1.

50 points500 words about air transportation. ​

Answer»

if you satisfied with my answer please mark me as a brainlist answer an follow me. Step-by-step explanation:From ancient times MEN have wanted to fly, and many attempts were made before suitable METHODS were discovered. The first really SUCCESSFUL method to be developed was the balloon, filled with light gases such as hydrogen or helium which, being lighter than air, were able to rise above the surface.Apart from controlling the altitude of flight by releasing gas or lessening the amount of ballast carried, balloons were dependent for their general direction upon winds and air currents. Later types of balloons had rudders and steering devices.At the END of the nineteenth century rigid airships, with a solid framework rather than a simple bag of gas were developed, and these were powered by internal combustion engines. Airships were the first aircraft to cross the Atlantic, but they proved difficult to handle and were generally an un­satisfactory method of transport, and were not used after the 1920s.Gliders, utilizing air currents and capable of carry­ing men were developed in the late nineteenth century and were the forerunners of powered aircraft or aeroplanes. The first successful flight by aeroplane was by the American Wright brothers in 1903, and since that time great developments have revolution­ized air transport.Aircraft engines underwent radical alterations as gas turbines, turbo-props and then jet engines were developed, and other features such as pressurized cabins, safety devices, and remote-control landing devices for use in poor weather conditions have also greatly IMPROVED aircraft. Vertical take-off and landing, as in helicopters, has also been, evolved.



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