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So Tom was not trusting to any automatic arrangement, but had instituted, almost at the last moment, a duplicate hand-worked system, so that if one failed him he would have the other. "A good start!" shouted Mr. Damon in his car. Tom nodded, and glanced behind him. On a line with the Humming-Bird, and at about the same elevation, were the Bleriot monoplane and a Wright biplane.

In the first place he had chosen to drop beyond the wreck of Percy's biplane. This he had purposely done, in the hope that the wind might drift them down upon the other aircraft. A minute's observation convinced Frank, however, that if they waited for this to happen, the frail support which was buoying Casper Blue and his mate up would have gone under long long before they could get within touch.

"Well, for one thing, the Chief seemed to think the thieves might have had inside information, they seemed to know so much about things connected with the bank, our having an aeroplane, where we lived, what our habits were, and then about Percy's biplane in the bargain.

"Yes, sure; we talked that over before, Frank, and came to the conclusion that either they'd met with some sort of accident to the biplane, and had to hold over till the fellow who used to be an aviator repaired the same; or else that they had some other robbery in mind, and wanted to make a double killing of it before skipping out." "All right.

There were about twenty-two establishments making different types of heavier-than-air machines, monoplane and biplane, engined for the most part with the four-cylinder Argus or the six-cylinder Mercedes vertical type engines, each of these being of 100 horse-power it was not till war brought increasing demands on aircraft that the limit of power began to rise.

Phew! what an imagination that artist must have!" "And here is a picture showing the train climbing over the biplane!" returned Tom. "Say, it's a wonder we didn't wreck the Express instead of the Express wrecking us!" On the day following the accident the boys were told, after class hours, that some gentlemen wished to see them.

It enabled Santos-Dumont to make his first public successful flights. Nearly all aeroplanes follow the same general principles of construction. Of course a good deal depends upon the form of aeroplane whether a monoplane or a biplane. As these two forms are the chief ones, as yet, of heavier than-air machines, it would be well to understand them.

As he neared it he saw a light in the shed where the little biplane was housed. Dave went to the half open door of the place to find Hiram Dobbs with a lantern puttering about the machine. "What have you been up to, Hiram?" challenged Dave. "Why, hello! Got back? Good!" cried Hiram, rushing forward to warmly welcome his best friend. "Yes, just arrived," answered Dave.

Louis Bleriot came into the ring on April 5th, 1907, with a first flight of 6 seconds on a Bleriot monoplane, his eighth but first successful construction. Henry Farman made his first appearance in the history of aviation with a flight of 935 feet on a Voisin biplane on October 15th 1907.

Behind was a growing blackness that denoted approaching night. To both Bangs' and Erwin's astonishment, the biplane, instead of returning, was pointing downward after the crippled Fokker. Then from the north whirled a sea-fog that presently enveloped all, obliterating what remained of light, hiding even Blaine and the adversary he had pursued. It was strange, mysterious.