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The excerpt represents the core issue or deciding factor on which you must meditate, and is drawn from Aeroplanes and Dirigibles of War by Frederick A. Talbot: the voltage is raised to 30,000 volts, at which the condenser is
charged. In this instance the musical spark method is employed.
The whole of the high tension wiring is placed within a small
space so as not to endanger the pilot, while the transformer is
hermetically sealed in a box with paraffin. The aerial comprises
a trailing wire 100 feet in length, which, however, can be
wound in upon its reel within 15 seconds. This reeled antenna,
moreover, is fitted with a safety device whereby the wire can be
cut adrift in the event of an accident befalling the aeroplane
and necessitating an abrupt descent. With this apparatus the
French authorities have been able to maintain communication over
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