Rolls-Royce has begun testing a high pressure-ratio compressor for a future fuel-efficient engine for subsonic military transports, patrol aircraft and intelligence, surveillance and reconnaissance (ISR) platforms. The announcement comes after news that Rolls has not been selected for the next phase of a U.S. Air Force Research Laboratory (AFRL) program to demonstrate adaptive engines for post-2020 combat aircraft (Aerospace DAILY, Sept. 18). The high pressure-ratio compressor ...


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