"Dudley Henriques" wrote in message
...

The combination of a Merlin V1650-7 and a Hamilton or Aero Products
propeller at between 35 and 45 inches and between 2700 and 3000 RPM have a
sound so distinctive that many who have heard it never forget it.

Dudley, you just answered a question I've been wondering about for nearly 40
years.

I've always knew about that distinctive Merlin sounds, but there's a
secondary sound (that prop) that together makes the "Mustang Sound" like
nothing else on earth.

You could fly 1000 airplanes with 1 P51 included in the mix somewhere
directly over my head with me blind folded and I'd pick out the 51 in a
nano-second :-)