What is the probability of two fighter going against each other to be EXACTLY on a straight line facing each other ? The turbine blades are so deep inside intake cavity that a few degrees off the straight line into sideways and they are invisible. But by that distance you already have other detection mechanisms operating such as OLS etc. At long distances IR signals are weak because of lower energy.
The is a small book on the internet introducing VLO. Apparently the problem with radar reflections is like a “cat’s eyes” – the cockpit and air intakes makes the waves bounce back and forth several times before they are reflected back IN MANY DIRECTIONS! See page 25: http://www.scribd.com/doc/12560170/The-Radar-Game-Understanding-Stealth-and-Aircraft-Survivability
I believe this is an inlet duct for the F-22. The outside (underbelly) of the plane is deceiving as it suggest an straighter duct. The duct curves inwards to create room for the weapons bay – something you can see in the front view images posted above.
I know a lot of internet sources qoute the Mig-29A RSC as 5sqm. However the only published RCS I have seen for the MiG-29A says 3 sqm.
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