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时间: 2019年12月09日 07:22

No; there has been several others too. But she gave 'em no encouragement; nor should I have been willing that she should. Some of them were persons in my own rank of life, and that would not do for Rhoda. I think I stand a good chance of getting the head-mastership of Dorrington Proprietary School. Dorrington is in the next county, you know. 鈥淭hat would be of little use to your husband.鈥? Go on, go on, go on! cried Castalia, drumming with restless fingers on the table and looking up at the clerk with eyes that blazed with excitement and impatience. An important result of this experimental work was that it in many cases enabled designers to produce aeroplane parts from less costly material than had previously been considered necessary, without impairing the strength. It may be mentioned that it was found undesirable to use welded joints on aircraft in any part where the material is subject to a tensile or bending load, owing to the danger resulting from bad workmanship causing the material to become brittle鈥攁n effect which cannot be discovered except by cutting through the weld, which, of course, involves a test to destruction. Written, as it has been, in August, 1920, it is impossible in this chapter to give any conception of how the developments of War will be applied to commercial aeroplanes, as few truly commercial machines have yet been designed, and even those still show distinct traces of the survival of war mentality. When, however, the inevitable recasting of ideas arrives, it will become evident, whatever the apparent modification in the relative importance of different aspects of design, that enormous advances were made under the impetus of War which have left an indelible mark on progress. Algernon spoke with indignant heat and rapidity鈥攁 calculated heat, a purposed rapidity meant to have a confusing effect on the preacher, and which had that effect; but which also excited a sympathetic indignation in many of the auditors. Powell looked wildly around him, and clasped his hands above his head. 一道本不卡免费高清字幕在线,一道本无吗dⅤd不卡在线播放,一道本不卡高清专区 Weasel鈥擜 Butler. For these engines, castor oil is the lubricant usually adopted, and it is pumped to the crankshaft by means of a gear-driven oil pump; from this shaft the other parts of the engine are lubricated by means of centrifugal force, and in actual practice sufficient unburnt oil passes through the cylinders to lubricate the exhaust valve, which partly accounts for the high rate of consumption of lubricating oil. A very simple carburettor of the floatless, single-spray type was used, and the mixture was passed along the hollow crankshaft to the interior of the crank case, thence through the automatic inlet valves in the tops of the pistons to the combustion chambers of the cylinders. Ignition was by means of a high-tension magneto specially geared to give the correct timing, and the working impulses occurred at equal angular intervals of 102鈥?5 degrees. The ignition was timed so that the firing spark occurred when the cylinder was 26 degrees before the position in which the piston was at the outer end of its stroke, and this timing gave a maximum pressure in the cylinder just after the piston had passed this position. 鈥淓ngland is a beast of a place,鈥?said Corinna. He said: 鈥淵es, but I was not born sensible. A child of ordinary powers learns to walk at a year or two old without knowing much about it; failing ordinary powers he had better learn laboriously than never learn at all. I am sorry I was not stronger, but to do as I did was my only chance.鈥? 62 Under these circumstances, it is proposed to raise an immediate sum of 锟?,000 in furtherance of the Projector鈥檚 views, and as some protection to the parties who may embark in the matter, that this is not a visionary plan for objects imperfectly considered, Mr Colombine, to whom the secret has been confided, has allowed his name to be used on the occasion, and who will if referred to corroborate this statement, and convince any inquirer of the reasonable prospects of large pecuniary results following the development of the Invention.