There is a question in my mind that which company should design the nozzle of jet engine - the aircraft designer or the engine designer?
If you watch this documentary:
You will see that the engine is designed without the nozzle. e.g. You see something just like the following come out from the manufacturer (Trent 700).
But in fact you will see it on aircraft just like this (Trent 700 on A330).
Which company designs this duct/nozzle/intake? The aircraft designer (in this case Airbus) or the engine designer (in this case Rolls Royce)?