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时间: 2019年12月14日 07:39

The betrothed princess, bewildered, wounded, heart-broken, returned with her parents to her home, there to await the consummation of her sacrifice by being married to a man who had never addressed to her a loving word, and who, in his heart, had resolved never to receive her as his wife. The Crown Prince, unfeeling and reckless, returned to his dissolute life in garrison at Ruppin. The queen continued an active correspondence with England, still hoping to break the engagement of her son with Elizabeth, and to secure for him the Princess Amelia. 鈥淵es,鈥?the prince replied. � � 鈥淭he valet took the beef from the table and set it on the charcoal dish until wanted. He did the like with the fish and roast game, and poured me out wine and beer. I ate and drank till I had abundantly enough. Dessert, confectionery, what I could. A plate of big black cherries and a plateful of pears my waiting-man wrapped in paper, and stuffed them into my pockets to be a refreshment on the way home. And so I rose from the royal table, and thanked God and the king in my heart that I had so gloriously dined. At that moment a secretary came, brought me a sealed order for the custom-house at Berlin, with my certificates and the pass; told down on the table five tail-ducats and a gold Friedrich under them, saying, 鈥楾he king sent me this to take me home to Berlin.鈥?3 Young Ferdinand, who loved me! 日本无码不卡高清免费v 一本道av不卡免费播放 在线看片av免费观看 鈥淵es,鈥?the Crown Prince replied; 鈥渁nd I promise you that she will drive away your demon as well as mine.鈥? I'm trying鈥攖hinking what I ought to say,' she answered, almost in a whisper. 527 鈥淧.S.鈥擸ou may, in this occurrence, say what Francis I., after the battle of Pavia, wrote to his mother: 鈥楢ll is lost except honor.鈥?As I do not yet completely understand the affair, I forbear to judge of it, for it is altogether extraordinary.鈥? A careful consideration of the salient features leading to maximum efficiency in aeroplanes鈥攑articularly in regard to speed and climb, which were the two most important military requirements鈥攕howed that a vital feature was the reduction in the amount of weight lifted per horse-power employed; which in 1914 averaged from 20 to 25 lbs. This was effected both by gradual increase in the power and size of the engines used and by great improvement in their detailed design (by increasing compression ratio and saving weight whenever possible); with the result that the motive power of single-seater aeroplanes rose from 80 and 100 horse-power in 1914 to an average of 200 to 300 horse-power, while the actual weight of the engine fell from 3?-4 lbs. per horse-power to an average of 2? lbs. per horse-power. This meant that while a pre-war309 engine of 100 horse-power would weigh some 400 lbs., the 1918 engine developing three times the power would have less than double the weight. The result of this improvement was that a scout aeroplane at the time of the Armistice would have 1 horse-power for every 8 lbs. of weight lifted, compared with the 20 or 25 lbs. of its 1914 predecessors. This produced a considerable increase in the rate of climb, a good postwar machine being able to reach 10,000 feet in about 5 minutes and 20,000 feet in under half an hour. The loading per square foot was also considerably increased; this being rendered possible both by improvement in the design of wing sections and by more scientific construction giving increased strength. It will be remembered that in the machine of the very early period each square foot of surface had only to lift a weight of some 1? to 2 lbs., which by 1914 had been increased to about 4 lbs. By 1918 aeroplanes habitually had a loading of 8 lbs. or more per square foot of area; which resulted in great increase in speed. Although a speed of 126 miles per hour had been attained by a specially designed racing machine over a short distance in 1914, the average at that period little exceeded, if at all, 100 miles per hour; whereas in 1918 speeds of 130 miles per hour had become a commonplace, and shortly afterwards a speed of over 166 miles an hour was achieved. Giffard, inventor of the steam injector, had already made balloon ascents when he turned to aeronautical propulsion, and constructed a steam engine of 5 horse-power with a weight of only 100 lbs.鈥攁 great achievement for his day. Having got his engine, he set about making the balloon which it was to drive; this he built with the aid of two other enthusiasts, diverging from335 Meusnier鈥檚 ideas by making the ends pointed, and keeping the body narrowed from Meusnier鈥檚 ellipse to a shape more resembling a rather fat cigar. The length was 144 feet, and the greatest diameter only 40 feet, while the capacity was 88,000 cubic feet. A net which covered the envelope of the balloon supported a spar, 66 feet in length, at the end of which a triangular sail was placed vertically to act as rudder. The car, slung 20 feet below the spar, carried the engine and propeller. Engine and boiler together weighed 350 lbs., and drove the 11 foot propeller at 110 revolutions per minute.