So how many PAK-FA/T-50/Su-57s are in service now? Based on the delivery dates, I’m seeing this:

2019: 1 aircraft, but crashed and destroyed in December

2020: 1 aircraft

2021: 3 aircraft

2022: 4 aircraft

2023: 8 aircraft

This means that 17 operational aircraft were built, but one crashed and destroyed so 16 aircraft are delivered and operational so far?