I went out this morning, I was waiting for phone calls to come in and the best way to get somebody to call is to do something else, to check the enterprise props. I just happen to have a set on the M3T and could easily swap the sets out on the
M3Pro. My Apple Watch has a built in decibel meter, which absolutely goes crazy when I go flying in the regular airplane. Apparently it thinks it is noisy.
With the regular props installed, the
M3Pro reads almost exactly between 73 & 74 DB from 8" (hovering next to me). With the enterprise props installed, it reads exactly the same. They sound a bit lower in pitch, but the DB is identical.
As for speed, I would need to fly what we call a wind triangle course. Doing a triangle cancels out any wind induced speed differences. Don't have time for that today, but eventually I'll get around to it.