I would estimate that aircraft passing directly overhead are probably within 5 minutes of touchdown, and almost never have extended their landing gear.
I often hear a short, loud sound lasting no more than about a second that sounds like a low pitched 'BWaaaaRP'. It's definitely not the 'ripping' sound I've read about in other discussions. It's a bit more like the type of sound you might expect a rubber footed chair leg to make as it is dragged across the floor.
I'm wondering if it could be an aerodynamic sound that occurs as slats, flaps, or spoilers are beginning to be deployed or whether it's something else all together? Perhaps it's a sound made as the doors begin to open so the undercarriage can be extended, but Wahroonga's a bit too far from the airport for that isn't it?
I've searched the forum for similar discussion and can't seem to find anything. Apologies in advance if this subject has already been discussed.
), and sometimes on the smaller ERJs and CRJs, but not often.
