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时间: 2019年12月09日 12:27

67 Henson, who had spent a considerable amount of money in these experimental constructions, consoled himself for failure by venturing into matrimony; in 1849 he went to America, leaving Stringfellow to continue experimenting alone. From 1846 to 1848 Stringfellow worked on what is really an epoch-making item in the history of aeronautics鈥攖he first engine-driven aeroplane which actually flew. The machine in question had a 10 foot span, and was 2 ft. across in the widest part of the wing; the length of tail was 3 ft. 6 ins., and the span of tail in the widest part 22 ins., the total sustaining area being about 14 sq. ft. The motive power consisted of an engine with a cylinder of three-quarter inch diameter and a two-inch stroke; between this and the crank shaft was a bevelled gear giving three revolutions of the propellers to every stroke of the engine; the propellers, right and left screw, were four-bladed and 16 inches in diameter. The total weight of the model with engine was 8 lbs. Its successful flight is ascribed to the fact that Stringfellow curved the wings, giving them rigid front edges and flexible trailing edges, as suggested long before both by Da Vinci and Borelli, but never before put into practice. He stood for a minute or so at the gate of his own garden, which ran down behind the house to the river path, and watched them. The thought crossed his mind that, if any accident should occur to the boat at that spot, there would be little chance of assistance reaching it quickly. Ivy Lodge was the last house on that side of the river between Whitford and Duckwell Reach. And on the willow-fringed shore opposite not a living creature was to be seen, except some cattle grazing in the plashy fields. 鈥楾he opening of the tiny church was a delightful scene. There are only 14 or 15 baptized Christians; but the people, men and women, flocked in, till there was hardly room to sit on the ground. In the thoroughly Oriental church there are no seats.鈥? ???Regardless of her Moan, Horatia. A fugitive.... � 天天综合网网欲色,天天影视综合在线影院,天天影视涩香欲综合网 THE PARLOUR OF MRS. JUDITH鈥橲 HOUSE. Daresby. With what effrontery ... THE LAST GREAT SORROW The records quoted for 1911 form the best evidence that can be given of advance in design and performance during the year. It will be seen that the days of the giants were over; design was becoming more and more standardised and aviation not so much a matter of individual courage and even daring, as of the reliability of the machine and its engine. This was the first year in which the twin-engined aeroplane made its appearance, and it was the year, too, in which flying may be said to have grown so common that the 鈥榤eetings鈥?which began with Rheims were hardly worth holding, owing to the fact that increase in height and distance flown rendered it no longer necessary for a would-be spectator of a flight to pay half a crown and enter an enclosure. Henceforth, flying as a spectacle was very little to be considered; its commercial aspects were talked of, and to a very slight degree exploited, but, more and more, the fact that the aeroplane was primarily an engine of war, and the growing German menace against the peace of the world combined to point the way of speediest development, and the arrangements for the British Military Trials to be held in August, 1912, showed that even the British War Office was waking up to the potentialities of this new engine of war. 鈥業n coming out as a Missionary, one has to devote oneself to duties which are sometimes what would be called drudgery, and leave the care of one鈥檚 happiness to the Divine Master, whom we attempt to serve. He takes far better care of our happiness than we can.