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时间: 2019年12月06日 02:24

This bald statement of the day鈥檚 doings is as Wilbur Wright himself has given it, and there is in truth nothing more to say; no amount of statement could add to the importance of the achievement, and no more than the bare record is necessary. The faith that had inspired the long roll of pioneers, from da Vinci onward, was justified at last. � CHAPTER VI. Weasel. Ah, so thinks some one else. Did your honour ever see young Dr. Daresby? Their work is briefly described in a little pamphlet by F. J. Stringfellow, entitled A few Remarks on what has been done with screw-propelled Aeroplane Machines65 from 1809 to 1892. The author writes with regard to the work that his father and Henson undertook:鈥? With this 200 horse-power Anzani, a petrol consumption of as low as 0鈥?9 lbs. of fuel per brake horse-power per hour has been obtained, but the consumption of lubricating oil is compensatingly high, being up to one-fifth of the fuel used. The cylinders are set desax茅 with the crank shaft, and are of cast-iron, provided with radiating ribs for air-cooling; they are attached to the crank case by long bolts passing through bosses at the top of the cylinders, and connected to other bolts at right angles through the crank case. The tops of the cylinders are formed flat, and seats for the inlet and exhaust valves are formed on them. The pistons are cast-iron, fitted with ordinary cast-iron spring rings. An aluminium crank case is used, being made in two halves connected together by bolts, which latter also attach the engine to the frame of the machine. The crankshaft is of nickel steel, made hollow, and mounted on ball-bearings in such a manner that practically a combination of ball and plain bearings is obtained; the central web of the shaft is bent to bring the centres of the crank pins as close together as possible, leaving only room for the connecting rods, and the pins are422 180 degrees apart. Nickel steel valves of the cone-seated, poppet type are fitted, the inlet valves being automatic, and those for the exhaust cam-operated by means of push-rods. With an engine having such a number of cylinders a very uniform rotation of the crankshaft is obtained, and in actual running there are always five of the cylinders giving impulses to the crankshaft at the same time. � � As I look back on that period now, I realize I had split the company in half, setting up two factionswhich began to compete fiercely with one another. There was the old guard, including many of the storemanagers, remaining loyal to Ferold, and the new guard, many of whom owed their jobs to Ron. Prettysoon, everybody began to take sides, lining up behind either Ron or Ferold, who didn't get along at all. Mrs. Jud. May I ask your name, Sir? The arrangement of the cylinders in Vee form over the crankshaft, enabling the pistons of each pair of opposite cylinders to act upon the same crank pin, permits of a very short, compact engine being built, and also permits of reduction of the weight per horse-power, comparing this with that of the vertical type of engine, with one row of cylinders. Further, at the introduction of this type of engine it was seen that crankshaft vibration, an evil of the early vertical engines, was practically eliminated, as was the want of longitudinal stiffness that characterised the higher-powered vertical engines. He is told to watch me; to drive me away if possible; to prevent me making any discoveries. I daresay they are all in a league together. I am the poor dupe of a wife鈥攖he stranger who knows nothing, and is to know nothing. We shall see; we shall see. I wonder where Ancram can have gone! That boy spoke of seeing him near Maxfield's house.