Originally Posted by
grity
yes, asking about the speed...
is the sound in the film the explosion or a supersonic bang to which is heard?
There is a fair amount of background noise but from this sequence in Triumph61 post above I think the "bang" at 46 seconds is a sonic boom.
At 33 seconds we see the launch.
At 43 seconds we see the flash.
At 46 seconds there is a "bang".
3 seconds flash to bang time would suggest the flash was 1000metres away if they were linked. I think the a/c is farther away than 1000metres (from the camera) I therefore believe the 46sec "bang" to be the sonic boom.
There is a further very faint noise at 55 seconds. Flash to "noise" time 12 seconds suggests a source approximately 4000 metres away and that looks more probable.
Hope that makes sense and helps.