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时间: 2019年12月15日 17:51

� 鈥楴o, there is no way out there,鈥?she said. 鈥業 couldn鈥檛 stand that, nor could you. But there is a way out, and you and I are going to take it.鈥? And Mensen was just cracking his knuckles before getting down to serious business: he then ranfrom Constantinople to Calcutta, trotting ninety miles a day for two straight months. Not that hedidn鈥檛 feel it; Mensen had to rest three whole days before beginning the 5,400-mile jog backhome. So how come Mensen never got plantar fasciitis? He couldn鈥檛 have, because his legs were inexcellent shape a year later when dysentery killed him as he tried to run all the way to the sourceof the Nile. � Done? This is a hard saying for such of the aeroplane industry as survived the War period and consolidated itself, and it is but the saying of a section which bases its belief on the fact that, as was noted in the very early years of the century, the aeroplane is primarily a war machine. Moreover, the experience of the War period tended to discredit the dirigible, since, before the introduction of helium gas, the inflammability of its274 buoyant factor placed it at an immense disadvantage beside the machine dependent on the atmosphere itself for its lift. 国产成 人 综合 亚洲,亚洲国产免费综合网,国产综合亚洲区 Yes; if you like, Mr. Diamond. � The Daily Mail had offered a prize of 锟?,000 for the first Cross-Channel flight, and Hubert Latham set his mind on winning it. He put up a shelter on the French coast at Sangatte, half-way between Calais and Cape Blanc Nez. From here he made his first attempt to fly to England on Monday the 19th of July. He soared to a fair height, circling, and reached an estimated height of about 900 feet as he came over the water with every appearance of capturing the Cross-Channel prize. The luck which dogged his career throughout was against him, for, after he had covered some 8 miles, his engine stopped and he came down to the water in a series of long glides. It was discovered afterward that a small piece of wire had worked its way into a vital part of the engine to rob Latham of the honour he coveted. The tug that came to his rescue found him seated on the fuselage of his Antoinette, smoking a cigarette and waiting for a boat to take him to the tug. It may be remarked that Latham merely assumed his Antoinette would float in case he failed to make the English coast; he had no actual proof. W. F. TUCKER HAMILTON. The result is remarkable, being less than 2 lbs. weight per horse-power, especially when one considers the state of development to which the steam engine had attained at the time these experiments were made. The fining down of the internal combustion engine, which has done so much to solve the problems of power in relation to weight for use with aircraft, had not then been begun, and Maxim had nothing to guide him, so far as work on the part of his predecessors was concerned, save the experimental engines of Stringfellow, which, being constructed on so small a scale in comparison with his own, afforded little guidance. Concerning the factor of power, he says: 鈥榃hen first designing this386 engine, I did not know how much power I might require from it. I thought that in some cases it might be necessary to allow the high-pressure steam to enter the low-pressure cylinder direct, but as this would involve a considerable loss, I constructed a species of injector. This injector may be so adjusted that when the steam in the boiler rises above a certain predetermined point, say 300 lbs., to the square inch, it opens a valve and escapes past the high-pressure cylinder instead of blowing off at the safety valve. In escaping through this valve, a fall of about 200 lbs. pressure per square inch is made to do work on the surrounding steam and drive it forward in the pipe, producing a pressure on the low-pressure piston considerably higher than the back-pressure on the high-pressure piston. In this way a portion of the work which would otherwise be lost is utilised, and it is possible, with an unlimited supply of steam, to cause the engines to develop an enormous amount of power.鈥?