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Thread: When you come across the title "Is Airbus hiding an evolution?"
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Old 29th Feb 2024, 12:10
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Originally Posted by MechEngr
There is no need to go to the trouble of also building a rather expensive engine core for the purposes of evaluating the fan(s) in early stages of development...
They already started the test program using the engine core of a military GE F110 engine.

Originally Posted by MechEngr
My aerospace degree was not in propulsion - just typical aircraft aerodynamics - so I don't have an estimate for shock wave formation at the blade tips, but I recall this is the effect that limits the speed of conventional propellers and the efficient speed of the aircraft.
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.
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