Mounted midships, is a quadruple mounting for 'Mk 9', 21
inch diameter torpedoes. The ship only carried 4 torpedoes in the tubes
was not possible at sea since
it was a difficult procedure. Testing the torpedo by 'dry firing' in the
tube could not be done because it had to be immersed in sea water in order
to cool the engine. The torpedo mount could be rotated and fired electrically
or manually from the bridge or from a local position.
|The control box has now been repaired and the torpedo tubes can
now be rotated by electro-hydraulic means. In case the elecrics were put
out out of action, the mount could be rotated manually by using the crank
handles situated in the middle of the mount. (Photo by Jerry Proc)
Torpedoes were fired by means of an impulse charge loaded
into the breach of the firing pistol. It worked on the same principle as
a 'spitball' being blown through a straw. The explosion of gas would throw
the torpedo clear of the ship by a distance of 10 feet. Each torpedo weighed
3731 pounds, travelled at distance of 14,000 yards at 35 knots or 10,000
yards at 40 knots. Its warhead was filled with 250 pounds of 'Torpex' explosive
which had the equivalent force of 800 pounds of TNT. A MK 9 torpedo
was driven by a 4 cylinder radial diesel engine so it also had to carry
an internal air supply.
|The breech of the firing pistol has been opened up to show the impulse
charge. (Photo by Jerry Proc)
|Starboard Torpedo firing station. After the target was sighted from
this station, the torpedoes were remotely launched by lifting one those
four little black levers in the centre of the photo. There was an identical
station on the port side. If the bridge was put out of action, the torpedoes
could still be fired under local control from the torpedo tubes.
The torpedo tubes were labelled E-R-I-F when looking from the back.
The firing levers on either side of the bridge (located under the torpedo
aimer) on the starboard side, left to tight, were engraved FIRE.
The officer or chief pulling those triggers did them in the order of F-I-R-E
(if four were to be fired). On the port side the levers were marked
ERIF and the firing officer pulled them in that order starting with F.
That firing sequence had been proven to avoid collisions or turbulence
caused by the torpedoes being too close together once in the water. In
all of this what's important is that firing sequence must begin from the
aft most tube regardless if they are in the port or starboard positions.
by Jerry Proc)
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