Crezth
i knew you were a real man of the left
Yes, you can. 80% of the plane is the same across all three versions - that's a major selling-point, remember - and they use the same engine, the same fuselage. The big differences on your chart are because the B has a lift fan that takes up fuel space, and the C has slightly larger wings for the low speed carrier approach; that doesn't markedly alter the plane's cross section or wing load. I mean, the reason it's got one engine rather than the two that Navy and Air Force would have liked is precisely because such compromises had to be made.
What? No. Single-engine designs are intended to maximize the flight envelope. It's an efficiency consideration, not a political one.
Anyway, finishing the F-35 is pretty important at this stage because it's a stepping stone. I think Sym hit the nail on the head when he mentioned the thing about starting 6th gen development. It doesn't matter if it isn't good enough, it doesn't really have to be. It's an ambitious and, in some ways, absurd project that will advance the cause of fighter jet development by several years.
Expensive, but who cares? Austerity is for losers.