|
Particulars
of British Submarines 1939
PORPOISE
ENLARGE
| 1930
Estimates |
Porpoise |
Vickers |
1933 |
Earlier British
minelaying submarines carried their mines in vertical tubes through
the saddle tanks but the number that could be embarked in this
way was small. In the twenties M3 was converted to carry her mines
on a track along the top of the pressure hull as in a surface
minelayer and so could carry many more of them. Porpoise was a
“new construction” version of M3 and was basically a
minelaying version of a P-class submarine.
|
Dimensions
|
288'
x 29.9' x 18' = 1782 tons (surface)
2053
tons (submerged)
|
|
Armament
|
Six
21" bow torpedo tubes. Twelve 21" Mark VIII
torpedoes.
Fifty Mark XVI moored contact mines.
One 4" QF Mark III gun on an S1 mounting. 120 rounds
ammo.
Two Lewis guns and five rifles.
|
|
Propulsion
|
Twin
Diesel engines 3300 HP = 16.16 knots.
150 tons oil fuel = 3860 miles @ 16 knots or 11,500 miles
at 8 knots.
1.7 tons per day on patrol.
Main motors 1630 HP = 8.9 knots submerged.
Batteries. 336 cells of 138 tons = 0.9 hrs @ 9 knots submerged.
|
|
Hull
|
Modified
saddle tank.
Diving depth 300 feet.
|
|
Complement
|
5
Officers and 54 men.
|
|
Detecting
devices
|
Two
40foot periscopes.
Type 118 asdic set
|
|