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- Alberto Santos-Dumont (14938 bytes)
2: ... built, and flew many [[balloon]]s as well as the first practical [[airship|dirigible]].
3: In addition, He made the first
6: ''[[14 Bis]]'', was the first to take off, fly, and land without the use of ...
11: ...f flying came to him while contemplating the magnificent skies of [[Brazil]] in the long, sunny aftern...
14: ...Gerais, for the city [[Paris]] in [[France]]. The first thing he did there was to buy an [[automobile]... - Bicycle (44267 bytes)
1: ...ebar and thin tires and wheels for efficiency and aerodynamics]]
5: ...eel]]s attached to a frame, one behind the other. First introduced in [[19th century|19th-century]] [[...
13: No single time or person can be identified with the invention of the bicycle. Its earliest...
17: ...The primitive bicycles of this generation were difficult to ride, and the high seat and poor weight di...
19: ...rley's [[1885]] Rover is usually described as the first recognisably modern bicycle. Soon the ''seat ... - Gliding (16947 bytes)
1: ...in-field.jpg|500px|thumb|right|A modern glider in Field]]
2: ...tive [[sport]] where individuals fly un-powered [[aeroplane]]s known as [[glider]]s or [[sailplane]]s. ...
7: ...nal abilities. There are also glider [[aerobatic|aerobatics]] competitions.
12: ...osphere to make them fly further and faster. The first German gliding competition was held at the [[W...
21: ...fluffy, cotton-wool type of cloud) with sharply defined flat bases often form at the tops of strong th... - Contrail (4281 bytes)
4: ...ight|250px|thumb|Multiple contrails in a high-traffic area]]
9: ...]] trails''' (sometimes '''vapour trails'''): artificial [[cloud]]s made by the exhaust of [[jet engin...
15: 1. Firstly, the airplane's exhaust increases the amount...
17: ...h as petrol/[[gasoline]] (piston engines) or paraffin/[[kerosene]] (jet engines) they actually use a '...
23: ...; (3,600 km²). Satellite photographs have confirmed that on one occasion jet contrails produced b... - Aeronautics (946 bytes)
3: '''Aeronautics''' is the science and practice of aerial l...
6: *[[Aerostation]] — the flying of lighter than air a...
9: ...ghter-than-air vehicle (i.e., someone involved in aerostation). As such, the two terms do not relate to ...
12: *[[Aerostation]]
15: *[[Aerodyne]]
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