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时间: 2019年12月06日 18:00

鈥楾his line of action caused a good deal of trouble with aeronauts or riders, who had unbounded confidence and wanted to make long flights after the first few trials; but I found it necessary, as they seemed slow118 in comprehending the important elements and were willing to take risks. To give them the full knowledge in these matters I was formulating plans for a large starting station on the Mount Hamilton Range from which I could launch an aeroplane capable of carrying two, one of my aeronauts and myself, so I could teach him by demonstration. But the disasters consequent on the great earthquake completely stopped all my work on these lines. The flights that were given were only the first of the series with aeroplanes patterned after the first model. There were no aeroplanes constructed according to the two other models, as I had not given the full demonstration of the workings of the first, though some remarkable and startling work was done. On one occasion Maloney, in trying to make a very short turn in rapid flight, pressed very hard on the stirrup which gives a screw-shape to the wings, and made a side somersault. The course of the machine was very much like one turn of a corkscrew. After this movement the machine continued on its regular course. And afterwards Wilkie, not to be outdone by Maloney, told his friends he would do the same, and in a subsequent flight made two side somersaults, one in one direction and the other in an opposite, then made a deep dive and a long glide, and, when about three hundred feet in the air, brought the aeroplane to a sudden stop and settled to the earth. After these antics, I decreased the extent of the possible change in the form of wing-surface, so as to allow only straight sailing or only long curves in turning. In fact, Craig said very little even to me as we started around the corner for the laboratory. The cylinders are set with the central row vertical, and the two side rows at angles of 60 degrees each; cylinder bore is 5? inches, and stroke 5? inches; the normal rate of revolution is 1,350 per minute, and the reducing gear gives one revolution of the propeller shaft to 1鈥?2 revolutions of crankshaft. Fuel consumption is 0鈥?8 lbs. of fuel per brake horse-power hour at full load, and oil consumption is 0鈥?20 lbs. per brake horse-power hour. The dry weight of the engine, complete with propeller boss, carburettors, and induction pipes, is 850 lbs., and the gross weight in running order, with fuel and oil for six hours working, is 2,671 lbs., exclusive of cooling water. � Barbara. The Colonel will stay in spite of the pigs. Preferred it to any in the world, my dear! said Mrs. Errington, mellifluously. She said it, too, with an aplomb and an air of conviction that mightily tickled Algernon, who, remembering the family rumours which haunted his childhood, thought that his respected father, if he preferred his wife's society to any other, must have put a considerable constraint on his inclinations, not to say sacrificed them altogether to the claims of a convivial circle of friends. "The dear old lady is as good as a play!" thought he. Indeed, he thoroughly relished this bit of domestic comedy. 青娱乐视频分类精品_久久草原免费观看视频_超碰视频在线_青青草视频在线观看 Jack naturally had to content himself with the briefest of nods from their hostess. Her heavy ammunition was reserved for Bobo. It was in the spring of 1896 that Pilcher built his third glider, the 鈥楪ull,鈥?with 300 square feet of area and a weight of 55 lbs. The size of this machine rendered it unsuitable for experiment in any but very calm weather, and it incurred such damage when experiments were made in a breeze that Pilcher found it necessary to build a fourth, which he named the104 鈥楬awk.鈥?This machine was very soundly built, being constructed of bamboo, with the exception of the two main transverse beams. The wings were attached to two vertical masts, 7 feet high, and 8 feet apart, joined at their summits and their centres by two wooden beams. Each wing had nine bamboo ribs, radiating from its mast, which was situated at a distance of 2 feet 6 inches from the forward edge of the wing. Each rib was rigidly stayed at the top of the mast by three tie-wires, and by a similar number to the bottom of the mast, by which means the curve of each wing was maintained uniformly. The tail was formed of a triangular horizontal surface to which was affixed a triangular vertical surface, and was carried from the body on a high bamboo mast, which was also stayed from the masts by means of steel wires, but only on its upper surface, and it was the snapping of one of these guy wires which caused the collapse of the tail support and brought about the fatal end of Pilcher s experiments. In flight, Pilcher鈥檚 head, shoulders, and the greater part of his chest projected above the wings. He took up his position by passing his head and shoulders through the top aperture formed between the two wings, and resting his forearms on the longitudinal body members. A very simple form of undercarriage, which took the weight off the glider on the ground, was fitted, consisting of two bamboo rods with wheels suspended on steel springs. � � And then the husband and wife went away together, and entered the fly that awaited them before Dr. Bodkin's door.