But then the primary mission of the F-35A is supposed to similar to that of the F-117 right? And perhaps SEAD?
No. Look at the aircraft the F-35 is primarily replacing: F-16, F/A-18, Harrier. The F-22 has already replaced the F-117 in some of it's roles. F-35 will perform others, but F-35 is first and foremost a multi-role fighter. It is in concept closet to a stealthy version of the aircraft the F/A-18 was when it first entered service (minus the carrier capability in the -A version).
An aircraft with a good radar system and equally capability at air to air and air to ground missions. Except the F-35 also offers vastly superior range on internal fuel, better agility and maneuvering more akin to the capability of the F-16, which was initially intended as a day only light weight fighter. It was evolved to become more F/A-18 like with multi-mode radar, precision guided weapons capability etc, but that was not it's original intent.
F-35 will do all of this as well as SEAD, from it's inital operational capability (Block 3)...
The low observability inherent in the F-35 design, is what the US thinks a multi-role fighter will need in the future battlespace to be survivable. It includes penetrating heavily defended airspace sure, but that is not it's only purpose.
IIRC, the F-117 has been the most precise bomber yet, but I don't think they carried a lot of 2,000lb bombs and those large stand-off weapons. Or perhaps the US is thinking they probably won't need a fighter/bomber to have penetrate air-defenses and just launch a large amount of stealthy stand-off weapons, i.e. don't have to do F-117 type missions?
It employed primarily laser guided bombs, which are precise, but I'm not sure was all that much more precise than other modern aircraft employing the same weapons. The F-117 was certainly capable of carrying 2000lbs weapons internally in it's weapon bays and I'm sure they picked whatever munition was assessed as being required for the mission at hand. They didn't carry a standoff weapon as we know them today, no.
In terms of penetrating enemy air defence systems, it is quite the opposite. The US is looking at IMPROVING it's ability to penetrate enemy air defence systems in a vast variety of ways with manned, unmanned, standoff weapon systems and electronic systems all being pursued vigorously to achieve this very thing.
It is one major reason why the F-35 is considered so vital to their future force structure. Especially in the Navy and Marines, where F-35 will be the only manned LO aircraft they are likely to see in the next decade or 2.
The USAF by contrast will operate (at least) 3 separate LO manned aviation systems designed to do this very thing within the next decade.
But the costs of the F-22 are just going to go down and the F-35 costs are projected to be a LOT higher than today's estimates. Even the maintenance of the F-22's are supposed to be lower now right (or at least that's what I've read)?
Of course the production cost of the F-22 is going to go down. It's production will be finished in 2012... It's support costs won't appreciably go down though. The LO treatments on the aircraft are particularly support intensive from all reports and it is an aging aircraft too. As Swerve has mentioned, most of it's systems are mid-90's level systems and the computer code used is early-mid 90's type machine code as well. The supportability of this architecture is what has primarily killed off the F-22 as a useful platform.
I agree though that lowering the buys of the F-35 would drives costs upwards further, but then the difference in costs versus purchasing more F-22s shouldn't be that high and then you get a superior air superiority fighter which is likely going to kick PAK-FA and J-20 butt.
Or maybe the US really do believe the number of F-22s are sufficient and they just need more "bomb trucks".
The F-35 is no more a "bomb truck" than the F-16 or F/A-18 is. All are meant to be equally adept at both air to air and air to ground missions. Lockheed Martin who are tendering advanced F-16 versions in many fighter competitions around the world would not be describing the F-35 as the 'second best air to air fighter" in the world if it were demonstrably untrue and as always there is MORE to combat capability than who has the biggest, fastest, mostest...
Regards,
AD