The method of launching bombs from airships varies considerably.
Some are released from a cradle, being tilted into position ready
for firing, while others are discharged from a tube somewhat
reminiscent of that used for firing torpedoes, with the exception
that little or no initial impetus is imparted to the missile; the
velocity it attains is essentially gravitational.
The French favour the tube-launching method since thereby it is
stated to be possible to take more accurate aim. The objective
is sighted and the bomb launched at the critical moment. In some
instances the French employ an automatic detonator which
corresponds in a certain measure to the time-fuse of a shrapnel
shell fired from a gun.
The bomb-thrower reads the altitude of his airship as indicated
by his barometer or other recording instrument, and by means of a
table at his command ascertains in a moment the time which will
elapse before the bomb strikes the ground. The automatic
detonator is set in motion and the bomb released to explode
approximately at the height to which it is set. When it bursts
the full force of the explosion is distributed downwards and
laterally.
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