Now having flown on Concorde, I can say that it was quite some thing, on take off it stood almost vertical on it's tail as it climbed straight up so that it would not leave a noise footprint all over the place. When we where over the sea the afterburners were lit and we shot through the sound barrier with out any indication we had done it. The one thing that struck me was looking out of the windows, as you looked down the sky was blue, if you looked straight ahead then the sky took a dark purple kind of hue, and when you glanced slightly up the sky was black as black could be as you were now nearing the edge of space at over 60.000 feet and as looked across you could see the curvature of the earth, a sight to behold. During the same flight we went into one of the old time Fighter Station from WW2 and we had an escort of 16 Spitfires lined up along the wings. There was Concorde nearly stalling and the Spitfires tearing their engines out while trying to keep up.