The little aeropiles (as for no particular reason they were distinctively called) were of an altogether different type. Several of these were going to and fro in the air. They were designed to carry only one or two persons, and their manufacture and maintenance was so costly as to render them the monopoly of the richer sort of people.

(The Aeropile from 'When the Sleeper Wakes' by HG Wells)

Their sails, which were brilliantly coloured, consisted only of two pairs of lateral air floats in the same plane, and of a screw behind. Their small size rendered a descent in any open space neither difficult nor disagreeable, and it was possible to attach pneumatic wheels or even the ordinary motors for terrestrial traffic to them, and so carry them to a convenient starting place. They required a special sort of swift car to throw them into the air, but such a car was efficient in any open place clear of high buildings or trees. Human aeronautics, Graham perceived, were evidently still a long way behind the instinctive gift of the albatross or the fly-catcher. One great influence that might have brought the aeropile to a more rapid perfection had been withheld; these inventions had never been used in warfare. The last great international struggle had occurred before the usurpation of the Council.