WS10,WS15 and all their siblings are engines developed from taking Russian AL31 class engines as a model and starting point. Chinese have had help from Safran as well in their quest for jet engine manufacturing. There is a crux where you hit the right note in engineering. Due to the deficiencies and contradictions present in Russian engine designs and the involvement of Safran which is in the western school of jet engine designs, they have not progressed as quickly as you would expect. Same happened to the Russians. They just couldn’t achieve transition from directionally solidified crystals to single crystals in their AL31 and AL41 series of engines.In this case, there are two possibilities: Either the WS-15 wasn't ready in 2006 and they lied to everyone, or they're so incompetent that they haven't yet been able to get the engine to the thrust level they're aiming for.
When TF6000 program was started in 2017, Turkiye was negotiating with RR for the KAAN engine and only a year before that the UK prime minister had taken out all stops in helping us in our quest for 5th generation planes and engines.First of all, TF 6000 engine was designed and developed from start to be a 6k lbf engine but it took years of work before it could even run reliably at 3,800 lbf.
Hence developing and producing TF6000 had no urgency attached to it. So it wasn’t until 2022 when the first prototype production was started. Had it not been for the under cover embargoes on auxiliary parts we had to manufacture ourselves, the engine’s first firing would have been in 2023 and not in 2024. So it wasn’t “ years of work” as you put it. Also as both the TF6000 and TF10000 won’t be propelling planes that carry human lives, their integration in to planes will most likely take place in much shorter a time.
When it comes to TF35000, TEI has enough expertise under its belly to overcome the difficulties that may lie ahead.
After all just look at the list of parts TEI produces for the F110 engine:
Specific F110 Engine Parts Produced by TEI:
- Front Frame
- Fan Stator
- #2 Bearing Housing
- Fan Rotor
- Fan Frame
- High Pressure Compressor Rotor (HPCR)
- HPCR Forward Stator
- HPCR Rear Stator
- Combustion Diffuser Nozzle (CDN)
- High Pressure Turbine (HPT) Shroud
- HPT Nozzle
- High Pressure Turbine Rotor (HPTR)
- Low Pressure Turbine (LPT) Rotor
- LPT Stage 1 Nozzle
- LPT Stage 2 Nozzle
- Turbine Frame
- Bell Crank
- Accessory Gearbox
- Outer Duct
- Exhaust Nozzle
- Augmentor