bobbymike said:
So from an engineering, platform, engine point of view the more things change the more things they stay the same.
Errrr... not quite sure what you mean there. But consider this:
This little varmint is "Cladoselache," one of the earliest sharks. It evolved in the Devonian era, about 370 million years ago. Now, it is clearly different from modern sharks in a number of important aspects (the jaw position, for one)... but the basic "design" of the shark is already there. It is clearly recognizable as a shark. There are no major structures that are obviously *very* different between Cladoselache and, say, a Great White.
Why is this? Is it because 370 million years ain't time enough to evolve neato new critters? No, it's because 370 million years ago, evolution damn near perfected the aquatic predator. All sharks since Cladoselache have been variations on the same theme. Physics, and the facts of terrestrial biochemistry, have limits. And there are optimum combinations to achieve certain ends. And grand experiments are expensive and difficult... both in evolution and in engineering.
So as with the shark, barring some game-changer in terms of materials or propulsion technology (materials that are lightweight, durable and retain strength at, say, 3000 degrees, coupled with scramjets that feed on metallic hydrogen granules, or antigravity, or practical atomic propulsion, or antimatter, whatever), military aircraft have probably reached something of a zenith. Because physics does not support *affordable* major improvements.
Also: witness the end of the line in pistol development:
The Colt model M1911. It's called the "1911" because it was designed in nineteen-friggen-eleven. Ninetry eight years ago, the modern pistol was created... and not *really* fundamentally improved upon since. Apart from the double-stack magazine and the lasersight, there's nothing really greatly different about modern pistols. When I go out and about, the pistol I carry is clearly derived from the 1911; and I have two actual 1911's and one double-stack copy of the 1911 at home. You'd think that a century would see major improvements... compare the 2011 pistol to the 1911 pistol to the 1811 pistol. Something happened. That somehting was... the perfection of the concept. So until laserpistols or C-beams or phasers come on the market... it will all be just variations on a theme.
The same goes for the automobile. For the most part, the car you drive today is not a substantial improvement over cars from the 1950s. Sure, fuel economy has improved, safety features have gotten better, lots of new gadgets... but it's still almsot certainly a metal box with four rubber wheels guided by a human holding onto a wheel, and powered by a fossil-fuel brning piston engine. Hybrids, electical cars, fuel cells, etc. are all clear possibilities for the realtively near future... but these propulsion systems aren't real useful for aircraft.
Maybe the only "revolutionary" advances are the internal electronic systems and the software that runs them?
Those are certainly the most important real advanced that aeronautics has seen. But even with computers so advanced that the pilot can be removed from the aircraft, the aircraft itself is little different than what one might hav eseen on the drawing boards forty five years ago.