The Ash62 (a derived engine from the Wright Cyclone and older brother of the Ash 82) is also delightful to ear.
I was in Varradero/Cuba three weeks ago and every morning I was woke up by a low flying An2 skimming the roof top of this flat city built all in length on a finger like narrow peninsula. I don't know what those guys where doing but I did ear them 3 day in a row. My room was in a small building at the 3rd floor and the last day I had the time to jump out of the bed and run to the balcony just to see it nearly in profile and fully hear that beautiful grave tone that reveal nearly each stroke of its engine.
The girl that day might hve been really confused to see me getting exited that way oooops
