How does the kite raise into the air ?

It was an usual Sunday evening and suddenly, I noticed that the blue skies were dotted with radiant colours everywhere. Later than I realised ,those were the beautiful kites flying above the city's skyline. I rushed to my terrace to have a panoramic view. Astonishingly, the terrace, the deserted portion of the whole apartment zone, was at its hive of activity. It was the members of the ruling party of the residence, the kids, busy with kite flying and kite making. I clearly understood that this newly emerged season of kite flying in association with COVID-19 has brought them out of their gadget world. Of course, the kite flying is one of the exhilarating experiences of the childhood and none can deny it. Now, have you ever wondered what makes the kite to easily fly in the sky? Have you ever thought, what brought your kites back to the ground each and every time in spite of your numerous tries to keep it high. Yes , this the post for you guys to feed your brain with the simple yet the strong science behind those failure attempts.

To begin with, kites are mostly made of light weight papers or polythene. The diagonals are connected with the wooden sticks that cross each other. The tail end is connected with tails and also to a string which is held by the kite flier. There are 4 forces that act on the kite in this whole process, Lift, thrust, drag , and weight , and the lift force is exactly what that takes your kite to the higher altitudes without making it fall back on the ground.

The lift force acts vertically upward and when the kite is held up at the nose-up angle to the wind, it will feel a push in 2 directions. Backwards, and upwards.The kite can't go backwards,as the kite is already tied to a string.Thus the fast moving air is deflected downwards, the resulting change in momentum produce an upward force. The reason for this is that the air travelling over the top surface of the kite will go faster than the air passing underneath and this causes a pressure difference between the top and bottom surface of the kite. Fast-moving air creates less pressure; this means there is more pressure underneath the kite, and this helps to force it upwards. .The greater the difference between the low pressure above the wing and the higher pressure below the wing, the greater is the lift produced.This lifts the kite above the ground.

Nothing stops the kite from going upward, other than the weight of the kite and the string.when the kite is at a much smaller angle to the wind than when it started, this causes the upward push on the kite to get smaller too.When the upward push is equal to the downward pull of the kite's weight plus the string's weight, the kite doesn't get any higher.

Hope this brief note helps you in knowing the simple science behind the rise of the kite which is also the principle behind the takeoff of the aircraft.

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Here by @suji_durai