when I first heard it I did wonder if it was the AN-22 but as my fillings didn't start to rattle...
On that note, are there any AN-22's left flying outside of Russia ? There was that Volga-Dnepr(?) one flying for trade, but seemed to be beset with MX issues and not seen for a while.
There's always something highly frustrating for certain people (of which i'm one), to hear such a loud droning above the clouds and to not know what it is being made by
SHJ