Some of the models in Thunderbird 40 years ago showed more design flair than we see these days.
I did like Fireflash, apart from the fact that it was a hypersonic aircraft with a very thick wing (1st class is in the wing section) and so would get rather warm trying to push it through the air, even on the edge of space. I assume power was no problem because it was nuclear powered. It was also fun to see the 60s technology used to build it, all the exposed terminals and the High Voltage signs. Modern health and safety would have a fit.
Sadly, the only practical flying machine they had was Thunderbird 6.