Gomig-21 wrote:So the IRST might actually be the best form of taking down an enemy aircraft if the altercation ends up within that particular distance
Certainly for each situation there is a tool that fits best. Russian fighter design culture, if I have learned something about it, tends not to rely exclusively on one approach but rather on avoiding gaps that can be easily exploited. It applies to sensors, to missiles' seekers etc. On a normal case they would operate passively with information relayed to them + ESM + IRST, on others they will operate their radars or even their ECM... the important thing is to have the resources so that you can use them in case of need.
I know this is not the thread to discuss this and it would be off-topic, but could you expound on that first paragraph about the VHF aspect supposedly being able to detect VLO AC just briefly, or maybe point me to another thread that discusses that concept in detail or even a link you learned that from? That would be great and much appreciated.
I guess it doesn't hurt to address that briefly. LO design relies mainly on two aspects, shaping and materials, the first being responsible for most of the RCS reduction and necessary for true VLO design (faceted surfaces, planform alignment and so on). But the effectiveness of shaping is dependent on the physical size of the aircraft's elements compared to the wavelengths of the radar. To put it very simply, if the wavelength is bigger than the plane's surfaces, these cannot redirect the radiation in a controlled way, that means, shaping loses its value and only RAM/RAS apply, but their effectiveness is also dependent on the wavelength. This is the reason why Russians seem so relaxed about Western VLO planes (they say openly that they can see them) and why the West is developing new planes and ways of fighting these low frequency radars.
There are many sources on the internet addressing this issue, maybe one of the best to start with is Carlo Kopp's analysis in Air Power Australia. I have learned also quite a bit from different users in this and other forums, where now and then guys with actual knowledge explain how it is done.
https://www.ausairpower.net/APA-Nebo-SVU-Analysis.html
https://www.ausairpower.net/PDF-A/DT-CVLO-Mar-2012.pdf