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时间: 2019年12月16日 04:42

A BALLAD. 412 Developing from the Vee type, the eighteen-cylinder 475 brake horse-power engine, designed during the war, represented for a time the limit of power obtainable from a single plant. It was water-cooled throughout, and the ignition to each cylinder was duplicated; this engine proved fully efficient, and economical in fuel consumption. It was largely used for seaplane work, where reliability was fully as necessary as high power. � Pilcher starting on glide with the 鈥楤at.鈥? Three years later he built a second dirigible, reducing the diameter and increasing the length of the gas envelope, with a view to reducing air resistance. The length of this was 230 feet, the diameter only 33 feet, and the capacity was 113,000 cubic feet, while the upper part of the envelope, to which the covering net was attached, was specially covered to ensure a stiffening effect. The car of this dirigible was dropped rather lower than that of the first machine, in order to provide more thoroughly against the danger of explosions. Giffard, with a companion named Yon as passenger, took a trial trip on this vessel, and made a journey against the wind, though slowly. In commencing to descend, the nose of the envelope tilted upwards, and the weight336 of the car and its contents caused the net to slip, so that just before the dirigible reached the ground, the envelope burst. Both Giffard and his companion escaped with very slight injuries. Wrig. [Aside.] That is to be regretted, for it is a very fair one. 久久是热频这里只精品4|久久爱免费视频在线观看|久久爱在线播放视频|久久爱免费频在线看3 鈥業 have reason to believe that the cost of the construction will come within the sum of $50,000鈥?0, and that not more than one-half of that will be called for in the coming year. For nought can make a more prepost'rous Show, � 鈥楢h, dear Maria, well may we exclaim鈥? VII LILIENTHAL AND PILCHER