WORLD WAR II AIRCRAFT - INFO

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  WORLD WAR II AIRCRAFT WHEN WORLD WAR II began in 1999, air forces had already replaced most of their fabric skinned biplanes with all metal, stressed-skin monoplanes Aireraft played a far greater role in military operations during World War II than ever before, The wide range of sireraft duties, and the introduction of radar tracking and guidance systems, put pressure on designers to improve aircraft performance. The main areas of improvement were speed, range, and engine power. Bombers became larger and more powerful - converting from two to four engines in order to carry a heavier bomb load: the US B 17 Flying Fortress could carry up to 6,2 tonnes (6,1 tons) of bombs ver a distance of about 3,200 km 2.000 miles), Some aircraft increased their range by using drop tanks (fuel tanks that were jettisoned when empty to reduce drag). Fighters needed speed and manoeuvrability: the Hawker Tempest shown here had a maximum speed of 700 kph (36 mph), and was one of the few Allied aircra...
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STEAM LOCOMOTIVES INFO

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steam  locomotivEs


WAGONS THAT ARE PULLED along tracks have been used to transport material since the 16th century,but these trains were drawn by men or horses until the invention of the steam locomotive.Steam locomotives enabled the basic railway system to realize its true potential.In 1804,Richard Trevithick built the world's first working steam locomotive in south wales.It was not entirely successful,but it encouraged others to develop new designs               


         By 1829, the British engineer Robert Stephenson had built the "Rocket", considered to be the forerunner of the modern locomotive. The "Rocket" was a self-sufficient unit, carrying coal to heat the boiler and a water supply for generating steam. Steam passed from the boiler to force the piston back and forth, and this movement turned the driving wheels, propelling the train forwards. Used steam was then expelled in characteristic "chuffs". Later steam locomotives, like "Ellerman Lines" and the "Mallard", worked  in a similar way, but on a much larger scale. The simple design and reliability of steam locomotive ensured that they changed very little in 120 years of use, before being replaced from the 1950s by more efficient diesel and electric power.

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WORLD WAR II AIRCRAFT - INFO

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