Things that sound great.

[R Leo]

WVO's thread about DJ's 'issue' with the Mustang got me thinking about this.

What machinery sound do you love to hear or do you think is unique? Why?

Here's few to get started:

North American B-25 - two radial engines, with exhaust manifolding that, if I understand correctly, is unique to radials.

Articulated steam locomotives - once again, two engines, unusual exhaust configuration.

Any lash-up of first generation, normally aspirated EMD locomotives - the term 'chant' doesn't begin to describe what a 96 cylinders worth of 16V-567 EMDs sounds like at 11 mph in Run-8.