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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 general principle of design may be gathered from the
accompanying diagram. It is as if three sausage-shaped balloons
were disposed pyramidally--two lying side by side with one
super-imposed, with the bags connected at the points where the
circular sections come into contact. Thus the external
appearance of the envelope is decidedly unusual, comprising three
symmetrical ridges. At the points where the three bags come into
contact cloth bands are stretched across the arcs, thereby
forming a cord. The suspension system is attached to the upper
corners of the inverted triangle thus formed, and converges in
straight lines through the gas space. The bracing terminates in
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