mtb IJN "Experimental MTB T-0" and No.1 (T-1) class torpedo boat

[aizenns 3,591]

試作魚雷艇 "T-0"

Experimental MTB "T-0"

 

1号型魚雷艇

No.1 class torpedo boat

Trial of No.2 torpedo boat (No.1 class)

 

History

IJN start to develop modern motor torpedo boats during 2nd Chino-Japanese war. It because flagship of IJN 3rd Fleet, Izumo attacked by Chinese torpedo boat.

In 1939 they get budget of MTB, but at first they import one MTB from Italy and build one experimental boat.

That experimental boat is known "T-0", and there aren't official name.

T-0 was wooden V-shaped ship with 2x used aircraft engne (Type 94 water-cooled aircraft engine).

It equip 1x 7.7mm machine gun on the bridge and 2x 45cm torpedo launcher.

It launch torpedo to stern as Germany rank 1 "LS" or Soviet rank 1 "G-5" classes.

 

Reference the data of this boat, they develop No.1 class torpedo boat (design number: T-1).

This was the only one MTB that build before Pacific war, and the fastest MTB of IJN. (Japanese MTB that faster than it is only JMSDF No.10 / 11 class!)

It shape is same as T-0 (step-less V-shape), and material was wood but it had modified lines.

It engine and weapon is same as T-0, but equip 2 MGs and  torpedo launch system was changed to drop them to both sides of hull as MAS (import from Italy).

Some people says No.1 class is the most succeeded MTB of IJN.

 

No.1 class torpedo boat built 6 and deployed at "No.1 Torpedo boat group" (第1魚雷艇隊) and used for coastal defense unit of Yokosuka base. After the start of Pacific war 3 boat deployed on Wake island, 2 boat deployed on Tarawa island and sunk.

In the end of the war only 1 boat alive in Torpedo School Training Boat.

 

In some document, this boat is classified to "Type B torpedo boats". Suggestions of warfare types of them are here: 

 

Specification

Quote

 

Experimental MTB / 19M Experimental boat common name : T-0 class
Length overall	19.000 m
Width	4.300 m
Depth	2.100 m
Draft	1.200 m (to bottom of rudder)
Displacement	18.7 tons 16..9 tonnes
Speed	35 knots
Engines	2x Type 94 gasoline engines
SHP	1,800 shp
Cruise range	270 miles at 30 knots 830 miles at 8 knots
Armaments	1x 7.7mm single machine gun 2x 45cm torpedoes

 

No.1 class torpedo boat design number: T-1
Length overall	18.000 m
Width	4.300 m
Depth	2.100 m
Draft	0.650 m
Displacement	20.133 tons 18.264 tonnes
Speed	38 knots
Engines	2x Type 94 gasoline engines
SHP	1,800 shp
Cruise range	270 miles at 30 knots 830 miles at 8 knots
Armaments	2x 7.7mm single machine gun 2x 45cm torpedoes 6x Depth Charges
Crew	1x officer 6x Sairor

 

* In "Stories of Japanese Torpedo boats", it length is 18.3 m

 

 

Drawing

Quote

T-1, No.6 torpedo boat

 

Sources

 

Quote

History and specifications

Japan Administrative Division, 2nd Demobilization Bureau (April 25, 1947) "Japanese Naval Vessels at the End of War"

This is official document about Japanese warships to report to USA. (2nd Demobilization Bureau is former Ministry of Navy)

This document published at this website http://navgunschl2.sakura.ne.jp/tenji/19-IJN_EndOfWar.html

In this document these boats classified to Type B

Spoiler

 

Quote

History and specifications

Society of Naval Architects of Japan (1977) "History of shipbuilding in showa era vol.1" Hara-Shobou publishers, pp. 597

In this book experimental boat called "T-0 class"

Quote

Drawing, history and specifications

Yoshinobu Imamura (2003) "Stories of Japanese Torpedo boats - War history and technology of high speed boats of Japanese Navy" Kojin-sha publishers

Quote

Photo

Wikipedia https://ja.wikipedia.org/wiki/第一号型魚雷艇

 

Edited November 25, 2018 by aizenns

[SAUBER_KH7 3,326]

Open for Discussion.

[tester188@psn 1,413]

In the US Navy intelligence report there is a photo of No. 2 motor torpedo boat. It may help to make camouflage skin.

 

http://archive.hnsa.org/doc/id/oni208j-far-eastern-small-craft/pg008.htm

 

+1

[aizenns 3,591]

6 hours ago, *tester188 said:

In the US Navy intelligence report there is a photo of No. 2 motor torpedo boat. It may help to make camouflage skin.

 

http://archive.hnsa.org/doc/id/oni208j-far-eastern-small-craft/pg008.htm

 

+1

Thank you very much!!

This camouflage is very curious.

[Tasty95215 2,099]

I voted "No" for the T-0 because I think it will have too weak weapons even compared to other countries' MTB's. Even the T-1 will be underpowered, although having 2 of the 7.7mm machine guns is a lot better than just the one. Still, I will support adding the T-1 as one of the reserve-rank boats for Japan. Here is some information on the torpedoes from the NavWeaps website.

 

Quote

45 cm (17.7") Type 2 (1942) and Type 2 Special

 

Ship Class Used On	Midget Submarines and MTBs
Date Of Design	1942
Date In Service	1943
Weight	Type 2: 2,169 lbs. (984 kg) Type 2 Special: 2,140 lbs. (975 kg)
Overall Length	Type 2: 220.5 in (5.600 m) Type 2 Special: 220.9 in (5.610 m)
Negative Buoyancy	584 lbs. (265 kg)
Explosive Charge	772 lbs. (350 kg) Type 97
Power / Range / Speed	Type 2: 150 HP / 3,300 yards (3,000 m) / 39-41 knots Type 2 Special: 150 HP / 2,200 yards (2,000 m) / 38-40 knots
Propulsion	Kerosene-oxygen wet-heater
Wander Right or Left (max)	50 yards @ 3,300 yards (45 m @ 3,000 m)

A modification of the aerial Type 91 Mod 3 with a larger air vessel and a different read buoyancy chamber. Engine was an dual-row, eight-cylinder radial. About 800 were made between 1943 and 1945. In addition, there was a Type 2 Special of which about 100 were manufactured in 1944. This had the same explosive charge but the smaller air vessel of the Type 91.

 

 

 

(picture from @*tester188)

[funkrockjock 30]

+1 premiums? 

[Milocat 4,857]

+1, these would be great tier 1 vehicles.  

[qwert96 700]

@aizenns The model made by Gaijin of N.1 Class motor torpedo boat (in dev server named Type T-1 (1941) ) is correct? 

Gaijin has modellet her with torpedo tubes instead of lateral dropping gears as listed in sources.

Pictures taken from @Firnen_ link:

  

[aizenns 3,591]

5 minutes ago, qwert96 said:

@aizenns The model made by Gaijin of N.1 Class motor torpedo boat (in dev server named Type T-1 (1941) ) is correct? 

Gaijin has modellet her with torpedo tubes instead of lateral dropping gears as listed in sources.

Pictures taken from @Firnen_ link:

  Reveal hidden contents

 

  

 

It seems Gaijin's mistake... I'll make bug report, thanks.

No,1 class will use torpedo dropping gear as T-51b, T-38  or T-14.

Edited May 19, 2019 by aizenns

[qwert96 700]

13 minutes ago, aizenns said:

It seems Gaijin's mistake... I'll make bug report, thanks.

No,1 class will use torpedo dropping gear as T-51b, T-38  or T-14.

Thank you! 

[OKAZAQI 166]

+1

[leroyonly 4,311]

As the No. 1 class has been implemented previously,

 

Moved to Implemented Suggestions.