Mid 40s for 6th gen. That's 23+ years from now .
Between 2028-37 we will start to field Tejas Mk2 , TEDBF , AMCA mk1 sequentially.
So for 6th gen AMCA we have good 20+ years years gap to build adaptive cycle engine by then in JV with Safran or alone. And decent 10 years gap between 5 and 6th...