Effortless,
As Pontius rightly says, there are a load of variables in that question. However, the overall answer would be: 'The F-35B can stay in the air a lot longer than a Harrier'. That would apply to a non-tanking sortie. This might help a little: here are some approximate internal fuel capacities:
Harrier II: 7,500 lb
Tornado: 11,200 lb (note, this figure may be slightly higher by a few hundred pounds for the RAF version)
Typhoon: 11,200 lb
F-35A: 18,000 lb
F-35B: 13,500 lb
F-35C: 19,600 lb
F-16: 7,000 lb
F-15: 13,600 lb
F-4: 13.400 lb
As you can see, all variants of the F-35 have a fairly healthy internal fuel load. That is due to the design incorporating a large number of fuel tanks integrated into the airframe.
Hope this helps, best regards as ever to all those watching their fuel gauges out there on task:
Engines
Last edited by Engines; 4th Oct 2018 at 11:15.
Reason: More information