Some similar 3-bladed MT propellers were certified in Germany with a restriction to 2500 rpm continuous, 2700 rpm for takeoff. Discussion with the manufacturer indicates that this was for noise only, not for another technical reason. From a propeller life and reliability perspective this restriction is irrelevant, but it does indicate that some of the MT propellers are substantially louder at 2700 rpm. I have one, electrically controlled which allows me to preselect rpm. Mine is 175 cm diameter, smaller than the OPs, but I typically set 2600 or 2650 rpm for takeoff. I've been told mine is loud at 2700 rpm and I can imagine the 200 cm prop would be louder still.
Last edited by Silvaire1; 30th Nov 2017 at 15:06.