An early type of the Parseval-Siegsfeld observation balloon.
Used by the Germans in Russia.
An observation balloon about to ascend18 to watch enemy movements, near Metz, 25th January, 1918.
Various types of kite balloon have been introduced; the original German Parseval-Siegsfield had a single air bag at the stern end, which was modified to two, three, or more lobes19 in later varieties, while an American experimental design attempted to do away with the attached lobes altogether by stringing out a series of small air bags, kite fashion, in rear of the main envelope. At the beginning of the War, Germany alone had kite balloons, for the authorities of the Allied20 armies considered that the bulk of such a vessel21 rendered it too conspicuous22 a mark to permit of its being serviceable. The Belgian arm alone possessed23 two which, on being put into service, were found extremely useful. The French followed by constructing kite balloons at Chalais Meudon, and then, after some months of hostilities24 and with the example of the Royal Naval25 Air Service to encourage them, the British military authorities finally took up the construction and use of kite balloons for artillery-spotting and general observation purposes. Although many were brought down by gun-fire, their uses far outweighed26 their disadvantages, and toward the end of the War, hardly a mile of front was without its ‘Sausage.’
For naval work, kite balloons were carried in a378 specially27 constructed hold in the forepart of certain vessels28; when required for use, the covering of the hold was removed, the kite balloon inflated and released to the required height by means of winches as in the case of the land work. The perfecting of the ‘Coastal’ and N.S. types of airship, together with the extension of wireless29 telephony between airship and cruiser or other warship30, in all probability will render the use of the kite balloon unnecessary in connection with naval scouting31. But, during the War, neither wireless telephony nor naval airships had developed sufficiently32 to render the Navy independent of any means that might come to hand, and the fitting of kite balloons in this fashion filled a need of the times.
A necessary accessory of the kite balloon is the parachute, which has a long history. Da Vinci and Veranzio (ante, page 119) appear to have been the first exponents33, the first in the theory and the latter in the practice of parachuting. Mongolfier experimented at Annonay before he constructed his first hot air-balloon, and in 1783 a certain Lenormand dropped from a tree in a parachute. Blanchard the balloonist made a spectacle of parachuting, and made it a financial success; Cocking, in 1836, attempted to use an inverted34 form of parachute; taken up to a height of 3,000 feet, he was cut adrift, when the framework of the parachute collapsed35 and Cocking was killed.
In mid-air. A parachute descent from one of our balloons at the front, near Metz, 26th January, 1918.
The rate of fall is slow in parachuting to the ground. Frau Poitevin, making a descent from a height of 6,000 feet, took 45 minutes to reach the ground, and, when she alighted, her husband, who had taken her up, had nearly got his balloon packed up. Robertson, another parachutist, is said to have descended36 from a height379 of 10,000 feet in 35 minutes, or at a rate of nearly 5 feet per second. During the War Brigadier-General Maitland made a parachute descent from a height of 10,000 feet, the time taken being about 20 minutes.
The parachute was developed considerably37 during the War period, the main requirement, that of certainty in opening, being considerably developed. Considered a necessary accessory for kite balloons, the parachute was also partially38 adopted for use with aeroplanes in the later War period, when it was contended that if a machine were shot down in flames, its occupants would be given a far better chance of escape if they had parachutes. Various trials were made to demonstrate the extreme efficiency of the parachute in modern form, one of them being a descent from the upper ways of the Tower Bridge to the waters of the Thames, in which short distance the ‘Guardian Angel’ type of parachute opened and cushioned the descent for its user.
For dirigibles, balloons, and kite balloons the parachute is an essential. It would seem to be equally essential in the case of heavier-than-air machines, but this point is still debated. Certainly it affords the occupant of a falling aeroplane a chance, no matter how slender, of reaching the ground in safety, and, for that reason, it would seem to have a place in aviation as well as in aerostation.
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1 warfare | |
n.战争(状态);斗争;冲突 | |
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2 intermittent | |
adj.间歇的,断断续续的 | |
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3 prominence | |
n.突出;显著;杰出;重要 | |
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4 upwards | |
adv.向上,在更高处...以上 | |
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5 sundry | |
adj.各式各样的,种种的 | |
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6 besieged | |
包围,围困,围攻( besiege的过去式和过去分词 ) | |
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7 artillery | |
n.(军)火炮,大炮;炮兵(部队) | |
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8 spherical | |
adj.球形的;球面的 | |
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9 gust | |
n.阵风,突然一阵(雨、烟等),(感情的)迸发 | |
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10 fixed | |
adj.固定的,不变的,准备好的;(计算机)固定的 | |
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11 fin | |
n.鳍;(飞机的)安定翼 | |
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12 mooring | |
n.停泊处;系泊用具,系船具;下锚v.停泊,系泊(船只)(moor的现在分词) | |
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13 modification | |
n.修改,改进,缓和,减轻 | |
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14 tilted | |
v. 倾斜的 | |
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15 acting | |
n.演戏,行为,假装;adj.代理的,临时的,演出用的 | |
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16 counteracting | |
对抗,抵消( counteract的现在分词 ) | |
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17 inflated | |
adj.(价格)飞涨的;(通货)膨胀的;言过其实的;充了气的v.使充气(于轮胎、气球等)( inflate的过去式和过去分词 );(使)膨胀;(使)通货膨胀;物价上涨 | |
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18 ascend | |
vi.渐渐上升,升高;vt.攀登,登上 | |
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19 lobes | |
n.耳垂( lobe的名词复数 );(器官的)叶;肺叶;脑叶 | |
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20 allied | |
adj.协约国的;同盟国的 | |
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21 vessel | |
n.船舶;容器,器皿;管,导管,血管 | |
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22 conspicuous | |
adj.明眼的,惹人注目的;炫耀的,摆阔气的 | |
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23 possessed | |
adj.疯狂的;拥有的,占有的 | |
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24 hostilities | |
n.战争;敌意(hostility的复数);敌对状态;战事 | |
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25 naval | |
adj.海军的,军舰的,船的 | |
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26 outweighed | |
v.在重量上超过( outweigh的过去式和过去分词 );在重要性或价值方面超过 | |
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27 specially | |
adv.特定地;特殊地;明确地 | |
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28 vessels | |
n.血管( vessel的名词复数 );船;容器;(具有特殊品质或接受特殊品质的)人 | |
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29 wireless | |
adj.无线的;n.无线电 | |
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30 warship | |
n.军舰,战舰 | |
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31 scouting | |
守候活动,童子军的活动 | |
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32 sufficiently | |
adv.足够地,充分地 | |
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33 exponents | |
n.倡导者( exponent的名词复数 );说明者;指数;能手 | |
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34 inverted | |
adj.反向的,倒转的v.使倒置,使反转( invert的过去式和过去分词 ) | |
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35 collapsed | |
adj.倒塌的 | |
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36 descended | |
a.为...后裔的,出身于...的 | |
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37 considerably | |
adv.极大地;相当大地;在很大程度上 | |
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38 partially | |
adv.部分地,从某些方面讲 | |
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