Captain Airclues
Quite right, it will go very quiet in both machines.
As these guys fly jets...in their jobs, all the time (flight test, everything well planned in advance) perhaps they had no idea of the fuel burn, especially doing circuits. Folks who fly these piston aeroplanes on a regular basis...certainly do. B-17's for example. A few here in the USA on the airshow circuit, and I certainly don't remember any running out of fuel. In fact, there is one here in Arizona that flies twice a week, then goes on tour in the summer.
A real shame that all that hard work, by so many, ended up in the drink because (if the story is anywhere near accurate)... those behind the pole had no idea.
The final report will make for very interesting reading.