Foo Fighter said:
OK, read that and a few things that bother me. The life expectancy is extended to what appears to me to be an arbitrary figure. How can any military or government do that with any degree of certainty?
Historic trends and thorough analysis, but realistically they can't.
This is something used to pull the wool over the eyes of the gullible.
Or something done to seed doubt in the program; a ~50 year lifecycle cost has never been calculated on an official scale for any previous fighter; do you think Lockheed and the JPO appreciate having their project called "the trillion dollar fighter"?
Since when has a strike aircraft had a 55 year service life? How can anyone state an airframe can do this?
No individual F-35 has a 55 year service life; each jet is meant to operate for about ~30 years, flying ~250 hours a year on average. They can state the airframe's capacity to achieve such a goal by accelerated stress testing, as has been done on many other fighters. If you're simply questioning the idea that the F-35 fleet will last another 54 years, then look at the F-15; it's been in service for 40 years and is being required to operate through to the 2040s. The F-4 just had its final flight in US service after a 54 year service life.
The idea of drones in this roll has receded somewhat but over the next 55 years how can anyone say this will remain the case?
I don't think anyone is suggesting that the F-35 will be regarded as a high-end fighter 50 years from now, but it'll have its roles, unless throwing away airframe flight hours is deemed cheaper than not replacing it with a 7th gen UCAV or whatever exists then. It'll be no different to how we fly Block 50 F-16Cs today.