Complex sentence: Rolls-Royce is responsible for the propulsion system and installation in the air vehicle and the aircraft is expected to use a Rolls-Royce Adour Mk.951 turbofan.
Split into simpler sentences: Rolls-Royce is responsible for the propulsion system and installation in the air vehicle. The aircraft is expected to use a Rolls-Royce Adour Mk.951 turbofan.