times the crew count of any US vessel in this battle rating. She's also the only ship within the battle rating to have 7 hull sections, at least one more than all the other ships. Overall this gives her an outstanding ability to survive even a focused gun fire from multiple boats.
That said though - the Type K-8 No.13 has some weak points to her survivability. First of all, she has one of the thinnest armour layers, making it impossible to deflect even the lowest calibre guns at nearly any range. Secondly her primary gun is fully exposed, leading to it being often disabled under enemy fire. And lastly her ammunition storage is exposed fully over the water level, directly under the primary gun, making for a significant chances of ammo-racking the ship.
Mobility
With the top speed of 33km/h, she's a relatively large, lumbering target. It's not helped by an average rudder turning speed of 4.85s. Overall it's an attractive target for a torpedo attacks and a long-range gunnery fire.
Mobility Characteristics | |||
---|---|---|---|
Game Mode | Upgrade Status | Maximum Speed (km/h) | |
Forward | Reverse | ||
AB | |||
Upgraded | 45 | 16 | |
RB/SB | |||
Upgraded | 30 | 11 |
Modifications and economy
Armament
Primary armament
The Type K-8 No.13's primary armament is a single 8 cm Type 3 cannon. It can fire up to 20 shots/minute of Type 0 HE shells that are relatively potent, with 480 g of TNT, being able to knock out individual hull sections on most boats she'll encounter, but struggling with larger units like submarine chasers.
The gun was originally designed as a high-elevation one, historically being often mounted on a larger ships for anti-aircraft duty. As a result, her horizontal guidance is ±180° and vertical -7°/+75°, covering most of the field around the ship with exception of the deadzone behind the conning tower, although the gun can still engage airborne targets by firing above it. Targeting speed is slow, just 9.4°/s, however it's sufficient to engage targets bar fast attack boats in an extremely short range where machine guns engage them anyway.
Penetration statistics | |||||||
---|---|---|---|---|---|---|---|
Ammunition | Type of warhead |
Penetration @ 0° Angle of Attack (mm) | |||||
100 m | 1,000 m | 2,000 m | 3,000 m | 4,000 m | 5,000 m | ||
Type 0 HE | HE | 8 | 8 | 8 | 8 | 8 | 8 |
Type 0 HE | HE-TF | 8 | 8 | 8 | 8 | 8 | 8 |
Shell details | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Ammunition | Type of warhead |
Velocity (m/s) |
Projectile mass (kg) |
Fuse delay (m) |
Fuse sensitivity (mm) |
Explosive mass (TNT equivalent) (g) |
Ricochet | |||||
0% | 50% | 100% | ||||||||||
Type 0 HE | HE | 685 | 5.99 | 0 | 0.1 | 480 | 79° | 80° | 81° | |||
Type 0 HE | HE-TF | 685 | 5.99 | 0 | 0.1 | 480 | 79° | 80° | 81° |
Secondary armament
Unlike predecessors, this boat have separate anti-aircraft armament which consists from twin Type 93 (13.2 mm) machine guns on a single mount at the rear of the ship. It has a notable advantage in vertical guidance over the Type 96 automatic cannons, being able to aim at targets up to +80° vs +65° for the Type 96. Also having nearly double the fire rate further increases its chances of landing successful shots at the enemy. That said though, even with two bullets hitting the enemy, the overall damage is much lower, with 13.2 mm HEI bullet bearing 1g TNT, while 25 mm HEI bears 15.3 g TNT.
The more familiar with the K-8 will realize that on the 1942 refit there are no 25 mm to be spotted unlike on the Type K-8 No.13 late which would only get the anti-air package late in the war.
- Universal: T · AP · IAI · AP
- AP-T: AP · AP · AP · T
- HEIT: IAI · IAI · IAI · T
Penetration statistics | |||||||
---|---|---|---|---|---|---|---|
Ammunition | Penetration @ 0° Angle of Attack (mm) | ||||||
10 m | 100 m | 500 m | 1,000 m | 1,500 m | 2,000 m | ||
AP | 28 | 27 | 24 | 20 | 17 | 14 | |
T | 25 | 24 | 21 | 17 | 14 | 11 | |
IAI | 3 | 2 | 2 | 2 | 2 | 2 |
Shell details | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Ammunition | Velocity (m/s) |
Projectile mass (kg) |
Fuse delay (m) |
Fuse sensitivity (mm) |
Explosive mass (TNT equivalent) (g) |
Ricochet | ||||||
0% | 50% | 100% | ||||||||||
AP | 805 | 0.05 | - | - | - | 47° | 56° | 65° | ||||
T | 805 | 0.04 | - | - | - | 47° | 56° | 65° | ||||
IAI | 805 | 0.04 | 0 | 0.1 | 1.7 | 47° | 56° | 65° |
Additional armament
Describe the available additional armaments of the ship: depth charges, mines, torpedoes. Talk about their positions, available ammunition and launch features such as dead zones of torpedoes. If there is no additional armament, remove this section.
Usage in battles
The primary role of the K-8 is to lure enemy's attention away from more vulnerable targets. Being large, intimidating ship it will often be under fire of a number of enemy units. And often times it can freely survive those engagements, largely thanks to its 8cm main gun packing powerful punch, although delivered at a low fire rate, and assisted by a number of secondaries at all angles.
With the benefit of being a whole battle rating lower compared the 1944 refit, it has an easier time engaging targets and lighter targets to shoot at which will perish with most of the 8cm gun's hits.
Pros and cons
Pros:
- Excellent survivability
- Good armament
- 360° weapon coverage
- Main gun able to engage aircraft
Cons:
- Sub-chaser
- Slow speed and low manoeuvrability
- Large target
- Single dedicated anti-air mount
History
Submarine chasers of the project number K8, also known as the No.13-class submarine chasers (第十三号型駆潜艇, Dai 13 Gō-gata Kusentei), were built under Maru 4 Keikaku programme, totalling 15 ships built from 1940 till 1942. The primary principle of the design was to build capable ships quickly and cheaply. The resulting design used cheaper, more common steel found on merchant ships, not military units. But an additional reinforcements created a notably sturdier hull, which also helped avoiding secondary vibrations due to the sonar. Furthermore, the ship had an increased ballast, lowered centre of gravity and an increased hull width what resulted in a ship having displacement roughly 1.5 times the one of its predecessor, the No.4.
Ships of class
Name | Completed | Fate at the end of the war | Dismantled post-war | ||
---|---|---|---|---|---|
Status | By | Date | |||
No. 13 | 1940-07-15 | Sunk | Submarine, USS Pickerel (SS-177) | 1943-04-03 | |
No. 14 | 1941-03-31 | Destroyed | Aircraft | 1945-07-28 | |
No. 15 | 1941-03-31 | Survived | 1948-04-23 | ||
No. 16 | 1941-04-05 | Sunk | Aircraft | 1944-07-04 | |
No. 17 | 1941-07-31 | Sunk | Submarine, USS Springer (SS-414) | 1945-04-28 | |
No. 18 | 1941-07-31 | Sunk | Aircraft | 1944-12-30 | |
No. 19 | 1941-09-20 | Survived | 1948 | ||
No. 20 | 1941-08-20 | Survived | 1948-05-04 | ||
No. 21 | 1941-08-20 | Survived | 1947 | ||
No. 22 | 1941-10-12 | Sunk | Aircraft | 1944-02-19 | |
No. 23 | 1941-11-15 | Survived | 1948 | ||
No. 24 | 1941-12-20 | Sunk | Destroyer, USS Burns (DD-588) | 1944-02-17 | |
No. 25 | 1941-12-29 | Sunk | Submarine, USS Grunion (SS-216) | 1942-07-15 | |
No. 26 | 1941-12-20 | Sunk | Aircraft | 1945-07-30 | |
No. 27 | 1942-01-28 | Sunk | Submarine, USS Grunion | 1942-07-16 |
No. 13 and No. 13 took part in a hunt for USS Nautilus (SS-168) in June 1942, damaging the submarine with depth charges and forcing it back to Pearl Harbor for month-long repairs. The No. 27 was likely the last victim of the USS Grunion, before the latter was sunk 4 days later. No. 18 sunk USS Amberjack (SS-219) on 16 February 1943. In October 1943, No. 15 took part in the sinking of submarine USS Wahoo (SS-238). On 14 November 1943, the No. 20 engaged in a gunnery duel with the HMS Taurus (P399), with the submarine hitting the bridge of the chaser with its QF 4-inch Mk IV (102 mm) gun, killing the captain and most of the crew onboard. The ship suffers a number of other hits that eventually flood her engine room forcing the ship to be towed back into the port for repairs. The submarine returned back to the port undamaged, despite No. 20's crew claiming a direct hull hit and dropping a number of depth charges.
08 August 1945 marks the most successful anti-aircraft duty of the class, with the No. 19 damaging six out of fourteen B-25 bombers trying to strafe it in the Tsushima Strait between Japan and South Korea. The ship suffered one bomb hit, but survives the encounter and returns back to the Kure port, about 20 km away from Hiroshima just days after the atomic bombing.
Ships of the class also participated in a number of rescue operations, such as No. 17 and No. 18 rescuing of nearly 400 survivors of the bombing of a Naples Maru troop transport or No. 20 rescuing 622 survivors after an attack on a convoy departing from the Musa Bay in the September 1944.
22-GO Radar
The two rotating devices on top of the conning tower of the Type K-8 are not acoustic listening devices, but rather a radar. Each of the two devices are built of a dipole antenna inside a large, cone-like horn antenna. Its designation is 22-GO (22号電探), also known as Navy Mark 2 Type 2 Radar. Colloquially it was called "Horns" among Americans and "Tuna" among Japanese sailors.
It was designed as a search radar. First test phase was done onboard battleship Hyūga in May 1942, with further testing proceeding onboard Yamato in July 1943. It went through a number of updates, eventually reaching nearly 1,000 units produced by the end of the war. The mass deployment begin in July 1944, eventually reaching most of the Japanese naval units. After the war, radars found their use onboard whaling vessels helping to mitigate the food shortage in the post-war period by ensuring a safe passage of the vessels between the icebergs in the northern seas.
The radar suffered from relatively low accuracy, making it not suitable for fire-control applications. It had an average range error of 160 metres and an average bearing error of 2.26°. It was able to detect battleships at 35 km range, destroyers at 16 km and submarines at 5 km. Testing onboard Yamato also proved that the radar can detect a water column from Yamato's 155 mm secondary cannons from up to 15 km.
Media
- Skins
- Images
- Videos
See also
Ships of comparable role, configuration and era
- Type K-7 No.4 (predecessor)
- Pr.191M (comparable USSR armoured gun boat)
External links
Nippon Kokan Co. (日本鋼管株式会社) | |
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Sub Chasers (駆潜艇) | |
No.13 Type | Type K-8 No.13* · Type K-8 No.13 late* |
*Previously Tsurumi Iron Works |
Japan sub-chasers | |
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Japan premium ships | |
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Motor torpedo boats | Type T-14 (mod. 1) · Type T-51a |
Motor gun boats | Type 4 (Mod 4) · PG 02 |
Sub-chasers | Type K-8 No.13 |
Frigates | Akebono |
Destroyers | IJN Satsuki · IJN Nenohi · IJN Hayanami · IJN Kiyoshimo · IJN Yuudachi · JDS Yūgure (DD-184) |
Light cruisers | IJN Yubari · IJN Mikuma |
Heavy cruisers | IJN Myoko |
Battleships | IJN Yamashiro |