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[TheBoy]

Once the sonic boom has 'hit' you, you will continue to hear the jet as it heads away from you, and Mr Doppler says it will have a lower apparent frequency than a slower jet.

It appears the supersonic jet(s?) slowed down to subsonic as they crossed the M40 in the region of RAF Benson.

Ah, yes, doppler, that makes sense, thanks .


So doing a bit of schoolboy maths, and not taking into account scrambling and take off and getting up to full chat, but a Typhoon is capable of Mach2, so the Flatlands to Heathrow is possible in under 6 mins (again, assuming they were allowed and correct height to do Mach 2).  That's beyond pretty impressive.  I bet I can't get to my nearest curry house in town in 6 minutes, LOL.

I bet the pilots love getting the shout when they can give it large over land, that much be an experience.

[LC0112G]

Once the sonic boom has 'hit' you, you will continue to hear the jet as it heads away from you, and Mr Doppler says it will have a lower apparent frequency than a slower jet.

It appears the supersonic jet(s?) slowed down to subsonic as they crossed the M40 in the region of RAF Benson.

Ah, yes, doppler, that makes sense, thanks .


So doing a bit of schoolboy maths, and not taking into account scrambling and take off and getting up to full chat, but a Typhoon is capable of Mach2, so the Flatlands to Heathrow is possible in under 6 mins (again, assuming they were allowed and correct height to do Mach 2).  That's beyond pretty impressive.  I bet I can't get to my nearest curry house in town in 6 minutes, LOL.

I bet the pilots love getting the shout when they can give it large over land, that much be an experience.

Fast jets with supposed Mach2 capability are very rare. Yes they can do it 'clean' and at altitude, but once you hang fuel tanks and rockets on the wings the drag increases a lot then the max speed drops to more like Mach 1.5 above 20K feet. At sea level, very few fast jets can make much past Mach1 coz the air is so thick. It also burns shed loads of fuel, so when they arrive on the scene their loiter time isn't very good.

As for loving it, yes in training, low level high speed is popular. I've spoken to Tornado crews in Australia where they can do it over the Woomera ranges. They aren't usually cleared to go supersonic over land in the UK when intercepting foreign military threats (The Ruskies normally) because radars and other NATO countries see them coming, so they launch in plenty of time to intercept without requiring high speed dashes. Supersonic over land usually means a civil aircraft is not responsive. and on such a live QRA shout where there is a possibility (albeit remote) that you may be ordered to shoot down an airliner with 400 pax and crew, the feelings need to be much more professional considering what you may have to do when you get there.   

[Sir Tigger KC]

On my bucket list is to go and sit on that Welsh mountainside where you look down on the NATO jets flying through the valley below. 

[Raeturbo]

Went there last year Steve😎 if you want a heads up let me know it’s awesome but you are not actually  guaranteed to see anything