Very true. Also i think the reason back then US needed 4477th Test and Evaluation Squadron because perhaps you did not have an ally or friendly formidable air force having your adversarys aircrafts- with whom you could carry out Air Combat exercises. So by one way or the other get hold of a adversarys aircraft give it to 4477th which US did and test and practice and use simulators if the info can be translated into sims.
So did Israel in 1973. Got hold of a latest MiG-21 and practiced (defected Pilot from Iraq). if they had an ally with MiG 21 in their inventory they would have exercised with them too.
Israel had a great run with F-15s against MiG-21s real combat. In their first ever encounter F-15 Vs MiG-21 , they scored on AIM-7, one Heat seeker missle and one classic cannon kill.. all in one encounter 3 kills long range, Medium heat seeker, and Gun
It is good to have information from allies about their experiences with X, Y, or Z. It is better if they have X, Y, and Z in their possession and they share. But it is
ALWAYS best to have X, Y, and Z in your own possession to study and experience at your own pace. The further an experience is apart from you in terms of degrees, the more diluted that experience becomes, facts may be deliberately omitted or forgotten, interpretations can be colored by personal biases, environmental factors are not as varied, the list is long.
I
am also assuming that SU30 has a higher IR signature but based on my own humble observations, I havent seen SU30 in flesh (rather in metal
) but can only guess that perhaps my theory holds based on Pictures that we have seen of the aircraft
Metal nacelles of aircraft. Engines overly exposed and reading a bit on IR Signature. Now what i was getting to was that overly exposed Engine IR signature would make it a tad bit more susceptible to IR missiles, in my Initial Post I stressed on all aspect AIM sidewinder.
Usually the rear aspect of the aircraft is best for Heat seeker to score a kill, based on what I was pointing out as Over exposure the side Aspects and certainly top Aspect would give a better IRS and better chances for a AIM-9 sidewinder Kill.
The assumption is not baseless. The engines straddle the fence between being completely enclosed by the fuselage and being 'podded'. A 'nacelle' is a covering, as in how a 'nacelle' covers the podded engine on a 747.
We can see the demarcation of where the engine, as a distinct component, being exposed from the main body. Whether that exposure equals to an increase in infrared (IR) exposure is understandably speculative but also is not baseless.
In IR detection, even a tray of 'fresh-from-the-freezer' ice cubes emit IR radiation. But IR detection is not the same as infrared
IMAGING, which is considerably more data collection intensive and processing. Infrared detection merely distinguishes whatever level of IR radiation from a contrast, such as a background. So against a missile that is equipped with IR detection, confinement of direction of IR radiation by an engine is important. A jet engine have an exhaust direction so IR radiation in that direction is inevitable. The engine itself radiate IR emissions through all of its components, from plumbing to panels to 'turkey feathers' or nozzles.
Do we want the enemy IR detector to see this...
Infrared Training Center Message Board
...Or do we want to limit his view to this...
Infrared Signature Modelling and Measurement - BAE Systems
The second view is much more preferable.
In the first view, if we take the IR detector's perspective we would be looking at two items:
- Concentrated heat as in exhaust streams.
- Diluted heat as radiated by engine components.
We do not know if the Su's IR radiation pattern is like the first view but because of the engines' partial exposure from the fuselage or non-covered condition, it is reasonable to assume that the engines' IR radiation pattern will resemble the first view. Keep in mind that the Su's vertical and horizontal stabs may limit viewing angles by an IR detector.
However...Against an IR imaging system, it is a whole different story. An IR imaging system take discrete IR radiation sources, such as that of an engine, leading edges of structures that are heated by aerodynamic contacts, and even the cockpit area, to form a composite of what is programmed to be an 'aircraft'.
In radar detection, we have this EM graph of electrical spikes of the many EM scattering structures...
No difference in principle via IR radiation sources imaging. Only different in medium, or rather freq spectrum, and technical components.
The American AIM-9X went beyond mere IR detection but actually form a composite image of the target via discrete IR radiators produced by the target. The composition capability approaches that of 'thermography', which is actually the first view of a jet engine presented above. That is why the AIM-9X can attack 'all aspect', meaning it does not need high intensity IR radiators like the engines to call 'target', but it can take IR radiations from heated leading edges, heated cockpits, and perhaps even heat from the pilot's face, to form a pattern that based upon programming to call 'target'.