[If I may, I'd like to use the bird of prey as an example of modern aerospace gone right.
http://en.wikipedia.org/wiki/Boeing_bird_of_prey
It was a successful technology demonstrator that also proved our ability to reduce development and manufacturing costs. The bleeding edge of technology CAN include off the shelf parts./QUOTE]
You are absolutely correct about the bird of prey...but not quite about the B1B. The B-1B's parent technology actually came from a civilian project--Rockwell's design for a Supersonic transport way back in the early sixties. The avionics systems and weapons systems are state of the art, but the main airframe for the Bone actually took flight in the Carter Administration, and early development actually took place during the Vietnam War. The B-1B is actually less of an airplane performance wise over the B-1A and flight dynamics are only slightly improved over the earlier model. The B model has LESS powerful engines than the A model and has a lower max speed by over 400 kts. Not very good odds if you need to outrun interceptors on a penetration mission---The original Bone was designed to be a Mach 2.5 penetration bomber--this airframe, BECAUSE OF POLITICS ONLY has been derated . There have been numerous flight demonstrations that PROVE the Eurofighter Typhoon can outperform most everything in the US inventory, INCLUDING, but not limited to the F-15, F-16, F/A-18, and F-35, at a fraction of the cost of some of those airframes...
As far as the avionics and weapons suites go, our aircraft are topnotch. But, remember this--computer technology becomes obsolete approximately every 18 months...
When the F-15 was first developed, it was unquestionably the most advanced airframe in the world. Total development time from the AF entering requirements to entering full service was less than 4 years. When first developed those aircraft were capable of SUSTAINED PERFORMANCE in the 6G range. Now they are RESTRICTED to no more than 4.5G manuevering. You can upgrade all you want, but airframes wear out. Hence the reason for the rash of F-15 and F-16 accidents over the last few years.
During WWII, once an airframe saw 1000-1500 hours of service the plane was taken out of service as "war weary". Incidentally, many of those war weary birds are still flying as restorations today. Many of our current airframes have 30-40 THOUSAND hours on them. Even if we do not develop new designs, we should replace the older planes. OKay, replace an old F-15 with a NEW F-15. Don't wait till the wings fall off, as they are doing on quite a few of them.
My middle daughter is a maintenance officer on the F-15s. She tells me that most pilots are getting VERY leery of that aircraft...