The lifting part of the airship comprises a single gas bag fitted
with two ballonets provided to ensure the requisite gas-tension
in the main envelope, while at the same time permitting, in times
of emergency, a rapid change of altitude. Self-contained blowers
contribute to the preservation of the shape of the envelope, the
blowers and the ballonets being under the control of the pilot.
Planes resembling Venetian blinds facilitate vertical steering,
while the suspension of the keel is carried out in such a manner
as to secure uniformity of weight upon the gas bag. The
propelling power comprises two sets of internal combustion
engines, each developing 130 horse-power, the transmission being
through rubber belting. The propellers, built of wood, make 350
revolutions per minute, and are set as closely as possible to the
centre of resistance.
But the most salient characteristic of this machine is its
portability. It can be dismantled and transported by wagons to
any desired spot, the suspension frame being constructed in
units, each of which is sufficiently small to be accommodated in
an ordinary vehicle.
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