You think Turkey will attack Russian bases, if a Turkish F-16 is shot down? It seems like a rather serious escalation, especially given the recently demonstrated long-range strike capability Russia has. Would article 5 protect Turkey, if one of their jets is shot down while allegedly violating Syrian airspace? (something they do routinely) Would it apply, if Turkey responded by a strike against Russian bases?
No, I think NATO would attack Russian bases if Turkish F-16's are shot down INSIDE Turkey.
Think in the context for Turkey-wether it's correct or incorrect-they claim that after numerous accidental incursions into their airspace (real or imagined) that they've delivered on their threat to use force. So with that said, if Russia retaliates against a Turkish F-16, it will only strengthen the line of "Russia is the agitator". And if Russia starts downing Turkish military flights over Turkey, I'd bet on a NATO response.
Honestly Feanor, I don't think NATO wants to carry out strikes of that sort (WW3 is in no ones best interest) but if Turkish aircraft are shot down, I see NATO as having to respond, they'd be backed into a corner. The viability of the alliance would be at stake, to do nothing could unravel NATO. It would be a serious escalation, and Russia does indeed have long-range strike capabilities, but so does NATO. We can trade blows until we wreak ourselves if we wish.
Now as you said in your scenario if Turkish F-16's were downed over Syria, I think that would be entirely different. Turkey would be the one who violated Syrian airspace so a shoot down would be justified and I don't see NATO getting involved, and the Turks would be insane to fight Russia on their own.
I was referring to an earlier post you made about members of the Russian public wanting payback, and I think that desire is more than understandable but one must remember, those aren't just Turkish F-16's, those are NATO F-16's. Especially with all the tensions between the Alliance and the Russian Federation, the possibility for a dramatic escalation IS there.
Is Russia prepared for war with NATO and the United States, because that's where that road goes.
The Turks had a F-4 shot down a few years back by the Syrians and they didn't retaliate, because they knew they had no right to, they were in someone else's airspace despite all the fiery rhetoric.