TM4 motor torpedo boats (1940-1942)

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TM5

Ships

Names	Builders	Commissioned	Losses	Transfers	Discarding
TM4 - 21	Marine Etablissement Sourabaja, Surabaya: TM4 - 21	1940: TM4 - 8 1941: TM9 - 13 1942: TM14, 15	captured incomplete by Japan 3.1942: TM16 (No115), TM17 (No116), TM18 (No117), TM19 (No118), TM20 (No119), TM21 (No120) TM4 (3/1942, later Japanese No102), TM5 (3/1942, later Japanese No112), TM6 (3/1942, later Japanese No103), TM7 (3/1942, later Japanese No113), TM8 (3/1942, later Japanese No104), TM9 (3/1942, later Japanese No105), TM10 (3/1942, later Japanese No106), TM11 (3/1942, later Japanese No107), TM12 (3/1942, later Japanese No108), TM13 (3/1942, later Japanese No109), TM14 (3/1942, later Japanese No110), TM15 (3/1942, later Japanese No111)	none	none

Names

Builders

Commissioned

Losses

Transfers

Discarding

TM4 - 21

Marine Etablissement Sourabaja, Surabaya: TM4 - 21

1940: TM4 - 8

1941: TM9 - 13

1942: TM14, 15

captured incomplete by Japan 3.1942: TM16 (No115), TM17 (No116), TM18 (No117), TM19 (No118), TM20 (No119), TM21 (No120)

TM4 (3/1942, later Japanese No102), TM5 (3/1942, later Japanese No112), TM6 (3/1942, later Japanese No103), TM7 (3/1942, later Japanese No113), TM8 (3/1942, later Japanese No104), TM9 (3/1942, later Japanese No105), TM10 (3/1942, later Japanese No106), TM11 (3/1942, later Japanese No107), TM12 (3/1942, later Japanese No108), TM13 (3/1942, later Japanese No109), TM14 (3/1942, later Japanese No110), TM15 (3/1942, later Japanese No111)

none

Technical data

Displacement standard, t	17.5
Displacement full, t
Length, m	19.2
Breadth, m	4.30
Draught, m	1.40
No of shafts	3
Machinery	TM4 - 15: 3 Lorraine Dietrich petrol engines TM16 - 21: 3 Carmouth petrol engines
Power, h. p.	TM4 - 15: 1350 TM16 - 21: 1425
Max speed, kts	36
Fuel, t	petrol
Endurance, nm(kts)	450(33)
Armament	TM4 - 11, 15 - 21: 1 x 2 - 7.7/94, 2 - 450 TT TM12 - 14: 1 x 2 - 7.7/94, 2 DCR (8)
Complement	6

Graphics

TM5

Project history

Built in Surabaya under a little modernized design of TM3. On plan of Dutch Naval staff, they should become rather cheap and effective remedy of increasing of defensive potential of the Dutch East Indies. Steel hull with V-shaped contours. In view of backwardness of industrial base of colony, the armament and equipment of boats represented a set of "second-hand" had near at hand, and not always satisfactory quality. Aviation motors, removed from written off flying boats Dornier Wal and Fokker T.4, have been produced still in the late twenties - early 1930th. Because of strong deterioration their operation has been interfaced to serious difficulties. Together with motors, from the written off aircrafts boats received also gun armament: on one twin Lewis MG of rifle calibre in aviation-type ring mount on a bow. Torpedo launchers stood earlier on "Roofdier" type destroyers and Z class torpedo boats, and after their discarding were stored in Surabaya arsenal, and on all boats they have not sufficed, therefore TM12-14 instead of torpedoes carried depth charges.

Modernizations

None.

Naval service

All have been scuttled at Surabaja between March, 2nd and 8, 1942; subsequently they were repaired by Japanese (including incomplete boats) and commissioned by IJN as MTBs (Gyoreitei) Nos102, 112, 103, 113, 104-111 and 115-120.