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Porpoise 1935

Ships

Name	No	Yard No	Builder	Laid down	Launched	Comp	Fate
Porpoise	M14 - N14		Vickers-Armstrong, Barrow	9/1931	30.8.1932	4/1933	sunk 16.1.1945

Technical data

Max speed, kts, kn	15.5 / 8.75
Displacement standard, t	1500
Displacement normal, t	1768 / 2053
Length, m	88.1
Breadth, m	9.09
Draught, m	4.84
No of shafts	2
Machinery	2 Admiralty diesels / 2 electric motors
Power, h. p.	3300 / 1630
Fuel, t	diesel oil 155 - 190
Endurance, nm(kts)	6300(10.6) / 64(4)
Armament	1 x 1 - 120/45 QF Mk IX, 6 - 533 TT (bow; 12), 50 M3 mines
Electronic equipment	type 120 sonar
Complement	59
Diving depth operational, m	60

Standard scale images

Graphics

Project history

First, partly experimental unit of unique British special minelaying submarine class. Porpoise was built under the 1930 Programme. Design was created on basis of "Р" class. Saddle-tank submarine had an operational diving depth 60m, maximal designed depth was 95m. Fuel tanks, arranged out of a pressure hull, were welded. Two horizontal mine tubes for 50 M3 mines placed in a superstructure and extended from an aft end to a bow on about 70m.

Modernizations

1934:  1 x 1 - 120/45; + 1 x 1 - 102/40 QF Mk XII

1940s: submarine received ability to carry 12 M2 mines instead of torpedoes.

1942-1943: + type 286W or type 291 radar

Naval service

Porpoise was sunk by Japanese aircraft off Malayan coast 16.1.1945.