mtb JMSDF No.7 class torpedo boat

[aizenns 3,590]

7号型魚雷艇

No.7 class torpedo boat

No.8 torpedo boat (PT-808), 1958

About No.7 class torpedo boat

This is Japanese torpedo boat launched 1957.

In 1950 JMSDF build No.1, 3 and 5 class, but it not get enough speed. They have only two engines, but this have 3-engine 3-shaft, it hull use Aluminum as No.3 class and it hull bottom sonar shape modified so it get 33 knots!

But it design was experimental one, so build only two (No.7 and No.8 torpedo boat)

No.7 torpedo boat was used for test ship of Gus-turbine engine.

Spoiler

No.7 torpedo boat (PT-807) with gas turbine engine

In-game performance

■Total

It speed is not enough, but it have only 2x Bofors 40mm L/60 so it seems bit difficult to fought against high-BR torpedo boats.

 

■Fire power

To front or rear it can fire only 1x 40mm L/60, but to sides it can fire 2x 40mm L/60.

There aren't other MG, but Bofors is very effective weapon when fought against small boats. Well, it'll be alright.

 

■Torpedo equipment

Experimental Type 54 torpedo is electric battery Passive acoustic homing torpedo for torpedo boat, destroyer and submarines. This is the first torpedo that Japanese design. Project started 1952, and completed in 1959.

Experimental Type 54 Torpedo Model 3
Length	760 cm
Caliber	533 mm
Speed	24 kt (44.448 km/h)
Max range	6,000 m
Explosives	TNT, 100 kg
Guidance system	Passive acoustic homing
Engine	Lead-acid battery/ DC motor (33kW/44 hp)

 

It have 4x 533mm HO-101 torpedo tube for Experimental Type 54 torpedo, so better than Japanese torpedo boats before it.

Also it have 2x mousetrap anti-sub rocket, so it have chance to destroy enemy gunboats on the front of this.

 

■Speed

Not a good: only 33 knots ≒ 61 km/h

But compared to other MTB in Japan, it speed is better than most of them.

Specification

Standard displacement		100 t
Full load displacement		135 t
Length		34.0 m
Width		7.5 m
Depth		3.5 m
Draft		1.2 m
Engine		3x Diesel engine, 3-shaft
Speed		33 kt
Weapon	Bofors 40mm L/60 single machine gun		2
	533mm torpedo tube (Experimental Type 54 torpedo)		4
	Mousetrap anti-sub rocket		2
Crew		27

 

Sources

Quote

Specification and drawings

Asagumo newspapers (1967) "Japan self-defense forces equipment yearbook"

 

History, photo, drawings and specification

Editorial department of "Ships of the World" (2004) "ALL SHIPS OF JMSDF 1952-2004", special issue of "Ships of the World", Kaijinsha Co.,Ltd. pp.87

 

History

http://military.sakura.ne.jp/navy2/pt_no7.htm

 

about Type 54 torpedo

Jun'ya Katsume (2018) "History of Building of Escort Ship of Japan Maritime Self-Defense Force", Ikarosu Publishers pp.216

 

Koda Yoji, 2013 "History of Domestic Built Destroyers of JMSDF (5), before 1st defense power development plan, FY Showa 29-32" Ships of the World, 778, pp.150

 

[leroyonly 4,310]

Open for discussion. 

[Milocat 4,850]

Would be a lovely torpedo boat for Japan.  +1.

[Borotovas 4,500]

+1

[aizenns 3,590]

Update specification of Type 54 torpedo by the new source.

[OKAZAQI 166]

+1