Re: How many flights?
Unfortunately, real aircraft are not that strong.
This was the first Thunderbirds episode shown, so dates from around 1965, over fifty years ago.
The effects still stand up now. Good old British brute force, ignorance and an explosives license at it's best.
Interestingly, in the episode "Terror in New York", Thunderbird 2 is crash landed using foam to ease the landing, something that is now done in reality.