I would like to know why aircraft, and spacecraft produce a double sonic boom on breaking the sound barrier.
A while ago, I thought I got it, as there’s a start and finish point to every vehicle.
But is that it?
I already knew that condensation on wingtips and tail fins is caused by localised hypersonar and the pressure induced by the shockwave.
I researched a few articles and watched a few flights (not like I ever need an excuse! 😁), but still don’t understand why it isn’t a smooth lengthwise transition once the first shock has been achieved.
Any explanations most welcome, with thanks in advance!
Post scriptum; I don’t have 1000 rep, and so can’t tag this with max Q.
PPS Or where it generally happens either, apparently.
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