Sorry if I appear terribly thick here but going back to the first post and the incredulity expressed about the F3 getting to FL370.
I presume that we are talking about the Tornado?
I know that there are many variants of this aircraft but I would have thought that FL400+ would have been achievable for supersonic fighter jets.
I'm not really an anorak and only learned enough on the theory front to get the ATPL's and so would welcome any replies simple or technical.