It was owing to the incapacity鈥攁pparent or real鈥攐f the British military or naval designers to produce a satisfactory rigid airship that the 鈥楴.S.鈥?airship was evolved. The first of this type was produced in 1916, and on her trials she was voted an unqualified success, in consequence of which the building of several more was pushed on. The envelope, of 360,000 cubic feet capacity, was made on the Astra-Torres principle of three lobes, giving a trefoil section. The ship carried four fins, to three of which the elevator and rudder flaps were attached; petrol tanks were placed inside the envelope, under which was rigged a long covered-in car, built up of a light steel tubular framework 35 feet in length. The forward portion was covered with duralumin sheeting, an aluminium alloy which, unlike aluminium itself, is not affected by the action of sea air365 and water, and the remainder with fabric laced to the framework. Windows and port-holes were provided to give light to the crew, and the controls and navigating instruments were placed forward, with the sleeping accommodation aft. The engines were mounted in a power unit structure, separate from the car and connected by wooden gangways supported by wire cables. A complete electrical installation of two dynamos and batteries for lights, signalling lamps, wireless, telephones, etc., was carried, and the motive power consisted of either two 250 horse-power Rolls-Royce engines or two 240 horse-power Fiat engines. The principal dimensions of this type are length 262 feet, horizontal diameter 56 feet 9 inches, vertical diameter 69 feet 3 inches. The gross lift is 24,300 lbs. and the disposable lift without crew, petrol, oil, and ballast 8,500 lbs. The normal crew carried for patrol work was ten officers and men. This type holds the record of 101 hours continuous flight on patrol duty. Apart from the metallic construction of aeroplanes an enormous amount of work was done in the testing of different steels and light alloys for use in engines, and by the end of the War period a number of aircraft engines were in use of which the pistons and other parts were of such alloys; the chief difficulty having been not so much in the design as in the successful heat-treatment and casting of the metal. II THE VEE TYPE Left alone, Algernon drew his chair up to the fire and lit a cigar. He did not hasten himself to examine the letters. Bills, of course! What else could they be? He began to smoke and ruminate. He would have liked to see Castalia before going to the office. He would have liked to make his own representation to her of the story he had told Lord Seely. She must be got to corroborate it unknowingly if possible. He reflected with some bitterness that she had lately shown so much power of opposing him, that it might be she would insist on taking a course of conduct which would upset all the combination he鈥攚ith the help of chance circumstances鈥攈ad so neatly pieced together. And then he reflected further, knitting his brows a little, that at any cost she must be prevented from spoiling his plans; and that her conduct lately had been so strange that it wouldn't be very difficult to convince the world of her insanity. "'Gad, I'm almost convinced of it myself," said Algernon, half aloud. But it was not true. 鈥楩eb. 1867. 2019最新国产不卡a|日本无吗无卡v清免费|在线视频播放 The Soul of Man is a Celestial Flame, It brings some dreadful recollections. A stranger contrast than he presented to the Whitford burghers by whom he was surrounded could scarcely be imagined. Not only were his bodily shape and colouring different from theirs, but the expression of his face was almost unearthly. There was some subtle contradiction between the expression of David Powell's sorrow-laden eyes and brow, and that of the mouth, with its tightly-closed lips drawn back at the corners with what on ordinary faces would have been a smile. But on his face, being coupled with a singular pinched look of the nostrils and a strained tightness of the upper lip, it became something which troubled the beholder with a sense of inexplicable pain鈥攁lmost terror. Charles. My Father! The radial type of engine, thanks to Charles Manly, had the honour of being first in the field as regards aero work. Its many advantages, among which may be specially noted the very short crankshaft as compared with vertical, Vee, or 鈥榖road arrow鈥?type of engine, and consequent greater rigidity, ensure it consideration by designers of to-day, and render it certain that the type will endure. Enthusiasts claim that the 鈥榖road arrow鈥?type, or Vee with a third row of cylinders inset between the original two, is just as much a development from the radial engine as from the vertical and resulting Vee; however this may be, there is a place for the radial type in air-work for as long as the internal combustion engine remains as a power plant.