-Why not ?I'm sorry for being blunt but that's impossible unless we put together a TF35000 prototype and ignite this year(which is also impossible). We would be very lucky if we had TFX starting flying with TF35000 prototypes in 2028.
End of 2025 First test firing of TF 35000
2026-27 Prototypes inside TFX and testing completion .
2028-29 - First TFX operational with National engine .