...I wouldn't keep my hopes up for F-16's being able to operate with impunity, though, even if that happened, and nor would I count on them arriving soon enough to make a significant difference before the end of the year, especially given that it's very unlikely that Ukraine will be able to immediately use them as part of combined arms or immediately execute complex group missions with them. They might be game changers when it comes to the Black Sea, but I don't see them being game changers in general. Useful, though, yes....
Wondering out loud:
One of the surprises of the war is that Russia has not achieved air superiority over Ukraine. That they seem to be using their air force remarkably sparingly. At least that's my impression, as I see little reporting of the RUAF in use - please correct me if my impression is wrong.
The only part of their air fleet that seems to be regularly employed with good effect is the heavy bombers that launch long-range missiles from like the Caspian Sea far into Ukraine. Those stay a long way away from the border.
The reason for this, I suppose, is that Russia lacks the ability to find and take out Ukraine's air defense, from manpads to Patriots and Irises with any meaure of reliability, such that they would suffer more damage than they could inflict if they tried to cross the border or even just get too near to it.
Likewise, Ukraines air force is so weak they can't penetrate into Russian-held territory and are very careful to come near with their SU's and Mig's. and when they do they don't inflict all that much damage - because Russian air defense is still good enough to deter Ukraine from risking what little they have in attack capabilities.
Again, the exception, since lately, are air-launched mid-range missiles (Storm Shadows).
With me so far?
Now. Enter F-16s.
The point of equipping Ukraine with Western fighter jets is for them to be able to penetrate into occupied area, to operate more freely over the Black Sea, or even to go into Russia proper (if NATO donors allow that).
How will the Russians react to that?
Is that when we will see Russian fighters in action? To do dog fights? Rumor has it that some planes+arms in their arsenal aren't all that bad in that regard. We have seen Flankers in action - will we see many more once F-16s are in service? How will that play out?
What are Russian Early Warning capabilities, how fast and where would they be able to intercept Ukrainian attacks? Will this trigger a similar response? I mean once their own airspace becomes dangerous with the presence of F-16s, why not go into UA air space and take the fight there?
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You probably see how I know pretty little about such operations.
Happy to see comments.