Only when the wind is in the east and not all the time, but also blowing at one particular speed. When the wind is from the east is when the planes land from our direction for maximum lift, otherwise they take off above us and are too high to cause any problems. Some you could hit with a 3oz bomb (oops shouldn't say that) and a decent cast, they're only 300 feet up.
It's all manner of circumstances. A lot of the time you hear the vortexes in the trees knocking the branches about. They also seem to carry the sound of the jets with them even though the plane itself landed 2-3 minutes ago.
Small jets aren't a problem, but this was a big Malaysian 747 and worst of all are the DC10s for some reason, probably wing design. Ain't half scary at night when one comes howling up the back of your bivvy.