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SEATTLE — Boeing, Lufthansa Group, and Rolls-Royce will begin flight testing new technologies designed to improve fuel efficiency and reduce aircraft noise using a Boeing 787-9 Dreamliner assigned to Lufthansa.
The tests will take place later this month at Boeing’s site in Glasgow, Montana, and are expected to run through mid-August, according to a Boeing announcement. The 787-9 is serving as Boeing’s 2026 ecoDemonstrator Explorer aircraft before eventual delivery to Lufthansa and is powered by Rolls-Royce Trent 1000 engines.
Testing a Shorter Engine Inlet
One of the main technologies being tested is Boeing’s Next Generation Inlet, a reduced-length engine inlet demonstrator with advanced acoustic treatments.
Boeing said the inlet is designed to enable the integration of more fuel-efficient engines on future aircraft platforms while reducing weight and drag and maintaining acoustic performance. The shorter inlet concept is important because engine installation can influence aircraft drag, noise, weight, and overall propulsion-system efficiency.
Rolls-Royce provided engineering support and oversight for operating the Trent 1000 engine with the Next Generation Inlet installed.
“This program is the culmination of a decade of collaboration with Boeing, built on a shared ambition to reduce noise, improve efficiency and unlock more sustainable flight,” Alan Newby, Rolls-Royce director of research and technology, said in the announcement.
New Flight Paths for Lower Noise
The companies will also test modified departure and arrival procedures, including what Boeing calls Intelligent Operations flight paths.
Those flight paths are algorithmically generated using multiple data sources to identify opportunities for fuel-efficiency and noise benefits. The aim is to reduce community noise around airports while also finding more efficient operating profiles.
That part of the testing matters because aircraft noise is not only a design issue. How aircraft climb, descend, turn, and approach airports can also affect the communities beneath flight paths.
Part of FAA CLEEN Program
The technologies are being tested under Phase III of the Federal Aviation Administration’s CLEEN program, short for Continuous Lower Energy, Emissions and Noise.
CLEEN is a public-private research program that works with industry to develop and test technologies that can support lower fuel use, emissions, and aircraft noise. Julie Marks, executive director of the FAA’s Office of Environment and Energy, said the tests show how the program helps integrate advanced technologies into current and future aircraft.
Since 2012, Boeing’s ecoDemonstrator program has tested more than 260 technologies focused on safety, fuel use, emissions, noise, operational efficiency, and passenger experience.
Moving the Needle Forward
This is exemplary of how commercial aviation stakeholders—manufacturers, airlines, engine makers, and regulators—push the limits of aviation technology.
The Next Generation Inlet could help inform how future engines are integrated onto aircraft, while the Intelligent Operations work points to another area of efficiency: how aircraft are flown around airports, not only how they are built.
The test gives Lufthansa a direct role in maturing technologies that could support future fleet-modernization and sustainability goals. Rolls-Royce gets real-world data on engine-integration concepts. For Boeing, the ecoDemonstrator program keeps experimental technologies moving out of the lab and into operational flight-test conditions.
The result is a relatively small flight-test campaign with a broader purpose: proving whether fuel- and noise-reduction ideas can perform on an actual airline-bound aircraft.
Check out these Boeing 2026 ecoDemonstrator test program facts.
Featured image: Boeing
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