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Owing to these qualities they are utilised for prolonged and searching reconnoitring duties such as strategical reconnaissances as distinct from the hurried and tactical reconnaissances carried out by fleeter machines. While they are not so speedy as the monoplanes of the German military establishment, endurance in this instance is preferable to pace.
A course of instruction was arranged concerning the making and flying of airships. In the former Mr. Vardon was the chief lecturer, as he had had more practical experience in building the aircraft than had either of the army captains. But the army men had made a study of air currents, and the management of biplanes and monoplanes, and were equal to Mr. Vardon in this respect.
On January 25th the Brussels Exhibition opened, when the Antoinette monoplane, the Gaffaux and Hanriot monoplanes, together with the d'Hespel aeroplane, were shown; there were also the dirigible Belgica and a number of interesting aero engines, including a German airship engine and a four-cylinder 50 horse-power Miesse, this last air-cooled by means of 22 fans driving a current of air through air jackets surrounding fluted cylinders.
He lifted the stem still more, opened one valve on his left wing and swept round and up. He looked down with a steady head, and up. One of the Ostrogite monoplanes was driving across his course, so that he drove obliquely towards it and would pass below it at a steep angle. Its little aeronauts were peering down at him. What did they mean to do? His mind became active.
When they stopped for an hour at Hirson, men and women with tricolour badges upon the platform distributed cakes and glasses of beer to the thirsty soldiers, and there was much cheerfulness. 'Such good, cool beer it was, he wrote. 'I had had nothing to eat nor drink since Epsom. A number of monoplanes, 'like giant swallows, he notes, were scouting in the pink evening sky.
Up to this point an attempt has been made to give some idea of the progress that was made during the eleven years that had elapsed since the days of the Wrights' first flights. Much advance had been made and aeroplanes had settled down, superficially at any rate, into more or less standardised forms in three main types tractor monoplanes, tractor biplanes, and pusher biplanes.
In all monoplanes the tail really forms part of the supporting surface of the machine, and the adding of the weight of the gasoline would be placing but little additional duty on the tail, and it could be readily provided for by a larger tail surface, if required.
Wakefield Damon, now one of his closest friends, of a broken-down motor cycle. Through a series of inventions, some of them of a marvelous kind, Tom Swift, aided by his father, had forged ahead, building motor boats, airships, submarines, monoplanes, motion picture cameras, searchlights, cannons, photo-telephones, war tanks.
"We'll stick it out till daylight some how, Peg," he promised, "and I'm confident that by that time they'll send up one of the monoplanes, and from up in the air they'll have no difficulty in locating us." The thought was a comforting one, and Peggy's first flush of passionate grief and fear gave way to calmer feelings. No doubt it would be as Roy had forecast.
All save Innis, who was steering, crowded around the odd window. "Why, there's an airship meet going on down there," said Dick. "Look, there are a lot of monoplanes and some biplanes." "Let's go down a bit and salute them," suggested Larry. "Down she is!" cried Innis, as he pulled over the lever of the deflecting rudder. "Say when, Dick." "Oh, keep her up about two thousand feet.
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