Back in history, propulsion integration into an aircraft was mainly related to physical aspects requiring only a low degree of sophistication.
Today propulsion integration has become a major task split between airframe and engine engineers. It now includes performance, functional and physical aspects all needing to be integrated to meet specific requirements.
The aircraft and engine configurations are therefore optionised simultaneously at a very early stage of development. Some of the major interfaces influencing configuration, performance and operability will be discussed, ie. Intake/Engine/Afterbody; Electronic Controls Integration including monitoring; Performance optimisation; Systems; Installation.