United Kingdom, July 17 -- Rolls-Royce is partnering with Boeing and Lufthansa to conduct flight tests of innovations meant to improve fuel efficiency and reduce noise.Being tested on these flights are:The Next Generation Inlet, a reduced-length engine inlet demonstrator with advanced acoustic treatments. The inlet enables the integration of more fuel-efficient engines onto future platforms, and reduces weight as well as drag while maintaining the acoustic performance.Modified departure and arrival procedures, including Intelligent Operations flight paths, which aim to reduce community noise around airports. These flight paths are algorithmically generated using multiple data sources to identify opportunities for fuel-efficiency and noise b...