Lehpron, was it an ex-BA pilot, if so, can you remember his name?
Goodness it was a while ago, maybe 7 years! I can say for sure he had a clear british-english accent, I'd assume ex-BA but not sure. I didn't catch his name, if I remember correctly, he dropped class within a month.
I remember him having a stocky appreance and bifocals where there was a split and when he turned to me or the instructor his head kinda pitch way up high.
Hope that helps some GDB
, again this decription is about seven years old. I live in the area of southern California, USA, I'm sure you can find out who I ran into knowing this much.
could you see Concorde flying at Mach 2 at 57,000ft, from the ground - or from a ship in the Atlantic say - even if there were no contrails...
: My guess is that this would be a little difficult if you didn't know the flightpath. If you prepared yourself with some algebra before hand, you might get lucky stealing a backshot.
For simplicity, let's make Concorde 200-feet long and the altitude in question 56000-feet. This comes to a ratio of 1:280 for length vs. hieght. Which means if you made a model of Concorde an inch long, you'd have to be looking up about 23 feet to see it, kinda small, huh?
Now it cruises at 1350mph which translates to 1980 feet per second and give us a length to speed ration of 1:9.9, almost 10 times it's length per second, that's fast. At this speed it would take thirty seconds to go through it's altitude. Scale that speed down to the 1:280 ratio and Concorde moves at about a half mile per hour.
Since it is going at M2.04, neglicting the changes in air temperature per altitude, the shockwave angle is approximately 29.3-degrees above & below horizon.
In other words, if you position your binocs or camera (preferable with a zoom) very near 30-degrees or pi/6 radians above the ocean as soon as you hear the boom, you might catch a glimpse of basically the picture posted at the top of this thread, without the afterburners on ofcourse.
(maybe even with a "dark sky" in the background)
Be warned though, by the time you hear the boom the plane is probably over 20 miles away, taking the curve of the earth into account and it could be a degree off. At that distance a degree is 600+ yards, keep your lens steady, you'll miss the plane completely! [it's bad enough to spot a white plane that high in a blue sky!]
I do this all the time here in SAN, planes fly over my house near Miramar before turning to land there. I used this scaling and ratio method to find out how high & fast they are going. Never tried with Concorde though, try and tell me what you think.
The meaning of life is curiosity; we were put on this planet to explore opportunities.