I must say that I haven't been keeping up with this topic as of late, but i've read back to November 2012 of the topic and I haven't found a discussion of this article (though its quite fresh):
IN FOCUS: Lockheed claims F-35 kinematics
I do not claim to know a lot about aircraft, at least not in comparison with you guys, so I thought this would be the place to discuss this. I found this on DID actually, and they made a very nice diagram comparing claims from LM test pilot Billy Flynn and counterarguments from other experienced pilots. Now I'm well and truly sold on the F-35, and I believe it will be a very effective fighting machine. However mister Flynn makes some claims that seem a bit optimistic to me.
For one there is this: " Flynn says. "No one is going to see us coming or going." From what I know as a layman the F-35's stealth characteristics are not so fantastic as to support this claim, especially not the "going" part. Because from what I know the rear aspect stealth of the F-35 isn't very impressive, also there is that big whopper of an engine pumping out heat (correct me if I'm wrong) painting a big bulls-eye for IR guided anti air missiles. Also developments in radar, computer and guidance technology are doing a pretty decent job in catching up to the whole stealth thing. Lastly from what I believe the F-22 is more stealthy than the F-35 and that machine isn't invisible either. So is this just marketing jibber jabber?
I guess I just wanted to see what the experts have to say about mr Flynn's remarks and the reactions of the other pilots. I thank you in advance if you choose to discuss it.
Oh and there was one remark I take exception to: we're better than the rest of the world combined' on every measure... I mean c'mon Flynn, even I can't get there and I like the F-35 :S
"Stealth" or "low observability - LO" as it is more accurately known, doesn't make anything invisible. There are whole threads on this on this forum if you want to know more. Basically what LO does, is provide multiple opportunities to break up the
detect, track, engage and destroy cycle of modern air warfare. If you can defeat any one of those stages of air combat, then your aircraft will live to fight another day and will more likely than not achieve it's mission.
When people argue that "computers, radars and sensor" development is reducing the advantage that LO provides, it demonstrates a fair degree of ignorance. Such presumptions assume that LO is not similarly developing and evolving too...
The F-35 is a low observable aircraft from all aspect. The "forward LO" only nonsense, was an attempt by detractors of the aircraft to make it's advantages seem far less significant than they are.
These people of course do not and did not ever have access to the data necessary to make such a judgement whereas the USAF, Lockheed Martin and the US DoD Department of Operational Test and Evaluation do. All have said the F-35's LO is just fine and meets it's goals, not just in the forward sector...
As to the IR issue, yes of course if you pump 43,000lbs of thrust through a turbofan engine, it's going to have a heat signature. There's no denying that and whilst measures can perhaps reduce this signature (burying the engine "deep" in the airframe so it is obscured from view from many angles by other parts of the airframe, mixing exhaust gas with cool air before exiting the aircraft, running cooling systems through the parts of the airframe surrounding the engine and so on) that signature cannot be eliminated entirely.
However whether that signature is of a tactical disadvantage or not is the question. Optical and IR targetting systems are short ranged systems, compared to radar and the F-35 will have weapons capable of engaging targets well beyond the range of any IR or Optical targetting system. F-35 will also have systems capable of decoying or jamming IR systems throughout it's lifespan so again, how much of a weakness is it really?
It is worth noting that as the F-35 itself has a wide variety of optical and IR tracking sensors, such vulnerabilities will be present in any adversaries as well and unlike the F-35 most aircraft flying today have had NO attempts whatsoever at reducing their IR signature...
As to the F-35's kinematics, well as a big a fan of the aircraft as I am, it's kinematic performance does not particularly excite me and I believe I've always been fairly realistic about that. In it's A and B models, it's a heavy aircraft with relatively small wings and a single engine (powerful though that engine may be). In it's C variant it's an even heavier aircraft, with the same engine, though a reasonably large wing.
The F-35 as I understand it, was always designed to exceed the F-16 and F/A-18 series kinematic capability when combat configured in a like configuration (same weapons, same fuel, similar sensor systems). I am convinced it will do so comfortably and combined with it's numerous other advantages will see the F-35 emerge as a truly outstanding combat aircraft.
It may not perform so brilliantly at airshows (though the average crowd won't notice much difference, except in the -B model which will do things no other fighter can at airshows) but then it wasn't designed for this purpose.
It's designed to win in combat and in the overwhelming majority of scenarios, it will do just that.