Badassbab said:
I was only referring to strike and air superiority jets not bombers. Those airframes are under a lot more stress due to a combination of supersonic speeds, high G turns and used a lot more for training and war purposes. I think those figures you've given are misleading as they are not from operational years but rather from when first flight tested and also they weren't built all during the 70's but over a decade or so. Also there are reasons why those aircraft are being kept in service beyond their lifespan, one being the fall of the Soviet Union which meant there were no equal adversary to warrant a mass purchase of new 5th gen aircraft and the other being the delays in procuring the F-35. If you look at fighter jets during the Cold War which basically lasted 46 years there were 2nd, 3rd and 4th generations developed which basically gave roughly 15 years lifespan per gen with say another 15 or so years of use before being completely phased out. |
That still doesn't change the reality that the designs lasted for 40-60 years and are still in operation. The same should be said for the F-35 design - that it'll last between 30 - 50 years before being fully decomissioned. Very true the airframes last shorter periods of time (unless they're B-52s), but again, the R&D cost stays mostly static for the design.
Back from the dead, I'm afraid.







