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时间: 2019年12月06日 18:02

It became apparent, even in the early stages of heavier-than-air flying, that four-cylinder engines did not produce the even torque that was required for the rotation of the power shaft, even though a flywheel was fitted to the engine. With this type of engine the breakage of air-screws was of frequent occurrence, and an engine having a more regular rotation was sought, both for this and to avoid the excessive vibration often experienced with the four-cylinder type. Another point that forced itself on engine builders was that the401 increased power which was becoming necessary for the propulsion of aircraft made an increase in the number of cylinders essential, in order to obtain a light engine. An instance of the weight reduction obtainable in using six cylinders instead of four is shown in Critchley鈥檚 list, for one of the four-cylinder engines developed 118.5 brake horse-power and weighed 1,100 lbs., whereas a six-cylinder engine by the same manufacturer developed 117.5 brake horse-power with a weight of 880 lbs., the respective cylinder dimensions being 7.48 diameter by 9.06 stroke for the four-cylinder engine, and 6.1 diameter by 7.28 stroke for the six-cylinder type. Meanwhile, Algernon, unconscious of the watcher behind him, proceeded straight onward to the post-office. Then he turned up the narrow passage or entry in which was the side door that gave access to his private office. Castalia did not follow him beyond the mouth of the entry. Standing there and listening, she heard the sharp sound of a match being struck, then the turning of a key, and a door softly opened and shut. What is your business with me? he asked, peering at her in perplexity. � With us it was a well-known thing among the Faculty for miles around Ancram Park. Our extremities were never cold, nor had we ever red noses. I believe a red nose was absolutely unknown in our family. No doubt that was part of the same thing; perfect circulation of the blood. The supporting surface of the wings was ample,141 and experiment showed the engine capable of supplying more than the necessary motive power. 色999日韩偷自拍拍_日逼视频_黄色视频网站 Algernon himself was rather hopeful since that interview with Rhoda. It could not be, after all, that Jonathan Maxfield would actually cause him, Algernon Errington, any personal inconvenience for the sake of a sum which was really a mere trifle to Maxfield, and which appeared very trifling to Algernon under every aspect except that of being called upon to pay it. Meanwhile Algernon sat in the little dining-room, with a strange sensation, as if every muscle in his body had been turned into lead. He must get up, and go out as the woman had said. He must! But there he sat with that sensation of marvellous weight holding him down in his chair. The house was absolutely still. Lydia, unable to remain alone in the kitchen, had gone to stand at the front door and stare up and down the road. Thus she heard nothing of footsteps approaching the house at the back, coming hurriedly through the garden, and pausing at the threshold of the door, which was open. I daresay your mother will come too, said Castalia, "and bring Rhoda Maxfield with her. I asked her." Some of the above-mentioned names were of men well and widely known. Lord Metcalfe, at one time Acting Governor-General of India, was a wise and most courteous Indian statesman, whose life has been written by Sir John Kaye. Colonel Sykes was one year Chairman of the Court of Directors. Sir Henry Pottinger was a famous diplomatist. Lord Glenelg, living near, was often in and out, and loved to have a cup of tea at hospitable No. 3. You think so, do you?