ae5e56 & ae5e59 headed west over the Rockies today as GRIFN22 / GRIFN23 Possible E-2 Hawkeyes They sound pretty amazing.
bleh, i cant stand the sound of those new props. "Angry Hornets" I prefer the throbbing hum of the old 4 blade Hamilton's That will ALWAYS be my preferred sound
a 130H Mechanic told me, that is pretty much a 60Hz tone. Those props are FADEC Managed and the FADEC tries to keep them at a RPM that produces a 60Hz Tone all the time. the condition of the props just alters it based on flight performance and phase of flight.