时间： 2019年12月11日 03:42

America had its Army Aviation School, and employed Burgess-Wright and Curtiss machines for the most part. In the pre-war years, once the Wright Brothers had accomplished their task, America鈥檚 chief accomplishment consisted in the development of the 鈥楩lying242 Boat,鈥?alternatively named with characteristic American clumsiness, 鈥楾he Hydro-Aeroplane.鈥?In February of 1911, Glenn Curtiss attached a float to a machine similar to that with which he won the first Gordon-Bennett Air Contest and made his first flying boat experiment. From this beginning he developed the boat form of body which obviated the use and troubles of floats鈥攈is hydroplane became its own float. It was owing to the incapacity鈥攁pparent or real鈥攐f the British military or naval designers to produce a satisfactory rigid airship that the 鈥楴.S.鈥?airship was evolved. The first of this type was produced in 1916, and on her trials she was voted an unqualified success, in consequence of which the building of several more was pushed on. The envelope, of 360,000 cubic feet capacity, was made on the Astra-Torres principle of three lobes, giving a trefoil section. The ship carried four fins, to three of which the elevator and rudder flaps were attached; petrol tanks were placed inside the envelope, under which was rigged a long covered-in car, built up of a light steel tubular framework 35 feet in length. The forward portion was covered with duralumin sheeting, an aluminium alloy which, unlike aluminium itself, is not affected by the action of sea air365 and water, and the remainder with fabric laced to the framework. Windows and port-holes were provided to give light to the crew, and the controls and navigating instruments were placed forward, with the sleeping accommodation aft. The engines were mounted in a power unit structure, separate from the car and connected by wooden gangways supported by wire cables. A complete electrical installation of two dynamos and batteries for lights, signalling lamps, wireless, telephones, etc., was carried, and the motive power consisted of either two 250 horse-power Rolls-Royce engines or two 240 horse-power Fiat engines. The principal dimensions of this type are length 262 feet, horizontal diameter 56 feet 9 inches, vertical diameter 69 feet 3 inches. The gross lift is 24,300 lbs. and the disposable lift without crew, petrol, oil, and ballast 8,500 lbs. The normal crew carried for patrol work was ten officers and men. This type holds the record of 101 hours continuous flight on patrol duty. Castalia heard the street-door shut. She rose swiftly from the bed on which she had thrown herself, put on a bonnet and cloak, muffled her face in a veil, and followed her husband. Lord Seely's face was almost lead-coloured. He pressed his hands one on each side of his head with a gesture of hopeless bewilderment. "This is the most appalling thing!" he murmured, and his voice was scarcely audible as he said it. Rhoda stood up as she said it, and Diamond had no choice but to rise too, and say farewell. He drew her gently towards him and kissed her. "Will you try to love me, Rhoda?" he said, in a tone of almost sad entreaty. "Do you think you shall be able to love me a little?" � 日本a级作爱片_奶好大我想吃 � � Sophia. O Ratty! our duty remains the same! [Exeunt.] Jean-Pierre Blanchard, later to acquire fame in connection with balloon flight, conceived and described a curious vehicle, of which he even announced trials as impending. His trials were postponed time after time, and it appears that he became convinced in the end of the futility of his device, being assisted to such a conclusion by Lalande, the astronomer, who repeated Borelli鈥檚 statement that it was impossible for man ever to fly by his own strength. This was in the closing days of the French monarchy, and the ascent of the Mongolfiers鈥?first hot-air balloon in 1783鈥攚hich shall be told more fully in its place鈥攑ut an end to all French experiments with heavier-than-air apparatus, though in England the genius of Cayley was about to bud, and even in France there were those who understood that ballooning was not true flight. Another day