17 December
1903: On 17 December 1903, the Wright brothers flew the first flight in an aeroplane.
31 PRO. 2003
Datum vydání
1762
Zobrazení
1903: On 17 December 1903, the Wright brothers flew the first flight in an aeroplane.
From 1900, they had been based in Kitty Hawk, USA, attempting to build the first heavier-than-air flying machine. In 1903, they built the Flyer I, carved propellers and had an engine built. The propellers had a 66% efficiency rate. The engine was superior to manufactured ones, having a low enough weight-to-power ratio to use on an aeroplane. On 17 December 1903, the Wrights took to the air, both of them twice. The first flight, by Orville, of 39 metres in 12 seconds, was recorded in a famous photograph. In the fourth flight of the same day, the only flight made that day which was actually controlled, Wilbur Wright flew 279 metres in 59 seconds.
Okno médií
16 December
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15 December
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14 December
1546: On 14 December 1546, Tycho Brahe was born.Brahe was a Danish astronomer whose work in developing astronomical instruments and in measuring and fixing the positions of stars paved the ...
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