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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MASS-PRODUCTION-INFO

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                            MASS-PRODUCTION



THE FIRST CARS WERE HAND-ASSEMBLED from individually build parts, a time-consuming procedure that required skilled mechanics and made cars very expensive. This problem was solved, in America, by a Detroit car manufacturer named Henry Ford; he introduced mass-production by using standardized parts, and later combined these with a moving production line. The work was brought to the workers, each of whom performed one simple task in the construction process as the chassis moved along the line. The first mass-produced car, the Ford Model T, was launched in 1908 and was available in a limited range of body styles and colours. However, when the production line was introduced in 1914, the colour range was cut back; the Model T became available, as Henry ford said, in "any colour you like, so long as it's black". Ford cut the production time for a car from several days to about 12 hours, and eventually to minutes, making cars much cheaper than before. As a result, by 1920 half the cars in the world were Model T Fords.

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