They are about that big.
tudor roundels are made for making sweetmeat to eat during a banquet.
Tudor wooden roundels decorated with paint and gliding ,including a rhyme or riddle .These were used or eating sweetmeat during the banquet.
Many specialist technicians work on modern aircraft.
in a large shed
no. modern aircraft carriers are quite large ships. But the real large ones are either supertankers, or container ships.Have a crack at List of World's longest Ships in Wikipedia.
the 'circles' that are mentioned in the question are in fact called 'roundels' and were made up of two rings around an inner circle, and coloured red,white and blue. They identified the aircraft as being British. German 'planes carried a swastika.
An example of a Roundel is a circular concentric design of National colours on the wing of a military aeroplane.
aircraft launchers
Modern aircraft have many instruments which tell the pilot everything that's happening to it. Some modern airliners could have over 200 instruments in the cockpit.
the first MODERN commercial aircraft (boeing 247) entered service in1933
In most modern aircraft the other engines will cope with one out.
It will depend on how large the real aircraft is in real life.