Trip Report



Braking the Sound Barrier


Subsonic        Mach 1.7


In the cabin


At 7.21pm we broke the sound barrier.


The transition from subsonic mach 0.95 (around 645 mph) to breaking the sound barrier was extremely extremely smooth, I was expecting to hear a crack of thunder and then being pulled back very rapidly in to my seat with G-force of acceleration but none of that happened it was extremely smooth,  If I had closed my eyes I swear I would not have known that we had just broken the sound barrier……………….  


As we accelerated through the sound barrier the centre of gravity on Concorde slowly moved from the centre of Concorde to the back of her.

= Lift above Concorde

= Gravity below Concorde

(Above video of mach meters working on a real Concorde flight)


On my flight Mach 1.0 (was around 650 mph = Speed of Sound) meant  that we had actually broken the sound barrier and we where rapidly, smoothly and gently accelerating to mach 1.7 (around 1,120 mph)


As we broke the sound barrier we started to chase the sun setting over the distant horizon, I was thrilled and very very very excited that our plane had broken the sound barrier, I was thrilled and very very very excited that I had actually broken the sound barrier, I was now flying faster than the speed of sound yipeeeeeeeeeeeeee yahoooooooooooo.


At mach 1 although the sky around me was still inky black I still looked out of my window to see if I could see any ripples in the sky or any ripples on the wings.


I looked in the cabin to see if I could see any ripples in the air surrounding me…..I looked at me to see if I could see any ripples going through me…..I looked at the back of my hand to see if I could see or feel any ripples of us braking the sound barrier going in me.


But there was nothing ………  no ripples, no shock waves, no bangs, no hint of acceleration, no G-Force,  nothing it was all just so so smooth………….if I had closed my eyes I would not have noticed breaking the sound barrier at all ………. it was that smooth.


    (Press F5 to repeat animation)


At Mach 0.95 we are below the sound barrier, centre of gravity  is at the CENTRE of Concorde, at Mach 1 we’ve broken the sound barrier, centre of gravity ‘s moved to the BACK of Concorde.


Key :-


but I never felt this happening, I never felt the plane tipping backwards, I never felt my self getting any heavier than I was before (as more gravity makes you heavier), I just felt completely normal.


As we accelerated through the sound barrier I looked at mach meters on the cabin wall at subsonic speed it read mach 0.95 but as we gently accelerated the mach meters slowly started change at 1 second intervals and said mach 0.97……mach 0.98…….......mach 0.99……MACH 1.0….mach 1.01……mach 1.02……..mach 1.03……..