Boeing, Lufthansa, and Rolls-Royce will begin flight tests later this month in Glasgow, Montana to evaluate new engine inlet and operational technologies on a Boeing 787-9 ecoDemonstrator. The program, announced July 16, 2026, will use a Lufthansa-bound aircraft equipped with Rolls-Royce Trent 1000 engines.
The initiative will assess the Next Generation Inlet, designed to reduce inlet length, weight, and drag while maintaining acoustic performance, and test algorithmically generated flight paths intended to lower fuel use and community noise.
Boeing states the project aligns with the Federal Aviation Administration’s CLEEN program, which supports integration of lower-emission, quieter technologies into commercial fleets.
"The more efficient inlet and Intelligent Operations flight paths we’re evaluating on this year’s ecoDemonstrator Explorer are among the many promising concepts we’re working on," said Lane Ballard, Boeing Chief Technology Officer.
The 787-9 test aircraft is scheduled for delivery to Lufthansa after the campaign concludes, with tests expected to run through mid-August. Rolls-Royce is providing engineering support for the engine and inlet integration.
The ecoDemonstrator program, active since 2012, has tested over 260 technologies aimed at reducing fuel burn, emissions, and noise. Technologies trialed through CLEEN have contributed to ongoing developments in aircraft and engine design, according to the FAA.
"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," said Alan Newby, Director of Research and Technology at Rolls-Royce.
