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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: these five standardised classes, experience having established
their efficiency for the specified military services for which
they are built. In point of speed they compare favourably with
the latest types of Zeppelin, the speeds of the larger types
ranging from 32 to 48 miles per hour with a motor effort of 360
to 400 horse-power.
So far as the French airships of war are concerned, the fleet is
somewhat heterogeneous, although the non-rigid type prevails.
The French aerial navy is represented by the Bayard-Clement,
Astra, Zodiac, and the Government-built machines. Although the
rigid type never has met with favour in France, there is yet a
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