Mahmut Akşit has stated in multiple interviews that the preliminary schedule for the first TF6000 prototype was the first
half of 2023, but that will probably be delayed into late 2023 (due to supply chain issues, not embargoes per se) and that for them to start on the production of TF10000 they need to see certain test results of TF6000, hence first prototype of TF10000 will be ready from a year to a year and a half after the TF6000 prototype.
This is what worries me about MMU engine, because we see a worrying trend looking at development history of engines from EJ200 (
here; from demonstrator in 1982, first prototype in 1991 to flight certification in 1997; overall tests done on 14 prototypes), and M88 (
here; component tests starting from 1978, core engine tests 1983-86, 1989 first run of the prototype, first production engine in late 1996; again 14 prototypes), to
izdeliye 99 which started off in early 70s and was only fully operational in first T-10s (Su-27) entering service in 1990, to WS-15 starting development from 90s and reporting on first successful prototype tests in 2009 to where we are now in 2023 and still the engine is nowhere to be seen and last but not least the failure of decades-long Kaveri. These are smaller, less powerful older generation engines, compared to what MMU's engine is purported to be, and from companies with quite a bit of experience in developing turbofans.
I have no idea why SSB is dilly-dallying in this regard, seeing as how this is the toughest and most strategic part of any of our defense industry projects. Instead of total mobilization of forces and a strong-willed focus, we just see a very lax approach. Maybe something better is brewing behind the scenes, but from what we have heard from them this doesn't seem to be the case, as they are still waiting for a proposal from TAEC and maybe are not investing in TEI as much as they should, seeing how they are still trying to prove themselves in an at least three-year-path in developing TF6000 and TF10000 to maybe after all of this start to design MMU's engine which will be very late indeed.