On a lighter note. We of the long in tooth might recall the story of the Boeing B50 Superfortress pilot being offered a trip in a RAF single seat Vampire jet fighter. The endurance of the Vampire to empty tanks was around one hour and 15 minutes if you were lucky. My old RAAF log book shows why all my Vampire trips were in general less than one hour chock to chock.
The B50 pilot was used to flying for ten hours at a time. When briefed that the endurance of the Vampire was only 1.2 hours at the very most, the Superfortress pilot was shocked and heard to say "Man - I'm in a Mayday situation even before I start the engine."..