The RCS figures being discussed on previous pages --even if we believe they are accurate-- fail to signify one thing. And in the process, make the F-22/35 seem a lot stealthier than what they actually are in an all-encompassing combat scenario.
Several Lockheed engineers/involved people have stated on record that the 0.0001m2 figure is the frontal-aspect signature - which is obviously the part where a plane is designed to be the stealthiest. The side aspect is said to have as much as 0.01m2, a considerable increase.
But what about the figures of the other planes? Are they also front-only? Or are they an average figure calculated by analyzing the signature in all aspects? Because if you change the aspect angle of the probing radar by as much as a single degree, the resulting signature is often significantly different.
As of the F-35, it has been repeatedly stated by everyone from enthusiasts to serving professionals that F-35 is not an all-aspect stealth plane like F-22. Even a visual inspection of the airframe by someone with a fair bit of radar knowledge shows that it simply does not have the kind of angular surfaces and minimal surface discontinuities as present on the F-22. Under the best possible circumstances, the side cross section isn't that lower than a Typhoon or Rafale.
Now coming to weapons, yes, I have already stated that F-35's internal weapon bays are an advantage - but how significant is that advantage? That's the question. In a multi-mission scenario, the JSF can carry at most 2 AAMs and 2 JDAMs internally. That's like the payload of a LIFT trainer converted to combat missions.
And from side-aspect, the weapon body & the fuel tanks in themselves do not give off much return owing to their cylindrical shapes. Except the the specular return (the specific part of a rounded surface that's actually flat enough to send the waveform back).
The smaller surfaces like fins etc. do give off returns as well. But the actual culprits that significantly increase the RCS are the hardpoints from which these weapons & tanks hang from.
Regardless, the adoption of enclosed weapon pods (like those seen on F/A-18ASH) should address the problem to a considerable extent. The incorporation of Conformal Fuel Tanks (CFTs) eliminates the need to carry external drop tanks. Rafale has already been tested with them and all versions have a built-in capability to accept CFTs when needed.
http://www.dassault-aviation.com/wp-content/blogs.dir/1/files/2012/08/Fox_Three_nr_2.pdf
However, the incorporation of all this depends on whether or not the customer (in this case IAF) actually has a requirement for them.
This is when the whole internal carriage thing on F35 begins to sound like an awful attempt to earn brownie points.
And look at how extensively all versions of F35 are being tested with all kinds of external weapon stations. It is obvious that any F35 will HAVE to make use of external weapons if it has to remain
atleast as combat-effective as 4th/4.5 gen planes. The internal-only weapons would be used in a low-risk environment (bombing ISIS and stuff), when you have overwhelming support of friendly air-superiority aircraft & support assets.
Against a competent enemy, it's like fighting with one arm tied.