Originally Posted by
brakedwell
Whitworth Gloster Argosy. The Vanguard had RR Tynes.
That's the Armstrong Whitworth (AW660) Argosy surely? And since those R. Da. 10s are putting out considerably more horse power than the R. Da. 7s of my Dart Herald experience, I would venture that they're not whistling in that mode of flight, and forward of the compressors, but BLARING MIND-NUMBINGLY. Unless the sound-proofing on the Argosy flight deck was a whole lot better than in the Herald, which wouldn't be difficult, come to think of it.
Behind the line of the props, it's true that the further you walked down the cabin the more the engine sound moderated to a quite pleasant whine.