*** Posted by run ***
[---snip---
I had the pleasure of seeing 2 F-16's scream past at about 7000 ft followed by 2 Tornado's about 20 min's later. The Tornado's I could hear much earlier than the F-16's. It was a great site though!

Regards

Rapier]

Hi Rapier

How early you hear the plane is not so much a noise thing, more a speed thing. Maybe the f-16's were just going faster.

How early you hear an airplane going towards you, depends on how close it is flying to the speed of sound. When we really want to impress people we keep the aircraft at .96 and the you first hear it when it passes above you.

run