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THE TORPEDO
179
pedoes were fitted with small three cylinder single acting
engines, the cylinders being arranged about the crank
shaft radially. It is believed now, that since the Bliss-
Leavitt people of this country have adopted the turbo-
Photo-copyright, International Film Service
Spent torpedo coming to the surface
motor for propulsion, the Whitehead people have done so
too. The engine —both types are similarly connected—is
connected to the air flask by piping in which are placed
two valves. One of these is a shut-off valve which is
opened by a wrench before the torpedo is placed in the
launching tube ready to be fired. The other is an auto-
matic valve which is opened by a tripping device as the
torpedo leaves the tube. A lever from the valve project-
ing above the torpedo, by striking against the projection
in the tube is thrown back and the valve opened. There
is a further lever however, which must be thrown down
before the engine can start. This is actuated by the resist-