Let’s say Little Jimmy is flying his kite near by the airport. A distracted pilot is landing his plane, when he manages to hit Jimmy’s kite. By luck, or maybe lack of it, the kite manages to mangle itself inside the plane’s engine. As the kite is made out of paper, wood and string it is pretty obvious it will catch on fire. Could that cause an accident?
Supposedly a kite took down a helicopter when the line, which was very long, wrapped around the actuating rods that control the blades angle of attack.
A kite passing through a jet engine compressor won’t go on fire. In the best case it will come out the back of the engine (very shortly after entering, and not in usable condition).
If the kite or string material wraps itself round one or more compressor blades, it will create a rotor imbalance. Which can be very bad, but not necessarily immediately.
If it was a propellor aircraft or a rotor craft as described by the previous poster, I can imagine a situation where a kite string winds tightly around the shaft and causes the engine to stop.
Considering that most passenger jet engines today are designed to handle decent sized birds (bones included), I think it would be pretty unlikely that string and a few ounces of thin wood would seriously affect an engine.
Of course I wouldn’t want to chance it, and if I was the pilot I would want to land to have it checked out, but I would not panic.
I know our Air Traffic Controllers call us at 9-1-1 if a kite is flying in the approach path near the airport. They don’t kid around and the police will deal with it as a priority.
I don’t think most jet engines are designed to function after a large bird strike. Rather, they are designed so they don’t fail catastrophically. So if a goose goes into the engine of a 737, it won’t explode and take the wing off with it, but it’ll stop working and the plane can land safely with the remaining engine.
In that situation, both engines hit geese and both engines failed. The loss of both engines at a very low altitude is what made the successful ditching so remarkable.
There have been cases where a sailor on an aircraft carrier went in the wrong place and got sucked into a jet engine – and promptly came out the other end as a fine bloody mist. And a human body & bones are much larger & harder than your average kite.