[Noumenon]

No one has a clue. We’re on a soft field airstrip, so we’re used to flyovers and the occasional helicopter, but nothing sounded like this. The odd thing was the utter lack of structural vibration.

I thought at first I was hearing a BNSF train off in the distance, but no train ever sounded like that.

[GOPJ]

We’re on a soft field airstrip, so we’re used to flyovers and the occasional helicopter, but nothing sounded like this. The odd thing was the utter lack of structural vibration...

That is strange. The sounds were recorded, right? Thanks for sharing.