IJN Hatsuharu class Destroyer, Nenohi (1933)

[aizenns 3,591]

初春型駆逐艦 子日 (1933)

Hatsuharu class Destroyer, Nenohi (1933)

 

• Classification: First-class Destroyer
• Class: Hatsuharu class Destroyer
• Design Number: F45

 

Overviews

Hatsuharu class was successor of Fubuki class (Special Type) built early 1930s. During WW2, Nenohi join some landing operations but sunk in July 5, 1942 by torpedo of USS Triton (SS-201).

Nenohi in early built will be one of the most curious design destroyer in Japanese tech tree.

Period that Nenohi had this style is short but I think this state seems most fit for War Thunder.

 

Pros & Cons

Pros

• Good firing ability to front (3x 12.7 cm gun)
• Good speed: in trial Nenohi reach 37.6 knots ≒69.6 km/h
• Good torpedo equipment: 3x 61 cm Triple torpedo tube with torpedo loader
• 40 mm machine gun is good to destroy torpedo boats in short range
• Unique design in Japanese naval tech tree

Cons

• Slow turret turning speed (But same as other Japanese DDs)
• Bad ship stability: easy to overturn and sunk
• Bad AA ability: in history captains of destroyers report Vickers-type 40 mm is worthless

 

About "Hatsuharu class Destroyer"

Hatsuharu class Destroyer was a Japanese Class 1 Destroyer that successor of Fubuki class Destroyers.

Fubuki class (Special Type) had very good specification. But in London Naval Treaty(1930), they limit destroyer that over 1,500T must be lower than 16% of total displacement so building of Fubuki class stopped (Its displacement was 1,680T). Because of it IJN plan new destroyer that equip same weapons on 1,400T size destroyer.

 

 

To reduce weight of hull, using lots of arc welding. Also main engine was modified and its weight reduced, too.

Also this class had unique placement of weapons. On front of bridge equip 1x twin turret and 1x single turret, and on the center it equip 3x triple torpedo tube with new weapon "Torpedo Loader" for each tubes. 

Bridge of this class is large. On the steering bridge equip launching command post, fire command post, director firing command tower and Type 93 3 m range finder in tier, and each section had bulletproof shields.

These design cause top-heavy problems. To solve this issue designers expand width of hull but to get good speed need to expand length of hull, too. But its displacement limited so its draft become shallow.

 

But these contemplates were not effective so ship stability is very bad. In the trial cruise of Hatsuharu, when steering that rudder angle 10°, ship inclining be 38 degrees. According to result inclining over 60 degrees and ship overturn.

To solve this issue designers add bulge overhanging 300 mm and limit of inclining improved to 70 degrees.

Hatsuharu and Nenohi was modified, and Wakab and Hatsushimo (they are under construction) modified, too.

But in 1933 Chidori-class Torpedo boat, Tomozuru overturned. That class had same ideas and do same modification that add bulge.

Result of investigation Committee of this incident, to get large GM value (GM値) is worthless and need to lower the center of mass.

Hatsuharu class was re-modified below:

 

Spoiler

 

• Remove bulge
• Remove flood control sections on side of hull
• Replace single turret from bow to stern and remove shelter deck
• Remove 3rd torpedo tubes and loader
• steering bridge and shrink each command post and remove armor was lower
• front funnel was lowered 1 m
• rear funnel was lowered 1.5 m
• 1st torpedo tube was lowered 30 cm
• MG base was lowered 1.5 m
• 90 cm searchlight base was lowered 2 m
• Both mast was shorten 1.5 m
• Chain deck was lowered one deck
• front 2nd ammo storage replaced to heavy oil tank
• add 70 tonne ballast on bottom
• reinforce outboard of bottom (+1.5 tonne)
• Add water injection device on heavy oil tank (about 130 tonne)

 

 

By the these modification limit of ship inclination improved to 91 degrees but speed and torpedo equipment got worse.

 

Ariake and Yugure modify its design that hull width modify 10.6 m as Hatsuharu with bulge, but by the Tomozuru incident hull design reduced. Because of it lines of them become worse and speed slowed down.

Also Hatsuharu class using Kai-Model B twin turret but they using Model C twin turret. There are other differences so sometimes they classified "Ariake class Destroyer". Design number of Ariake is "F45B", and Yugure is "F45C".

 

About Nenohi

Nenohi was second ship of Hatsuharu class. In normally its name written "子日", but sometimes in action report of Nenohi written "子の日" or "子ノ日". (Pronounce same)

Nenohi (Ne-no-Hi) means the day of "rat" in Earthly Branches. It is first day so that name is fortunate.

 

Chronological tables

Spoiler

• Dec. 15, 1931: Lay the keel, at Uraga Dock
• Dec. 22, 1932: Launch
• Sep. 30, 1933: Complement, transferred to Sasebo District
• Sep. 30, 1933: Organizing 21st Destroyer Group
• May 10  ~ Jul. 20, 1934: Docked to Kure Naval Arsenal for modification
• Nov. 15, 1934: Transferred to 1st Fleet 1st Torpedo Squadron
• Aug. 13, 1935 ~ May 9, 1936: Docked to Sasebo Naval Arsenal for reinforcement hull
• Dec. 1, 1937: Be reserve ship
• Dec. 15, 1938: Transferred to 1st Fleet 1st Torpedo Squadron
• Oct. 10, 1939: Major Matsumoto be captain
• Oct. 25, 1939: Transferred to 5th Fleet
• Nov. 15, 1939: Transferred to 2nd Chinese Fleet 15th Squadron
• Jul. 10, 1940: Major Sembongi be captain
• Sep. 4, 1941: Docked to Sasebo Naval Arsenal
• Dec. 14, 1941: ASW patrol on western side of Seto Inland Sea
• Jan.14 ~ 22, 1942: Dispatch Tokuyama to escort comvoy to Davao (Philippines)
• Jan 23 ~ 29, 1942: Dispatch Davao to escort Hatsuharu (damaged by accident) and returned to Davao
• Jan 30 ~ 31, 1942: Dispatch Davao to Bangka (Indonesia, near Sumatera)
• Feb. 2 ~ 3, 1942: Dispatch Bangka to Kendari (Sulawesi)
• Feb.6 ~ 8, 1942: Dispatch Kendari to Makassar (Sulawesi)
• Feb. 23, 1942: Dispatch Makassar to join landing operation to Bali island (Part of Operation H)
• Mar. 14, 1942: Returned to Makassar
• Mar. 16 ~ 25, 1942: Dispatch Makassar to Hashirajima (Hiroshima, Japan)
• Apr. 13 ~ 16, 1942: Cruise to Sasebo Arsenal to dock
• Apr. 24, 1942: Dispatch Dock
• Apr. 20, 1942: Major Terauchi be captain
• May 1 ~ 2, 1942: Dispatch Sasebo to Hashirajima for training
• May 20, 1942: Transferred to Northern Unit
• May 22 ~ 24, 1942: Dispatch Kure to Ominato
• May 29, 1942: Dispatch Ominato to join landing operation to Attu (Part of Operation AL)
• June 18, 1942: Reach to Holtz bay
• June 18 ~ 20, 1942: Dispatch Holz bay to offshore of Attu to patrol
• June 22, 1942: Reach to McDonald bay to patrol
• July 5, 1942: Sunk by torpedo attack of submarine USS Triton at offshore of Agattu island
• July 31, 1942: Removed from register

 

Specification

Nenohi (1933, early built)
Standard Displacement	1,400 t (plan)
Trial Displacement	1,680 t (plan)
Max Speed (Trial)	37.6 knots (Nenohi)
Length Overall	109.5 m
Length Between Perpendiculars (trial)	105.5 m
Max Width	10.0 m
Depth	6.0 m
Average Draft (trial)	3.03 m
Number of Shafts	2
Main Boiler	Ro-Go Kanhon-Type boiler	3
Main Engine	Kanhon-Type Geared Turbine	2
Engine Power	42,000 SHP
Cruise Range	4,000 miles at 18 knots
Fuel Capacity	Heavy Oil 458 t
Main Gun	50 Caliber 3rd Year Type 12.7 cm Naval Gun Type B Twin Turret	2
	50 Caliber 3rd Year Type 12.7 cm Naval Gun Type A Single Turret	1
Main Gun Ammo	150 per each gun (total: 900)
Machine Gun	Vickers-Type 40 mm Single Machine Gun	2
Machine Gun Ammo	2000 per each gun (total: 4000)
Torpedo	61 cm Type 90 Torpedo	18
Torpedo Tube	Type 90 Triple Torpedo Tube	3
Depth Charges	Type 95 Depth Charge	14
Depth Charge Thrower	Type 94 Depth Charge Thrower (Y-Gun)	1
Crew	208

 

Photos

Quote

Nenohi, Trial Cruise

Quote

Nenohi (left) and Hatsuharu (right), early built

 

Sources

Editorial department of magazine "Maru" (1990) "[Handy Size] THE IMPERIAL JAPANESE NAVY vol.17 Destroyers: Hatsuharu class, Shiratsuyu class, Asashio class, Kagero class, Yugumo class, Shimakaze" Kojin-sha publishers, p. 3-32

ISBN: 4769808186

National Diet Library

 

"Class 1 Destroyer, General plans compendium with current situation survey, September 1943" / 『一等駆逐艦　一般計画要領書　附現状調査　昭和十八年七月』

Published at http://navgunschl2.sakura.ne.jp/tenji/15-zoukou.html

 

https://ja.wikipedia.org/wiki/初春型駆逐艦

Edited November 9, 2019 by aizenns

[leroyonly 4,311]

Open for discussion. 

[Radom 4,245]

+1

[Milocat 4,854]

Sure, this would be an awesome destroyer to add to the game.  +1.

[N-Glycerin@psn 89]

This looks pretty cool. It'd be nice to finally have a Japanese destroyer with more than 2 forward guns beside Akizuki. Plus it's very unique among Japanese destroyers. I'm amazed this hasn't gotten more attention. I think it'd be a welcome addition. +1

[aizenns 3,591]

Update post to add drawings of Hatsuharu class in 1933.

Torpedo equip have very interesting placements. Especially 3rd triple tubes mounted on torpedo loader of 2nd triple tubes.

[Draco_Argentum 1,504]

Three guns to the front arc is a nice boost over the two most Japanese destroyers seem to get.

[Magiaconatus 1,679]

Marine Engineer: And... how much firepower do you want exactly?
Admiralty: yes
 

[_N4MELESS_ 2,972]

Is there a suggestion for the Hatsuharu herself ? Because i would like to see the Hatsuharu with ww2 specs (with radars and lot of 25mm guns).

[aizenns 3,591]

5 hours ago, I_NAMELESS_I said:

Is there a suggestion for the Hatsuharu herself ? Because i would like to see the Hatsuharu with ww2 specs (with radars and lot of 25mm guns).

This suggestion is for only Nenohi 1933, but Hatsuharu with late war refit seems curious, too.

Here's the drawings of Hatsuharu class, Hatsushimo in 1945. I will make suggestion about it as soon as possible.

 

Spoiler

 

 

Edited November 6, 2019 by aizenns

[_N4MELESS_ 2,972]

On 06/11/2019 at 12:08, aizenns said:

This suggestion is for only Nenohi 1933, but Hatsuharu with late war refit seems curious, too.

Here's the drawings of Hatsuharu class, Hatsushimo in 1945. I will make suggestion about it as soon as possible.

 

  Hide contents

 

 

 

One of my favorite IJN destroyers ! Hatsuharu, Yugumo and Akatsuki ^^

[OKAZAQI 166]

+1

[コタリ 2,733]

Really interesting design that is a nice contrast to the usual 1 turret at the front 2 at the rear setup. the 3x3 torpedo tubes combined with reloads for all of them would put it at the highest torpedo counts which would be really nice. Overall a unique design compared to the usual IJN destroyer layouts and I would love it in game.

[ZackZooter 55]

Don't forget that currently Ayanami holds the most torpedo load in Destroyer level... its torp launcher can reload once now + its 3 x Triple Torpedo launcher too

 

It would be nice if there any ship that have Quintuple Torpedo launcher and can reload once or 2 before forego long-reloads.... If there are any

[CokeSpray 7,274]

Suggestion passed to the developers for consideration.