Slightly OT - geared turbofan kinda like a ducted propjet? Put that on an MPA and get some loiter time rivalling the old P-3’s
Sort of, the fan is still a fixed pitch blade fan and has no variable pitch mechanism, but they have some sort of a variable outlet on the Nacelle which I guess may act as such. The gear box gets rid of the miss-matching that has always been their between fan and LPT speed that compressor/turbine "Spool" can now run @ and optimal RPM and the gear box does the same for the fan. You don't have the air-drive mechanism you have in a Turboprop, the gearbox is more of a direct connection altough the gearbox as I understand it floats for no miss-alignment, that must be the breaktrough that really makes this possible.