First ignition of the TF6000 being in the first quarter of 2023 can mean that a usable UCAV engine can be obtained in just a year from today as I don't think they will take too much time optimizing it. If all goes well Kızılelma can even be flying with a TF6000 in its heart before 2023 ends. Of course this is probably the best case scenario. However I can not help but imagine Kızılelma flying with a TF6000 as early as mid 2023 in the real best case scenario. Should a pressing situation emerge this can very well happen.