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日本av_中文字幕无线观看_中文字幕无线码_中文字幕久荜在线_中文字幕_嘿嘿射在线

时间: 2019年12月13日 03:04

Charles. Perhaps you will permit me, ladies, to retire. I feel indisposed鈥攆aint! [Exit.] 鈥業t is a remarkable fact how this proportion of wing-surface to weight extends throughout a great variety of the flying portion of the animal kingdom, even down to hornets, bees, and other insects. In some instances, however, as in the gallinaceous tribe, including pheasants, this area is somewhat exceeded, but they are known to be very poor fliers. Residing as they do chiefly on the ground, their wings are only required for short distances, or for raising them or easing their descent from their roosting-places in forest trees, the shortness of their wings preventing them from taking extended flights. The wing-surface of the common swallow is rather more than in the ratio of two square feet per pound, but having also great length of pinion, it is both swift and enduring in its flight. When on a74 rapid course this bird is in the habit of furling its wings into a narrow compass. The greater extent of surface is probably needful for the continual variations of speed and instant stoppages for obtaining its insect food. The first airship propelled by the present-day type of internal combustion engine was constructed by Baumgarten and Wolfert in 1879 at Leipzig, the engine being made by Daimler with a view to working on benzine鈥攑etrol as a fuel had not then come to its own. The construction of this engine is interesting since it was one of the first of Daimler鈥檚 make, and it was the development brought about by the experimental series of which this engine was one that led to the success of the motor-car in very few years, incidentally leading to that fining down of the internal combustion engine which has facilitated the development of the aeroplane with such remarkable rapidity. Owing to the faulty construction of the airship no useful information was obtained from Daimler鈥檚 pioneer installation, as the vessel got out of control immediately after it was first launched for flight, and was wrecked. Subsequent attempts at mechanically-propelled flight by Wolfert ended, in 1897, in the balloon being set on fire by an explosion of benzine vapour, resulting in the death of both the aeronauts. � What's the matter, little woman? repeated Algernon, seating himself beside her, and putting his arm round her waist. She shrugged her shoulders fretfully, but at the same time nestled herself nearer to his side. She loved him, and it put her at an immense disadvantage with him. The A.B.C. 鈥楧ragon Fly 1A鈥?is a nine-cylinder radial engine having one overhead inlet and two overhead exhaust valves per cylinder. The cylinder dimensions are 5鈥? inches bore by 6鈥? inches stroke, and the normal rate of speed, 1,650 revolutions per minute, gives 340 horse-power. The oiling is by means of two pumps, the system being practically identical with that of the 鈥榃asp II.鈥?Oil consumption is 鈥?21 pints per brake horse-power per hour, and petrol consumption 鈥?6 pints鈥攖he same as that of the 鈥榃asp II.鈥?The weight of the complete engine, including propeller boss, is 600 lbs., or 1鈥?65 lbs. per horse-power. 日本av_中文字幕无线观看_中文字幕无线码_中文字幕久荜在线_中文字幕_嘿嘿射在线 � Weasel. I dare say 鈥檛was all a frolic, your honour, but there were odd doings here yesterday. � I hope you will overlook the intrusion, ma'am, said Maxfield, standing up with his hat in his hand, just inside the door of the little sitting-room, where Miss Chubb asked him to walk in. �