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Old 10th May 2024, 23:42
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Sailvi767
 
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Originally Posted by what next
They already started the test program using the engine core of a military GE F110 engine.



This is what I remember too (and my degree is not in aircraft propulsion either) but for comparison: The Airbus A400M military transport has a maximum Mach number of .72 using 8-blade turboprop engines. With this aircraft, noise and passenger comfort are no major issues, but it already comes close to the speed range of the RISE engine.
Normal cruise on the A400 is M.68. A increase to M.72 increases fuel consumption 20%.
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