You can definitely see the B2 exhaust design in the Y23. It seems the Northrop gets the bombers and Lockheed gets the fighters. Makes sense logistically.
Nothing about modern fighter procurement makes any sense logistically!
It seems the F22 was basically picked on the promise to make as many components in as many separate states as possible, in order to ensure every politician on the hill brought into it.
And the idea of servicing different parts of the F35 in different buying countries is another logistical masterstroke, not! Oh my god, servicing F35 engines in Turkey just when Turkey starts to dance with Russia, what were we thinking?
Right now we're telling Turkey you can't have the F35 because you've just brought the S400 SAMs from Russia, but we've already invested in servicing the F35 engines there...
Turkey already bought F-35s[1], but are being told both that they can't buy anymore, and the servicing of the engines will be moved out of Turkey by 2020 if they insist on buying the S-400 from Russia[2][3].
Also, even if they didn't sell the F-35 to Turkey but still serviced the engines there that would make logical sense. The reason the US is paranoid about the S-400 is because they think radar data about the F-35 and other NATO aircraft will be fed back to Russia[4]. That concern obviously doesn't apply to a stand-alone F-35 engine sitting on the ground.
From my reading, I don't think any of the F35s had been delivered, but some Turkish pilots had started training in the US in '18. That is now stopped.
Over 900 parts in the F35 were made by Turkish companies, and they have to now be re-sourced.
Now, I don't think the F35 operators want F35 engines sitting around in a country now receiving Russian military advisers. The idea that the engine isn't classified is crazy.
Russia has similar engines at their disposal as in the F35. The F22 engines however are extremely classified because of their ability to supercruise without afterburners.
The parts we keep secret are the stealth coatings which we do domestically and the sensor fusion which is mostly software based
I believe Turkey owns those F-35s operating in the US, they're used for training. On that Wikipedia page you can see there's dozens of F-35s in the US owned by foreign air forces.
Can they just fly them out of the US at this point? No idea, but it's interesting to see what'll happen with that.
Just because Russia has S-400 advisors in Turkey doesn't mean they get to walk around wherever they want, including wherever the F-35's engines are serviced.
The concern was specifically that they'd have access to detailed radar data on the F-35, which they'd have access to in their roles as advisors for the S-400 missile system.
