I see you got a Chinese flag, so you're naturally going to defend your country China.
But here're some facts:
China’s WS‑15 timeline is roughly 15–18 years depending on where you start the clock. Early development began in the mid‑2000s, the first credible flight tests were in 2017, and operational integration happened in 2023. China did receive some material and metallurgy support from Russia, but the engine still took well over a decade to mature.
What makes Turkiye’s situation different is that it receives no engine technology transfers at all. No materials support, no turbine blade know‑how, no hot‑section metallurgy, no compressor IP, and no access to Western or Russian high‑temperature alloys(NYET). Despite that, Turkiye launched the TF35000 program from zero and has already completed core design, compressor testing, turbine testing, and material qualification. First ignition is approaching without any foreign assistance.
So while China needed 15–18 years with external help(Russia, remember), Turkiye is pushing a 5th‑gen engine program under full embargo conditions and still hitting milestones at a competitive pace. The hurdles are far higher, yet the progress is real.
Turkiye is doing something that's never been attempted before and winning.